|
1
|
Agnese R, Anderson AJ, Aramaki T, Asai M, Baker W, Balakishiyeva D, Barker D, Basu Thakur R, Bauer DA, Billard J, Borgland A, Bowles MA, Brink PL, Bunker R, Cabrera B, Caldwell DO, Calkins R, Cerdeno DG, Chagani H, Chen Y, Cooley J, Cornell B, Cushman P, Daal M, Di Stefano PCF, Doughty T, Esteban L, Fallows S, Figueroa-Feliciano E, Ghaith M, Godfrey GL, Golwala SR, Hall J, Harris HR, Hofer T, Holmgren D, Hsu L, Huber ME, Jardin D, Jastram A, Kamaev O, Kara B, Kelsey MH, Kennedy A, Leder A, Loer B, Lopez Asamar E, Lukens P, Mahapatra R, Mandic V, Mast N, Mirabolfathi N, Moffatt RA, Morales Mendoza JD, Oser SM, Page K, Page WA, Partridge R, Pepin M, Phipps A, Prasad K, Pyle M, Qiu H, Rau W, Redl P, Reisetter A, Ricci Y, Roberts A, Rogers HE, Saab T, Sadoulet B, Sander J, Schneck K, Schnee RW, Scorza S, Serfass B, Shank B, Speller D, Toback D, Underwood R, Upadhyayula S, Villano AN, Welliver B, Wilson JS, Wright DH, Yellin S, Yen JJ, Young BA, Zhang J. New Results from the Search for Low-Mass Weakly Interacting Massive Particles with the CDMS Low Ionization Threshold Experiment. Phys Rev Lett 2016; 116:071301. [PMID: 26943526 DOI: 10.1103/physrevlett.116.071301] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Indexed: 06/05/2023]
Abstract
The CDMS low ionization threshold experiment (CDMSlite) uses cryogenic germanium detectors operated at a relatively high bias voltage to amplify the phonon signal in the search for weakly interacting massive particles (WIMPs). Results are presented from the second CDMSlite run with an exposure of 70 kg day, which reached an energy threshold for electron recoils as low as 56 eV. A fiducialization cut reduces backgrounds below those previously reported by CDMSlite. New parameter space for the WIMP-nucleon spin-independent cross section is excluded for WIMP masses between 1.6 and 5.5 GeV/c^{2}.
Collapse
Affiliation(s)
- R Agnese
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - A J Anderson
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - T Aramaki
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - M Asai
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - W Baker
- Department of Physics and Astronomy, and the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA
| | - D Balakishiyeva
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - D Barker
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - R Basu Thakur
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - D A Bauer
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - J Billard
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - A Borgland
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - M A Bowles
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - P L Brink
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - R Bunker
- Department of Physics, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, USA
| | - B Cabrera
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - D O Caldwell
- Department of Physics, University of California, Santa Barbara, California 93106, USA
| | - R Calkins
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - D G Cerdeno
- Institute for Particle Physics Phenomenology, Department of Physics, Durham University, Durham DH1 3LE, United Kingdom
| | - H Chagani
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - Y Chen
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - J Cooley
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - B Cornell
- Division of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - P Cushman
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - M Daal
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - P C F Di Stefano
- Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - T Doughty
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - L Esteban
- Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - S Fallows
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - E Figueroa-Feliciano
- Department of Physics & Astronomy, Northwestern University, Evanston, Illinois 60208-3112, USA
| | - M Ghaith
- Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - G L Godfrey
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - S R Golwala
- Division of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - J Hall
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - H R Harris
- Department of Physics and Astronomy, and the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA
| | - T Hofer
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - D Holmgren
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - L Hsu
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - M E Huber
- Department of Physics, University of Colorado Denver, Denver, Colorado 80217, USA
| | - D Jardin
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - A Jastram
- Department of Physics and Astronomy, and the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA
| | - O Kamaev
- Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - B Kara
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - M H Kelsey
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - A Kennedy
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - A Leder
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - B Loer
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - E Lopez Asamar
- Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - P Lukens
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - R Mahapatra
- Department of Physics and Astronomy, and the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA
| | - V Mandic
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - N Mast
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - N Mirabolfathi
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - R A Moffatt
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - J D Morales Mendoza
- Department of Physics and Astronomy, and the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA
| | - S M Oser
- Department of Physics & Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - K Page
- Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - W A Page
- Department of Physics & Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - R Partridge
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - M Pepin
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - A Phipps
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - K Prasad
- Department of Physics and Astronomy, and the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA
| | - M Pyle
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - H Qiu
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - W Rau
- Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - P Redl
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - A Reisetter
- Department of Physics, University of Evansville, Evansville, Indiana 47722, USA
| | - Y Ricci
- Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - A Roberts
- Department of Physics, University of South Dakota, Vermillion, South Dakota 57069, USA
| | - H E Rogers
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - T Saab
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - B Sadoulet
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - J Sander
- Department of Physics, University of South Dakota, Vermillion, South Dakota 57069, USA
| | - K Schneck
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - R W Schnee
- Department of Physics, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, USA
| | - S Scorza
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - B Serfass
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - B Shank
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - D Speller
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - D Toback
- Department of Physics and Astronomy, and the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA
| | - R Underwood
- Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - S Upadhyayula
- Department of Physics and Astronomy, and the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA
| | - A N Villano
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - B Welliver
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - J S Wilson
- Department of Physics and Astronomy, and the Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA
| | - D H Wright
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - S Yellin
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - J J Yen
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - B A Young
- Department of Physics, Santa Clara University, Santa Clara, California 95053, USA
| | - J Zhang
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| |
Collapse
|
|
2
|
Agnese R, Anderson AJ, Balakishiyeva D, Basu Thakur R, Bauer DA, Billard J, Borgland A, Bowles MA, Brandt D, Brink PL, Bunker R, Cabrera B, Caldwell DO, Cerdeno DG, Chagani H, Chen Y, Cooley J, Cornell B, Crewdson CH, Cushman P, Daal M, Di Stefano PCF, Doughty T, Esteban L, Fallows S, Figueroa-Feliciano E, Godfrey GL, Golwala SR, Hall J, Harris HR, Hertel SA, Hofer T, Holmgren D, Hsu L, Huber ME, Jastram A, Kamaev O, Kara B, Kelsey MH, Kennedy A, Kiveni M, Koch K, Leder A, Loer B, Lopez Asamar E, Mahapatra R, Mandic V, Martinez C, McCarthy KA, Mirabolfathi N, Moffatt RA, Moore DC, Nelson H, Nelson RH, Ogburn RW, Page K, Page WA, Partridge R, Pepin M, Phipps A, Prasad K, Pyle M, Qiu H, Rau W, Redl P, Reisetter A, Ricci Y, Rogers HE, Saab T, Sadoulet B, Sander J, Schneck K, Schnee RW, Scorza S, Serfass B, Shank B, Speller D, Upadhyayula S, Villano AN, Welliver B, Wright DH, Yellin S, Yen JJ, Young BA, Zhang J. First direct limits on lightly ionizing particles with electric charge less than e/6. Phys Rev Lett 2015; 114:111302. [PMID: 25839256 DOI: 10.1103/physrevlett.114.111302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Indexed: 06/04/2023]
Abstract
While the standard model of particle physics does not include free particles with fractional charge, experimental searches have not ruled out their existence. We report results from the Cryogenic Dark Matter Search (CDMS II) experiment that give the first direct-detection limits for cosmogenically produced relativistic particles with electric charge lower than e/6. A search for tracks in the six stacked detectors of each of two of the CDMS II towers finds no candidates, thereby excluding new parameter space for particles with electric charges between e/6 and e/200.
Collapse
Affiliation(s)
- R Agnese
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - A J Anderson
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - D Balakishiyeva
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - R Basu Thakur
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - D A Bauer
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - J Billard
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - A Borgland
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - M A Bowles
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - D Brandt
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - P L Brink
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - R Bunker
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
- Department of Physics, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, USA
| | - B Cabrera
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - D O Caldwell
- Department of Physics, University of California, Santa Barbara, California 93106, USA
| | - D G Cerdeno
- Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- IPPP, Department of Physics, Durham University, Durham DH1 3LE, United Kingdom
| | - H Chagani
- School of Physics & Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - Y Chen
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - J Cooley
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - B Cornell
- Division of Physics, Mathematics, & Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - C H Crewdson
- Department of Physics, Queen's University, Kingston, ON, Canada K7L 3N6
| | - P Cushman
- School of Physics & Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - M Daal
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - P C F Di Stefano
- Department of Physics, Queen's University, Kingston, ON, Canada K7L 3N6
| | - T Doughty
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - L Esteban
- Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - S Fallows
- School of Physics & Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - E Figueroa-Feliciano
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - G L Godfrey
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - S R Golwala
- Division of Physics, Mathematics, & Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - J Hall
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - H R Harris
- Department of Physics & Astronomy, Texas A&M University, College Station, Texas 77843, USA
| | - S A Hertel
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - T Hofer
- School of Physics & Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - D Holmgren
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - L Hsu
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - M E Huber
- Department of Physics, University of Colorado Denver, Denver, Colorado 80217, USA
| | - A Jastram
- Department of Physics & Astronomy, Texas A&M University, College Station, Texas 77843, USA
| | - O Kamaev
- Department of Physics, Queen's University, Kingston, ON, Canada K7L 3N6
| | - B Kara
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - M H Kelsey
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - A Kennedy
- School of Physics & Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - M Kiveni
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - K Koch
- School of Physics & Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - A Leder
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - B Loer
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - E Lopez Asamar
- Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - R Mahapatra
- Department of Physics & Astronomy, Texas A&M University, College Station, Texas 77843, USA
| | - V Mandic
- School of Physics & Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - C Martinez
- Department of Physics, Queen's University, Kingston, ON, Canada K7L 3N6
| | - K A McCarthy
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - N Mirabolfathi
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - R A Moffatt
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - D C Moore
- Division of Physics, Mathematics, & Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - H Nelson
- Department of Physics, University of California, Santa Barbara, California 93106, USA
| | - R H Nelson
- Division of Physics, Mathematics, & Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - R W Ogburn
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - K Page
- Department of Physics, Queen's University, Kingston, ON, Canada K7L 3N6
| | - W A Page
- Department of Physics & Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - R Partridge
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - M Pepin
- School of Physics & Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - A Phipps
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - K Prasad
- Department of Physics & Astronomy, Texas A&M University, College Station, Texas 77843, USA
| | - M Pyle
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - H Qiu
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - W Rau
- Department of Physics, Queen's University, Kingston, ON, Canada K7L 3N6
| | - P Redl
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - A Reisetter
- Department of Physics, University of Evansville, Evansville, Indiana 47722, USA
| | - Y Ricci
- Department of Physics, Queen's University, Kingston, ON, Canada K7L 3N6
| | - H E Rogers
- School of Physics & Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - T Saab
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - B Sadoulet
- Department of Physics, University of California, Berkeley, California 94720, USA
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - J Sander
- Department of Physics & Astronomy, Texas A&M University, College Station, Texas 77843, USA
- Department of Physics, University of South Dakota, Vermillion, South Dakota 57069, USA
| | - K Schneck
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - R W Schnee
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
- Department of Physics, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, USA
| | - S Scorza
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
- Karlsruhe Institute of Technology, Institut für Experimentelle Kernphysik, 76128 Karlsruhe, Germany
| | - B Serfass
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - B Shank
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - D Speller
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - S Upadhyayula
- Department of Physics & Astronomy, Texas A&M University, College Station, Texas 77843, USA
| | - A N Villano
- School of Physics & Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - B Welliver
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - D H Wright
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - S Yellin
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - J J Yen
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - B A Young
- Department of Physics, Santa Clara University, Santa Clara, California 95053, USA
| | - J Zhang
- School of Physics & Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| |
Collapse
|
|
3
|
Agnese R, Anderson AJ, Asai M, Balakishiyeva D, Basu Thakur R, Bauer DA, Beaty J, Billard J, Borgland A, Bowles MA, Brandt D, Brink PL, Bunker R, Cabrera B, Caldwell DO, Cerdeno DG, Chagani H, Chen Y, Cherry M, Cooley J, Cornell B, Crewdson CH, Cushman P, Daal M, DeVaney D, Di Stefano PCF, Silva EDCE, Doughty T, Esteban L, Fallows S, Figueroa-Feliciano E, Godfrey GL, Golwala SR, Hall J, Hansen S, Harris HR, Hertel SA, Hines BA, Hofer T, Holmgren D, Hsu L, Huber ME, Jastram A, Kamaev O, Kara B, Kelsey MH, Kenany S, Kennedy A, Kiveni M, Koch K, Leder A, Loer B, Lopez Asamar E, Mahapatra R, Mandic V, Martinez C, McCarthy KA, Mirabolfathi N, Moffatt RA, Nelson RH, Novak L, Page K, Partridge R, Pepin M, Phipps A, Platt M, Prasad K, Pyle M, Qiu H, Rau W, Redl P, Reisetter A, Resch RW, Ricci Y, Ruschman M, Saab T, Sadoulet B, Sander J, Schmitt RL, Schneck K, Schnee RW, Scorza S, Seitz DN, Serfass B, Shank B, Speller D, Tomada A, Upadhyayula S, Villano AN, Welliver B, Wright DH, Yellin S, Yen JJ, Young BA, Zhang J. Search for low-mass weakly interacting massive particles with SuperCDMS. Phys Rev Lett 2014; 112:241302. [PMID: 24996080 DOI: 10.1103/physrevlett.112.241302] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Indexed: 06/03/2023]
Abstract
We report a first search for weakly interacting massive particles (WIMPs) using the background rejection capabilities of SuperCDMS. An exposure of 577 kg days was analyzed for WIMPs with mass <30 GeV/c(2), with the signal region blinded. Eleven events were observed after unblinding. We set an upper limit on the spin-independent WIMP-nucleon cross section of 1.2×10(-42) cm(2) at 8 GeV/c(2). This result is in tension with WIMP interpretations of recent experiments and probes new parameter space for WIMP-nucleon scattering for WIMP masses <6 GeV/c(2).
Collapse
Affiliation(s)
- R Agnese
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - A J Anderson
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - M Asai
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - D Balakishiyeva
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - R Basu Thakur
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA and Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - D A Bauer
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - J Beaty
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - J Billard
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - A Borgland
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - M A Bowles
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - D Brandt
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - P L Brink
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - R Bunker
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - B Cabrera
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - D O Caldwell
- Department of Physics, University of California, Santa Barbara, California 93106, USA
| | - D G Cerdeno
- Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - H Chagani
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - Y Chen
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - M Cherry
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - J Cooley
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - B Cornell
- Division of Physics, Mathematics, & Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - C H Crewdson
- Department of Physics, Queen's University, Kingston, Ontario K7 L 3N6, Canada
| | - P Cushman
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - M Daal
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - D DeVaney
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - P C F Di Stefano
- Department of Physics, Queen's University, Kingston, Ontario K7 L 3N6, Canada
| | - E Do Couto E Silva
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - T Doughty
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - L Esteban
- Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - S Fallows
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - E Figueroa-Feliciano
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - G L Godfrey
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - S R Golwala
- Division of Physics, Mathematics, & Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - J Hall
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - S Hansen
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - H R Harris
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - S A Hertel
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - B A Hines
- Department of Physics, University of Colorado Denver, Denver, Colorado 80217, USA
| | - T Hofer
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - D Holmgren
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - L Hsu
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - M E Huber
- Department of Physics, University of Colorado Denver, Denver, Colorado 80217, USA
| | - A Jastram
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - O Kamaev
- Department of Physics, Queen's University, Kingston, Ontario K7 L 3N6, Canada
| | - B Kara
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - M H Kelsey
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - S Kenany
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - A Kennedy
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - M Kiveni
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - K Koch
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - A Leder
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - B Loer
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - E Lopez Asamar
- Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - R Mahapatra
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - V Mandic
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - C Martinez
- Department of Physics, Queen's University, Kingston, Ontario K7 L 3N6, Canada
| | - K A McCarthy
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - N Mirabolfathi
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - R A Moffatt
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - R H Nelson
- Division of Physics, Mathematics, & Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - L Novak
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - K Page
- Department of Physics, Queen's University, Kingston, Ontario K7 L 3N6, Canada
| | - R Partridge
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - M Pepin
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - A Phipps
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - M Platt
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - K Prasad
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - M Pyle
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - H Qiu
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - W Rau
- Department of Physics, Queen's University, Kingston, Ontario K7 L 3N6, Canada
| | - P Redl
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - A Reisetter
- Department of Physics, University of Evansville, Evansville, Indiana 47722, USA
| | - R W Resch
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Y Ricci
- Department of Physics, Queen's University, Kingston, Ontario K7 L 3N6, Canada
| | - M Ruschman
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - T Saab
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - B Sadoulet
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA and Department of Physics, University of California, Berkeley, California 94720, USA
| | - J Sander
- Department of Physics, University of South Dakota, Vermillion, South Dakota 57069, USA
| | - R L Schmitt
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - K Schneck
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - R W Schnee
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - S Scorza
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - D N Seitz
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - B Serfass
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - B Shank
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - D Speller
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - A Tomada
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - S Upadhyayula
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - A N Villano
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - B Welliver
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - D H Wright
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - S Yellin
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - J J Yen
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - B A Young
- Department of Physics, Santa Clara University, Santa Clara, California 95053, USA
| | - J Zhang
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| |
Collapse
|
|
4
|
Agnese R, Anderson AJ, Asai M, Balakishiyeva D, Basu Thakur R, Bauer DA, Billard J, Borgland A, Bowles MA, Brandt D, Brink PL, Bunker R, Cabrera B, Caldwell DO, Cerdeno DG, Chagani H, Cooley J, Cornell B, Crewdson CH, Cushman P, Daal M, Di Stefano PCF, Doughty T, Esteban L, Fallows S, Figueroa-Feliciano E, Godfrey GL, Golwala SR, Hall J, Harris HR, Hertel SA, Hofer T, Holmgren D, Hsu L, Huber ME, Jastram A, Kamaev O, Kara B, Kelsey MH, Kennedy A, Kiveni M, Koch K, Loer B, Lopez Asamar E, Mahapatra R, Mandic V, Martinez C, McCarthy KA, Mirabolfathi N, Moffatt RA, Moore DC, Nadeau P, Nelson RH, Page K, Partridge R, Pepin M, Phipps A, Prasad K, Pyle M, Qiu H, Rau W, Redl P, Reisetter A, Ricci Y, Saab T, Sadoulet B, Sander J, Schneck K, Schnee RW, Scorza S, Serfass B, Shank B, Speller D, Villano AN, Welliver B, Wright DH, Yellin S, Yen JJ, Young BA, Zhang J. Search for low-mass weakly interacting massive particles using voltage-assisted calorimetric ionization detection in the SuperCDMS experiment. Phys Rev Lett 2014; 112:041302. [PMID: 24580434 DOI: 10.1103/physrevlett.112.041302] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Indexed: 06/03/2023]
Abstract
SuperCDMS is an experiment designed to directly detect weakly interacting massive particles (WIMPs), a favored candidate for dark matter ubiquitous in the Universe. In this Letter, we present WIMP-search results using a calorimetric technique we call CDMSlite, which relies on voltage-assisted Luke-Neganov amplification of the ionization energy deposited by particle interactions. The data were collected with a single 0.6 kg germanium detector running for ten live days at the Soudan Underground Laboratory. A low energy threshold of 170 eVee (electron equivalent) was obtained, which allows us to constrain new WIMP-nucleon spin-independent parameter space for WIMP masses below 6 GeV/c2.
Collapse
Affiliation(s)
- R Agnese
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - A J Anderson
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - M Asai
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - D Balakishiyeva
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - R Basu Thakur
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA and Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - D A Bauer
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - J Billard
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - A Borgland
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - M A Bowles
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - D Brandt
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - P L Brink
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - R Bunker
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - B Cabrera
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - D O Caldwell
- Department of Physics, University of California, Santa Barbara, California 93106, USA
| | - D G Cerdeno
- Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - H Chagani
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - J Cooley
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - B Cornell
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - C H Crewdson
- Department of Physics, Queen's University, Kingston Ontario, Canada K7L 3N6
| | - P Cushman
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - M Daal
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - P C F Di Stefano
- Department of Physics, Queen's University, Kingston Ontario, Canada K7L 3N6
| | - T Doughty
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - L Esteban
- Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - S Fallows
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - E Figueroa-Feliciano
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - G L Godfrey
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - S R Golwala
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - J Hall
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - H R Harris
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - S A Hertel
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - T Hofer
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - D Holmgren
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - L Hsu
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - M E Huber
- Department of Physics, University of Colorado Denver, Denver, Colorado 80217, USA
| | - A Jastram
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - O Kamaev
- Department of Physics, Queen's University, Kingston Ontario, Canada K7L 3N6
| | - B Kara
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - M H Kelsey
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - A Kennedy
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - M Kiveni
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - K Koch
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - B Loer
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - E Lopez Asamar
- Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - R Mahapatra
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - V Mandic
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - C Martinez
- Department of Physics, Queen's University, Kingston Ontario, Canada K7L 3N6
| | - K A McCarthy
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - N Mirabolfathi
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - R A Moffatt
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - D C Moore
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - P Nadeau
- Department of Physics, Queen's University, Kingston Ontario, Canada K7L 3N6
| | - R H Nelson
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - K Page
- Department of Physics, Queen's University, Kingston Ontario, Canada K7L 3N6
| | - R Partridge
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - M Pepin
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - A Phipps
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - K Prasad
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - M Pyle
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - H Qiu
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - W Rau
- Department of Physics, Queen's University, Kingston Ontario, Canada K7L 3N6
| | - P Redl
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - A Reisetter
- Department of Physics, University of Evansville, Evansville, Indiana 47722, USA
| | - Y Ricci
- Department of Physics, Queen's University, Kingston Ontario, Canada K7L 3N6
| | - T Saab
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - B Sadoulet
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA and Department of Physics, University of California, Berkeley, California 94720, USA
| | - J Sander
- Department of Physics, University of South Dakota, Vermillion, South Dakota 57069, USA
| | - K Schneck
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - R W Schnee
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - S Scorza
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - B Serfass
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - B Shank
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - D Speller
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - A N Villano
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - B Welliver
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - D H Wright
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - S Yellin
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - J J Yen
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - B A Young
- Department of Physics, Santa Clara University, Santa Clara, California 95053, USA
| | - J Zhang
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| |
Collapse
|
|
5
|
Agnese R, Ahmed Z, Anderson AJ, Arrenberg S, Balakishiyeva D, Basu Thakur R, Bauer DA, Billard J, Borgland A, Brandt D, Brink PL, Bruch T, Bunker R, Cabrera B, Caldwell DO, Cerdeno DG, Chagani H, Cooley J, Cornell B, Crewdson CH, Cushman P, Daal M, Dejongh F, do Couto e Silva E, Doughty T, Esteban L, Fallows S, Figueroa-Feliciano E, Filippini J, Fox J, Fritts M, Godfrey GL, Golwala SR, Hall J, Harris RH, Hertel SA, Hofer T, Holmgren D, Hsu L, Huber ME, Jastram A, Kamaev O, Kara B, Kelsey MH, Kennedy A, Kim P, Kiveni M, Koch K, Kos M, Leman SW, Loer B, Lopez Asamar E, Mahapatra R, Mandic V, Martinez C, McCarthy KA, Mirabolfathi N, Moffatt RA, Moore DC, Nadeau P, Nelson RH, Page K, Partridge R, Pepin M, Phipps A, Prasad K, Pyle M, Qiu H, Rau W, Redl P, Reisetter A, Ricci Y, Saab T, Sadoulet B, Sander J, Schneck K, Schnee RW, Scorza S, Serfass B, Shank B, Speller D, Sundqvist KM, Villano AN, Welliver B, Wright DH, Yellin S, Yen JJ, Yoo J, Young BA, Zhang J. Silicon detector dark matter results from the final exposure of CDMS II. Phys Rev Lett 2013; 111:251301. [PMID: 24483735 DOI: 10.1103/physrevlett.111.251301] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2013] [Revised: 07/27/2013] [Indexed: 06/03/2023]
Abstract
We report results of a search for weakly interacting massive particles (WIMPS) with the silicon detectors of the CDMS II experiment. This blind analysis of 140.2 kg day of data taken between July 2007 and September 2008 revealed three WIMP-candidate events with a surface-event background estimate of 0.41(-0.08)(+0.20)(stat)(-0.24)(+0.28)(syst). Other known backgrounds from neutrons and 206Pb are limited to <0.13 and <0.08 events at the 90% confidence level, respectively. The exposure of this analysis is equivalent to 23.4 kg day for a recoil energy range of 7-100 keV for a WIMP of mass 10 GeV/c2. The probability that the known backgrounds would produce three or more events in the signal region is 5.4%. A profile likelihood ratio test of the three events that includes the measured recoil energies gives a 0.19% probability for the known-background-only hypothesis when tested against the alternative WIMP+background hypothesis. The highest likelihood occurs for a WIMP mass of 8.6 GeV/c2 and WIMP-nucleon cross section of 1.9×10(-41) cm2.
Collapse
Affiliation(s)
- R Agnese
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - Z Ahmed
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - A J Anderson
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - S Arrenberg
- Physics Institute, University of Zürich, Winterthurerstrasse 190, CH-8057, Switzerland
| | - D Balakishiyeva
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - R Basu Thakur
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - D A Bauer
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - J Billard
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - A Borgland
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, Menlo Park, California 94025, USA
| | - D Brandt
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, Menlo Park, California 94025, USA
| | - P L Brink
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, Menlo Park, California 94025, USA
| | - T Bruch
- Physics Institute, University of Zürich, Winterthurerstrasse 190, CH-8057, Switzerland
| | - R Bunker
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - B Cabrera
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - D O Caldwell
- Department of Physics, University of California, Santa Barbara, California 93106, USA
| | - D G Cerdeno
- Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - H Chagani
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - J Cooley
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - B Cornell
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - C H Crewdson
- Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - P Cushman
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - M Daal
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - F Dejongh
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - E do Couto e Silva
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, Menlo Park, California 94025, USA
| | - T Doughty
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - L Esteban
- Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - S Fallows
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - E Figueroa-Feliciano
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - J Filippini
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - J Fox
- Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - M Fritts
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - G L Godfrey
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, Menlo Park, California 94025, USA
| | - S R Golwala
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - J Hall
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - R H Harris
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - S A Hertel
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - T Hofer
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - D Holmgren
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - L Hsu
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - M E Huber
- Department of Physics, University of Colorado, Denver, Colorado 80217, USA
| | - A Jastram
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - O Kamaev
- Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - B Kara
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - M H Kelsey
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, Menlo Park, California 94025, USA
| | - A Kennedy
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - P Kim
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, Menlo Park, California 94025, USA
| | - M Kiveni
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - K Koch
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - M Kos
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - S W Leman
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - B Loer
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - E Lopez Asamar
- Departamento de Física Teórica and Instituto de Física Teórica UAM/CSIC, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - R Mahapatra
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - V Mandic
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - C Martinez
- Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - K A McCarthy
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - N Mirabolfathi
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - R A Moffatt
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - D C Moore
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - P Nadeau
- Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - R H Nelson
- Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, California 91125, USA
| | - K Page
- Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - R Partridge
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, Menlo Park, California 94025, USA
| | - M Pepin
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - A Phipps
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - K Prasad
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - M Pyle
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - H Qiu
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - W Rau
- Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - P Redl
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - A Reisetter
- Department of Physics, University of Evansville, Evansville, Indiana 47722, USA
| | - Y Ricci
- Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - T Saab
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - B Sadoulet
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA and Department of Physics, University of California, Berkeley, California 94720, USA
| | - J Sander
- Department of Physics, Texas A&M University, College Station, Texas 77843, USA
| | - K Schneck
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, Menlo Park, California 94025, USA
| | - R W Schnee
- Department of Physics, Syracuse University, Syracuse, New York 13244, USA
| | - S Scorza
- Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA
| | - B Serfass
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - B Shank
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - D Speller
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - K M Sundqvist
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - A N Villano
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - B Welliver
- Department of Physics, University of Florida, Gainesville, Florida 32611, USA
| | - D H Wright
- SLAC National Accelerator Laboratory/Kavli Institute for Particle Astrophysics and Cosmology, Menlo Park, California 94025, USA
| | - S Yellin
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - J J Yen
- Department of Physics, Stanford University, Stanford, California 94305, USA
| | - J Yoo
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - B A Young
- Department of Physics, Santa Clara University, Santa Clara, California 95053, USA
| | - J Zhang
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| |
Collapse
|