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Care O, Bernstein MJ, Chapman M, Diaz Reviriego I, Dressler G, Felipe-Lucia MR, Friis C, Graham S, Hänke H, Haider LJ, Hernández-Morcillo M, Hoffmann H, Kernecker M, Nicol P, Piñeiro C, Pitt H, Schill C, Seufert V, Shu K, Valencia V, Zaehringer JG. Creating leadership collectives for sustainability transformations. Sustain Sci 2021; 16:703-708. [PMID: 33686348 PMCID: PMC7929730 DOI: 10.1007/s11625-021-00909-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 01/08/2021] [Indexed: 06/12/2023]
Abstract
UNLABELLED Enduring sustainability challenges requires a new model of collective leadership that embraces critical reflection, inclusivity and care. Leadership collectives can support a move in academia from metrics to merits, from a focus on career to care, and enact a shift from disciplinary to inter- and trans-disciplinary research. Academic organisations need to reorient their training programs, work ethics and reward systems to encourage collective excellence and to allow space for future leaders to develop and enact a radically re-imagined vision of how to lead as a collective with care for people and the planet. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s11625-021-00909-y.
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Affiliation(s)
- O. Care
- The Careoperative, Berlin, Germany
| | - M. J. Bernstein
- School for the Future of Innovation in Society, Arizona State University, Tempe, AZ 85281 USA
| | - M. Chapman
- Department of Geography and URPP Global Change and Biodiversity, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - I. Diaz Reviriego
- Faculty of Sustainability, Leuphana University of Lüneburg, Universitätsallee 1, 21335 Lüneburg, Germany
| | - G. Dressler
- Department of Ecological Modelling, Helmholtz Centre for Environmental Research–UFZ, Permoserstr. 15, 04318 Leipzig, Germany
- Institute of Environmental Systems Research, University of Osnabrück, Barbarastr. 12, 49076 Osnabrück, Germany
| | - M. R. Felipe-Lucia
- Department of Ecosystem Services, Helmholtz Centre for Environmental Research–UFZ, Puschstrasse 4, 04103 Leipzig, Germany
- Department of Ecosystem Services, German Center for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, 04103 Leipzig, Germany
| | - C. Friis
- IRI THESys, Humboldt-Universität Zu Berlin, Unter den Linden 6, 10099 Berlin, Germany
- Section for Geography, Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, 1350 Copenhagen K, Denmark
| | - S. Graham
- School of Geography and Sustainable Communities, University of Wollongong, Wollongong, 2522 Australia
| | - H. Hänke
- Department of Agricultural Economics and Rural Development, University of Goettingen, Platz der Göttinger Sieben 5, 37073 Göttingen, Germany
| | - L. J. Haider
- Stockholm Resilience Centre, Stockholm University, 106 91 Stockholm, Sweden
| | - M. Hernández-Morcillo
- Faculty of Forest and Environment, Eberswalde University for Sustainable Development, Alfred Möller Straße 1, 16225 Eberswalde, Germany
| | - H. Hoffmann
- Leibniz Centre for Agricultural Landscape Research (ZALF), Eberswalder Straße 84, 15374 Müncheberg, Germany
| | - M. Kernecker
- Leibniz Centre for Agricultural Landscape Research (ZALF), Eberswalder Straße 84, 15374 Müncheberg, Germany
| | - P. Nicol
- Sustainable Places Research Institute Cardiff University, 33 Park Place Cardiff, Wales, CF10 3BA UK
| | - C. Piñeiro
- Altekio S.Coop.Mad, Paseo de Las Acacias, 3, 1a, 28005 Madrid, Spain
| | - H. Pitt
- Sustainable Places Research Institute Cardiff University, 33 Park Place Cardiff, Wales, CF10 3BA UK
| | - C. Schill
- Stockholm Resilience Centre, Stockholm University, 106 91 Stockholm, Sweden
- Beijer Institute of Ecological Economics, Royal Swedish Academy of Sciences, Stockholm, Sweden
| | - V. Seufert
- Institute for Environmental Studies (IVM), Vrije Universiteit Amsterdam, De Boelelaan 1111, 1081 HV Amsterdam, The Netherlands
| | - K. Shu
- Institute of Soil Science and Plant Cultivation State Research Institute, Czartoryskich 8 Street, 24-100 Puławy, Poland
| | - V. Valencia
- Farming Systems Ecology Group, Wageningen University and Research, 6700AK Wageningen, The Netherlands
| | - J. G. Zaehringer
- Centre for Development and Environment, University of Bern, Mittelstrasse 43, 3012 Bern, Switzerland
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Adolph C, Akhunzyanov R, Alexeev MG, Alexeev GD, Amoroso A, Andrieux V, Anosov V, Austregesilo A, Badełek B, Balestra F, Barth J, Baum G, Beck R, Bedfer Y, Berlin A, Bernhard J, Bicker K, Bieling J, Birsa R, Bisplinghoff J, Bodlak M, Boer M, Bordalo P, Bradamante F, Braun C, Bressan A, Büchele M, Burtin E, Capozza L, Chiosso M, Chung SU, Cicuttin A, Colantoni M, Crespo ML, Curiel Q, Dalla Torre S, Dasgupta SS, Dasgupta S, Denisov OY, Dinkelbach AM, Donskov SV, Doshita N, Duic V, Dünnweber W, Dziewiecki M, Efremov A, Elia C, Eversheim PD, Eyrich W, Faessler M, Ferrero A, Filin A, Finger M, Finger M, Fischer H, Franco C, du Fresne von Hohenesche N, Friedrich JM, Frolov V, Gautheron F, Gavrichtchouk OP, Gerassimov S, Geyer R, Gnesi I, Gobbo B, Goertz S, Gorzellik M, Grabmüller S, Grasso A, Grube B, Grussenmeyer T, Guskov A, Guthörl T, Haas F, von Harrach D, Hahne D, Hashimoto R, Heinsius FH, Herrmann F, Hinterberger F, Höppner C, Horikawa N, d'Hose N, Huber S, Ishimoto S, Ivanov A, Ivanshin Y, Iwata T, Jahn R, Jary V, Jasinski P, Jörg P, Joosten R, Kabuss E, Ketzer B, Khaustov GV, Khokhlov YA, Kisselev Y, Klein F, Klimaszewski K, Koivuniemi JH, Kolosov VN, Kondo K, Königsmann K, Konorov I, Konstantinov VF, Kotzinian AM, Kouznetsov O, Krämer M, Kroumchtein ZV, Kuchinski N, Kuhn R, Kunne F, Kurek K, Kurjata RP, Lednev AA, Lehmann A, Levillain M, Levorato S, Lichtenstadt J, Maggiora A, Magnon A, Makke N, Mallot GK, Marchand C, Martin A, Marzec J, Matousek J, Matsuda H, Matsuda T, Meshcheryakov G, Meyer W, Michigami T, Mikhailov YV, Miyachi Y, Moinester MA, Nagaytsev A, Nagel T, Nerling F, Neubert S, Neyret D, Nikolaenko VI, Novy J, Nowak WD, Nunes AS, Olshevsky AG, Orlov I, Ostrick M, Panknin R, Panzieri D, Parsamyan B, Paul S, Peshekhonov D, Platchkov S, Pochodzalla J, Polyakov VA, Pretz J, Quaresma M, Quintans C, Ramos S, Regali C, Reicherz G, Rocco E, Rossiyskaya NS, Ryabchikov DI, Rychter A, Samoylenko VD, Sandacz A, Sarkar S, Savin IA, Sbrizzai G, Schiavon P, Schill C, Schlüter T, Schmidt K, Schmieden H, Schönning K, Schopferer S, Schott M, Shevchenko OY, Silva L, Sinha L, Sirtl S, Slunecka M, Sosio S, Sozzi F, Srnka A, Steiger L, Stolarski M, Sulc M, Sulej R, Suzuki H, Szabelski A, Szameitat T, Sznajder P, Takekawa S, ter Wolbeek J, Tessaro S, Tessarotto F, Thibaud F, Uhl S, Uman I, Virius M, Wang L, Weisrock T, Wilfert M, Windmolders R, Wollny H, Zaremba K, Zavertyaev M, Zemlyanichkina E, Ziembicki M, Zink A. Measurement of the charged-pion polarizability. Phys Rev Lett 2015; 114:062002. [PMID: 25723208 DOI: 10.1103/physrevlett.114.062002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Indexed: 06/04/2023]
Abstract
The COMPASS collaboration at CERN has investigated pion Compton scattering, π(-)γ→π(-)γ, at center-of-mass energy below 3.5 pion masses. The process is embedded in the reaction π(-)Ni→π(-)γNi, which is initiated by 190 GeV pions impinging on a nickel target. The exchange of quasireal photons is selected by isolating the sharp Coulomb peak observed at smallest momentum transfers, Q(2)<0.0015 (GeV/c)(2). From a sample of 63,000 events, the pion electric polarizability is determined to be α(π)=(2.0±0.6(stat)±0.7(syst))×10(-4) fm(3) under the assumption α(π)=-β(π), which relates the electric and magnetic dipole polarizabilities. It is the most precise measurement of this fundamental low-energy parameter of strong interaction that has been addressed since long by various methods with conflicting outcomes. While this result is in tension with previous dedicated measurements, it is found in agreement with the expectation from chiral perturbation theory. An additional measurement replacing pions by muons, for which the cross-section behavior is unambiguously known, was performed for an independent estimate of the systematic uncertainty.
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Affiliation(s)
- C Adolph
- Universität Erlangen-Nürnberg, Physikalisches Institut, 91054 Erlangen, Germany
| | - R Akhunzyanov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - M G Alexeev
- University of Turin, Department of Physics, 10125 Turin, Italy
| | - G D Alexeev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - A Amoroso
- University of Turin, Department of Physics, 10125 Turin, Italy and Torino Section of INFN, 10125 Turin, Italy
| | - V Andrieux
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
| | - V Anosov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - A Austregesilo
- CERN, 1211 Geneva 23, Switzerland and Technische Universität München, Physik Department, 85748 Garching, Germany
| | - B Badełek
- University of Warsaw, Faculty of Physics, 00-681 Warsaw, Poland
| | - F Balestra
- University of Turin, Department of Physics, 10125 Turin, Italy and Torino Section of INFN, 10125 Turin, Italy
| | - J Barth
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany
| | - G Baum
- Universität Bielefeld, Fakultät für Physik, 33501 Bielefeld, Germany
| | - R Beck
- Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany
| | - Y Bedfer
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
| | - A Berlin
- Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany
| | - J Bernhard
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
| | - K Bicker
- CERN, 1211 Geneva 23, Switzerland and Technische Universität München, Physik Department, 85748 Garching, Germany
| | - J Bieling
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany
| | - R Birsa
- Trieste Section of INFN, 34127 Trieste, Italy
| | - J Bisplinghoff
- Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany
| | - M Bodlak
- Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic
| | - M Boer
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
| | | | - F Bradamante
- University of Trieste, Department of Physics, 34127 Trieste, Italy and Trieste Section of INFN, 34127 Trieste, Italy
| | - C Braun
- Universität Erlangen-Nürnberg, Physikalisches Institut, 91054 Erlangen, Germany
| | - A Bressan
- University of Trieste, Department of Physics, 34127 Trieste, Italy and Trieste Section of INFN, 34127 Trieste, Italy
| | - M Büchele
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
| | - E Burtin
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
| | - L Capozza
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
| | - M Chiosso
- University of Turin, Department of Physics, 10125 Turin, Italy and Torino Section of INFN, 10125 Turin, Italy
| | - S U Chung
- Technische Universität München, Physik Department, 85748 Garching, Germany
| | - A Cicuttin
- Trieste Section of INFN, 34127 Trieste, Italy and Abdus Salam ICTP, 34151 Trieste, Italy
| | | | - M L Crespo
- Trieste Section of INFN, 34127 Trieste, Italy and Abdus Salam ICTP, 34151 Trieste, Italy
| | - Q Curiel
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
| | | | - S S Dasgupta
- Matrivani Institute of Experimental Research & Education, Calcutta 700 030, India
| | - S Dasgupta
- Trieste Section of INFN, 34127 Trieste, Italy
| | | | - A M Dinkelbach
- Technische Universität München, Physik Department, 85748 Garching, Germany
| | - S V Donskov
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - N Doshita
- Yamagata University, Yamagata, 992-8510 Japan
| | - V Duic
- University of Trieste, Department of Physics, 34127 Trieste, Italy
| | - W Dünnweber
- Ludwig-Maximilians-Universität München, Department für Physik, 80799 Munich, Germany
| | - M Dziewiecki
- Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland
| | - A Efremov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - C Elia
- University of Trieste, Department of Physics, 34127 Trieste, Italy and Trieste Section of INFN, 34127 Trieste, Italy
| | - P D Eversheim
- Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany
| | - W Eyrich
- Universität Erlangen-Nürnberg, Physikalisches Institut, 91054 Erlangen, Germany
| | - M Faessler
- Ludwig-Maximilians-Universität München, Department für Physik, 80799 Munich, Germany
| | - A Ferrero
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
| | - A Filin
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - M Finger
- Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic
| | - M Finger
- Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic
| | - H Fischer
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
| | | | | | - J M Friedrich
- Technische Universität München, Physik Department, 85748 Garching, Germany
| | - V Frolov
- CERN, 1211 Geneva 23, Switzerland
| | - F Gautheron
- Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany
| | - O P Gavrichtchouk
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - S Gerassimov
- Lebedev Physical Institute, 119991 Moscow, Russia and Technische Universität München, Physik Department, 85748 Garching, Germany
| | - R Geyer
- Ludwig-Maximilians-Universität München, Department für Physik, 80799 Munich, Germany
| | - I Gnesi
- University of Turin, Department of Physics, 10125 Turin, Italy and Torino Section of INFN, 10125 Turin, Italy
| | - B Gobbo
- Trieste Section of INFN, 34127 Trieste, Italy
| | - S Goertz
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany
| | - M Gorzellik
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
| | - S Grabmüller
- Technische Universität München, Physik Department, 85748 Garching, Germany
| | - A Grasso
- University of Turin, Department of Physics, 10125 Turin, Italy and Torino Section of INFN, 10125 Turin, Italy
| | - B Grube
- Technische Universität München, Physik Department, 85748 Garching, Germany
| | - T Grussenmeyer
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
| | - A Guskov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - T Guthörl
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
| | - F Haas
- Technische Universität München, Physik Department, 85748 Garching, Germany
| | - D von Harrach
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
| | - D Hahne
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany
| | - R Hashimoto
- Yamagata University, Yamagata, 992-8510 Japan
| | - F H Heinsius
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
| | - F Herrmann
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
| | - F Hinterberger
- Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany
| | - Ch Höppner
- Technische Universität München, Physik Department, 85748 Garching, Germany
| | | | - N d'Hose
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
| | - S Huber
- Technische Universität München, Physik Department, 85748 Garching, Germany
| | - S Ishimoto
- Yamagata University, Yamagata, 992-8510 Japan
| | - A Ivanov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - Yu Ivanshin
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - T Iwata
- Yamagata University, Yamagata, 992-8510 Japan
| | - R Jahn
- Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany
| | - V Jary
- Czech Technical University in Prague, 16636 Prague, Czech Republic
| | - P Jasinski
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
| | - P Jörg
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
| | - R Joosten
- Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany
| | - E Kabuss
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
| | - B Ketzer
- Technische Universität München, Physik Department, 85748 Garching, Germany
| | - G V Khaustov
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - Yu A Khokhlov
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - Yu Kisselev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - F Klein
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany
| | - K Klimaszewski
- National Centre for Nuclear Research, 00-681 Warsaw, Poland
| | - J H Koivuniemi
- Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany
| | - V N Kolosov
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - K Kondo
- Yamagata University, Yamagata, 992-8510 Japan
| | - K Königsmann
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
| | - I Konorov
- Lebedev Physical Institute, 119991 Moscow, Russia and Technische Universität München, Physik Department, 85748 Garching, Germany
| | - V F Konstantinov
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - A M Kotzinian
- University of Turin, Department of Physics, 10125 Turin, Italy and Torino Section of INFN, 10125 Turin, Italy
| | - O Kouznetsov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - M Krämer
- Technische Universität München, Physik Department, 85748 Garching, Germany
| | - Z V Kroumchtein
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - N Kuchinski
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - R Kuhn
- Technische Universität München, Physik Department, 85748 Garching, Germany
| | - F Kunne
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
| | - K Kurek
- National Centre for Nuclear Research, 00-681 Warsaw, Poland
| | - R P Kurjata
- Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland
| | - A A Lednev
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - A Lehmann
- Universität Erlangen-Nürnberg, Physikalisches Institut, 91054 Erlangen, Germany
| | - M Levillain
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
| | - S Levorato
- Trieste Section of INFN, 34127 Trieste, Italy
| | - J Lichtenstadt
- Tel Aviv University, School of Physics and Astronomy, 69978 Tel Aviv, Israel
| | - A Maggiora
- Torino Section of INFN, 10125 Turin, Italy
| | - A Magnon
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
| | - N Makke
- University of Trieste, Department of Physics, 34127 Trieste, Italy and Trieste Section of INFN, 34127 Trieste, Italy
| | | | - C Marchand
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
| | - A Martin
- University of Trieste, Department of Physics, 34127 Trieste, Italy and Trieste Section of INFN, 34127 Trieste, Italy
| | - J Marzec
- Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland
| | - J Matousek
- Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic
| | - H Matsuda
- Yamagata University, Yamagata, 992-8510 Japan
| | - T Matsuda
- University of Miyazaki, Miyazaki 889-2192, Japan
| | - G Meshcheryakov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - W Meyer
- Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany
| | - T Michigami
- Yamagata University, Yamagata, 992-8510 Japan
| | - Yu V Mikhailov
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - Y Miyachi
- Yamagata University, Yamagata, 992-8510 Japan
| | - M A Moinester
- Tel Aviv University, School of Physics and Astronomy, 69978 Tel Aviv, Israel
| | - A Nagaytsev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - T Nagel
- Technische Universität München, Physik Department, 85748 Garching, Germany
| | - F Nerling
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
| | - S Neubert
- Technische Universität München, Physik Department, 85748 Garching, Germany
| | - D Neyret
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
| | - V I Nikolaenko
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - J Novy
- Czech Technical University in Prague, 16636 Prague, Czech Republic
| | - W-D Nowak
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
| | | | - A G Olshevsky
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - I Orlov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - M Ostrick
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
| | - R Panknin
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany
| | - D Panzieri
- University of Eastern Piedmont, 15100 Alessandria, Italy and Torino Section of INFN, 10125 Turin, Italy
| | - B Parsamyan
- University of Turin, Department of Physics, 10125 Turin, Italy and Torino Section of INFN, 10125 Turin, Italy
| | - S Paul
- Technische Universität München, Physik Department, 85748 Garching, Germany
| | - D Peshekhonov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - S Platchkov
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
| | - J Pochodzalla
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
| | - V A Polyakov
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - J Pretz
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany
| | | | | | - S Ramos
- LIP, 1000-149 Lisbon, Portugal
| | - C Regali
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
| | - G Reicherz
- Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany
| | - E Rocco
- CERN, 1211 Geneva 23, Switzerland
| | - N S Rossiyskaya
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - D I Ryabchikov
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - A Rychter
- Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland
| | - V D Samoylenko
- State Scientific Center Institute for High Energy Physics of National Research Center "Kurchatov Institute," 142281 Protvino, Russia
| | - A Sandacz
- National Centre for Nuclear Research, 00-681 Warsaw, Poland
| | - S Sarkar
- Matrivani Institute of Experimental Research & Education, Calcutta 700 030, India
| | - I A Savin
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - G Sbrizzai
- University of Trieste, Department of Physics, 34127 Trieste, Italy and Trieste Section of INFN, 34127 Trieste, Italy
| | - P Schiavon
- University of Trieste, Department of Physics, 34127 Trieste, Italy and Trieste Section of INFN, 34127 Trieste, Italy
| | - C Schill
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
| | - T Schlüter
- Ludwig-Maximilians-Universität München, Department für Physik, 80799 Munich, Germany
| | - K Schmidt
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
| | - H Schmieden
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany
| | | | - S Schopferer
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
| | - M Schott
- CERN, 1211 Geneva 23, Switzerland
| | - O Yu Shevchenko
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - L Silva
- LIP, 1000-149 Lisbon, Portugal
| | - L Sinha
- Matrivani Institute of Experimental Research & Education, Calcutta 700 030, India
| | - S Sirtl
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
| | - M Slunecka
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - S Sosio
- University of Turin, Department of Physics, 10125 Turin, Italy and Torino Section of INFN, 10125 Turin, Italy
| | - F Sozzi
- Trieste Section of INFN, 34127 Trieste, Italy
| | - A Srnka
- Institute of Scientific Instruments, AS CR, 61264 Brno, Czech Republic
| | - L Steiger
- Trieste Section of INFN, 34127 Trieste, Italy
| | | | - M Sulc
- Technical University in Liberec, 46117 Liberec, Czech Republic
| | - R Sulej
- National Centre for Nuclear Research, 00-681 Warsaw, Poland
| | - H Suzuki
- Yamagata University, Yamagata, 992-8510 Japan
| | - A Szabelski
- National Centre for Nuclear Research, 00-681 Warsaw, Poland
| | - T Szameitat
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
| | - P Sznajder
- National Centre for Nuclear Research, 00-681 Warsaw, Poland
| | - S Takekawa
- University of Turin, Department of Physics, 10125 Turin, Italy and Torino Section of INFN, 10125 Turin, Italy
| | - J ter Wolbeek
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
| | - S Tessaro
- Trieste Section of INFN, 34127 Trieste, Italy
| | | | - F Thibaud
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
| | - S Uhl
- Technische Universität München, Physik Department, 85748 Garching, Germany
| | - I Uman
- Ludwig-Maximilians-Universität München, Department für Physik, 80799 Munich, Germany
| | - M Virius
- Czech Technical University in Prague, 16636 Prague, Czech Republic
| | - L Wang
- Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany
| | - T Weisrock
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
| | - M Wilfert
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
| | - R Windmolders
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany
| | - H Wollny
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
| | - K Zaremba
- Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland
| | - M Zavertyaev
- Lebedev Physical Institute, 119991 Moscow, Russia
| | - E Zemlyanichkina
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
| | - M Ziembicki
- Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland
| | - A Zink
- Universität Erlangen-Nürnberg, Physikalisches Institut, 91054 Erlangen, Germany
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Adolph C, Alekseev MG, Alexakhin VY, Alexandrov Y, Alexeev GD, Amoroso A, Antonov AA, Austregesilo A, Badełek B, Balestra F, Barth J, Baum G, Bedfer Y, Bernhard J, Bertini R, Bettinelli M, Bicker KA, Birsa R, Bisplinghoff J, Bordalo P, Bradamante F, Braun C, Bravar A, Bressan A, Burtin E, Chaberny D, Chiosso M, Chung SU, Cicuttin A, Crespo ML, Dalla Torre S, Das S, Dasgupta SS, Denisov OY, Dhara L, Donskov SV, Doshita N, Duic V, Dünnweber W, Dziewiecki M, Efremov A, Elia C, Eversheim PD, Eyrich W, Faessler M, Ferrero A, Filin A, Finger M, Finger M, Fischer H, Franco C, du Fresne von Hohenesche N, Friedrich JM, Garfagnini R, Gautheron F, Gavrichtchouk OP, Gazda R, Gerassimov S, Geyer R, Giorgi M, Gnesi I, Gobbo B, Goertz S, Grabmüller S, Grasso A, Grube B, Gushterski R, Guskov A, Haas F, von Harrach D, Hasegawa T, Heinsius FH, Herrmann F, Hess C, Hinterberger F, Horikawa N, Höppner C, d'Hose N, Huber S, Ishimoto S, Ivanov O, Ivanshin Y, Iwata T, Jahn R, Jasinski P, Jegou G, Joosten R, Kabuss E, Kang D, Ketzer B, Khaustov GV, Khokhlov YA, Kisselev Y, Klein F, Klimaszewski K, Koblitz S, Koivuniemi JH, Kolosov VN, Kondo K, Königsmann K, Konorov I, Konstantinov VF, Korzenev A, Kotzinian AM, Kouznetsov O, Krämer M, Kroumchtein ZV, Kunne F, Kurek K, Lauser L, Lednev AA, Lehmann A, Levorato S, Lichtenstadt J, Maggiora A, Magnon A, Makke N, Mallot GK, Mann A, Marchand C, Martin A, Marzec J, Massmann F, Matsuda T, Meyer W, Michigami T, Mikhailov YV, Moinester MA, Morreale A, Mutter A, Nagaytsev A, Nagel T, Nerling F, Neubert S, Neyret D, Nikolaenko VI, Nowak WD, Nunes AS, Olshevsky AG, Ostrick M, Padee A, Panknin R, Panzieri D, Parsamyan B, Paul S, Perevalova E, Pesaro G, Peshekhonov DV, Piragino G, Platchkov S, Pochodzalla J, Polak J, Polyakov VA, Pontecorvo G, Pretz J, Quintans C, Rajotte JF, Ramos S, Rapatsky V, Reicherz G, Richter A, Rocco E, Rondio E, Rossiyskaya NS, Ryabchikov DI, Samoylenko VD, Sandacz A, Sapozhnikov MG, Sarkar S, Savin IA, Sbrizzai G, Schiavon P, Schill C, Schlüter T, Schmitt L, Schönning K, Schopferer S, Schröder W, Shevchenko OY, Siebert HW, Silva L, Sinha L, Sissakian AN, Slunecka M, Smirnov GI, Sosio S, Sozzi F, Srnka A, Stolarski M, Sulc M, Sulej R, Sznajder P, Takekawa S, Ter Wolbeek J, Tessaro S, Tessarotto F, Teufel A, Tkatchev LG, Uhl S, Uman I, Vandenbroucke M, Virius M, Vlassov NV, Windmolders R, Wiślicki W, Wollny H, Zaremba K, Zavertyaev M, Zemlyanichkina E, Ziembicki M, Zhuravlev N, Zvyagin A. First measurement of chiral dynamics in π- γ → π- π- π+. Phys Rev Lett 2012; 108:192001. [PMID: 23003028 DOI: 10.1103/physrevlett.108.192001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2011] [Indexed: 06/01/2023]
Abstract
The COMPASS Collaboration at CERN has investigated the π- γ → π- π- π+ reaction at center-of-momentum energy below five pion masses, sqrt[s]<5m(π), embedded in the Primakoff reaction of 190 GeV pions impinging on a lead target. Exchange of quasireal photons is selected by isolating the sharp Coulomb peak observed at smallest momentum transfers, t'<0.001 GeV2/c2. Using partial-wave analysis techniques, the scattering intensity of Coulomb production described in terms of chiral dynamics and its dependence on the 3π-invariant mass m(3π)=sqrt[s] were extracted. The absolute cross section was determined in seven bins of sqrt[s] with an overall precision of 20%. At leading order, the result is found to be in good agreement with the prediction of chiral perturbation theory over the whole energy range investigated.
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Affiliation(s)
- C Adolph
- Universität Erlangen-Nürnberg, Physikalisches Institut, 91054 Erlangen, Germany
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Alekseev MG, Alexakhin VY, Alexandrov Y, Alexeev GD, Amoroso A, Austregesilo A, Badełek B, Balestra F, Ball J, Barth J, Baum G, Bedfer Y, Bernhard J, Bertini R, Bettinelli M, Birsa R, Bisplinghoff J, Bordalo P, Bradamante F, Bravar A, Bressan A, Brona G, Burtin E, Bussa MP, Chapiro A, Chiosso M, Chung SU, Cicuttin A, Colantoni M, Crespo ML, Dalla Torre S, Dafni T, Das S, Dasgupta SS, Denisov OY, Dhara L, Diaz V, Dinkelbach AM, Donskov SV, Doshita N, Duic V, Dünnweber W, Efremov A, El Alaoui A, Eversheim PD, Eyrich W, Faessler M, Ferrero A, Finger M, Finger M, Fischer H, Franco C, Friedrich JM, Garfagnini R, Gautheron F, Gavrichtchouk OP, Gazda R, Gerassimov S, Geyer R, Giorgi M, Gobbo B, Goertz S, Grabmüller S, Grajek OA, Grasso A, Grube B, Gushterski R, Guskov A, Haas F, von Harrach D, Hasegawa T, Heckmann J, Heinsius FH, Hermann R, Herrmann F, Hess C, Hinterberger F, Horikawa N, Höppner C, d'Hose N, Ilgner C, Ishimoto S, Ivanov O, Ivanshin Y, Iwata T, Jahn R, Jasinski P, Jegou G, Joosten R, Kabuss E, Kang D, Ketzer B, Khaustov GV, Khokhlov YA, Kisselev Y, Klein F, Klimaszewski K, Koblitz S, Koivuniemi JH, Kolosov VN, Komissarov EV, Kondo K, Königsmann K, Konopka R, Konorov I, Konstantinov VF, Korzenev A, Kotzinian AM, Kouznetsov O, Kowalik K, Krämer M, Kral A, Kroumchtein ZV, Kuhn R, Kunne F, Kurek K, Lauser L, Le Goff JM, Lednev AA, Lehmann A, Levorato S, Lichtenstadt J, Liska T, Maggiora A, Maggiora M, Magnon A, Mallot GK, Mann A, Marchand C, Marroncle J, Martin A, Marzec J, Massmann F, Matsuda T, Maximov AN, Meyer W, Michigami T, Mikhailov YV, Moinester MA, Mutter A, Nagaytsev A, Nagel T, Nassalski J, Negrini T, Nerling F, Neubert S, Neyret D, Nikolaenko VI, Olshevsky AG, Ostrick M, Padee A, Panknin R, Panzieri D, Parsamyan B, Paul S, Pawlukiewicz-Kaminska B, Perevalova E, Pesaro G, Peshekhonov DV, Piragino G, Platchkov S, Pochodzalla J, Polak J, Polyakov VA, Pontecorvo G, Pretz J, Quintans C, Rajotte JF, Ramos S, Rapatsky V, Reicherz G, Reggiani D, Richter A, Robinet F, Rocco E, Rondio E, Ryabchikov DI, Samoylenko VD, Sandacz A, Santos H, Sapozhnikov MG, Sarkar S, Savin IA, Sbrizzai G, Schiavon P, Schill C, Schlüter T, Schmitt L, Schopferer S, Schröder W, Shevchenko OY, Siebert HW, Silva L, Sinha L, Sissakian AN, Slunecka M, Smirnov GI, Sosio S, Sozzi F, Srnka A, Stolarski M, Sulc M, Sulej R, Takekawa S, Tessaro S, Tessarotto F, Teufel A, Tkatchev LG, Uhl S, Uman I, Venugopal G, Virius M, Vlassov NV, Vossen A, Weitzel Q, Windmolders R, Wiślicki W, Wollny H, Zaremba K, Zavertyaev M, Zemlyanichkina E, Ziembicki M, Zhao J, Zhuravlev N, Zvyagin A. Observation of a J(PC)=1-+ exotic resonance in diffractive dissociation of 190 GeV/c π- into π- π- π+. Phys Rev Lett 2010; 104:241803. [PMID: 20867295 DOI: 10.1103/physrevlett.104.241803] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2009] [Indexed: 05/29/2023]
Abstract
The COMPASS experiment at the CERN SPS has studied the diffractive dissociation of negative pions into the π- π- π+ final state using a 190 GeV/c pion beam hitting a lead target. A partial wave analysis has been performed on a sample of 420,000 events taken at values of the squared 4-momentum transfer t' between 0.1 and 1 GeV2/c2. The well-known resonances a1(1260), a2(1320), and π2(1670) are clearly observed. In addition, the data show a significant natural-parity exchange production of a resonance with spin-exotic quantum numbers J(PC)=1-+ at 1.66 GeV/c2 decaying to ρπ. The resonant nature of this wave is evident from the mass-dependent phase differences to the J(PC)=2-+ and 1++ waves. From a mass-dependent fit a resonance mass of (1660±10(-64)(+0)) MeV/c2 and a width of (269±21(-64)(+42)) MeV/c2 are deduced, with an intensity of (1.7±0.2)% of the total intensity.
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Airapetian A, Akopov N, Akopov Z, Amarian M, Ammosov VV, Andrus A, Aschenauer EC, Augustyniak W, Avakian R, Avetissian A, Avetissian E, Bailey P, Balin D, Baturin V, Beckmann M, Belostotski S, Bernreuther S, Bianchi N, Blok HP, Böttcher H, Borissov A, Borysenko A, Bouwhuis M, Brack J, Brüll A, Bryzgalov V, Capitani GP, Chen T, Chiang HC, Ciullo G, Contalbrigo M, Dalpiaz PF, De Leo R, Demey M, De Nardo L, De Sanctis E, Devitsin E, Di Nezza P, Dreschler J, Düren M, Ehrenfried M, Elalaoui-Moulay A, Elbakian G, Ellinghaus F, Elschenbroich U, Fabbri R, Fantoni A, Fechtchenko A, Felawka L, Fox B, Frullani S, Gapienko G, Gapienko V, Garibaldi F, Garrow K, Garutti E, Gaskell D, Gavrilov G, Gharibyan V, Graw G, Grebeniouk O, Greeniaus LG, Gregor IM, Hafidi K, Hartig M, Hasch D, Heesbeen D, Henoch M, Hertenberger R, Hesselink WHA, Hillenbrand A, Hoek M, Holler Y, Hommez B, Iarygin G, Ivanilov A, Izotov A, Jackson HE, Jgoun A, Kaiser R, Kinney E, Kisselev A, Kopytin M, Korotkov V, Kozlov V, Krauss B, Krivokhijine VG, Lagamba L, Lapikás L, Laziev A, Lenisa P, Liebing P, Linden-Levy LA, Lipka K, Lorenzon W, Lu H, Lu J, Lu S, Ma BQ, Maiheu B, Makins NCR, Mao Y, Marianski B, Marukyan H, Masoli F, Mexner V, Meyners N, Mikloukho O, Miller CA, Miyachi Y, Muccifora V, Nagaitsev A, Nappi E, Naryshkin Y, Nass A, Negodaev M, Nowak WD, Oganessyan K, Ohsuga H, Pickert N, Potashov S, Potterveld DH, Raithel M, Reggiani D, Reimer PE, Reischl A, Reolon AR, Riedl C, Rith K, Rosner G, Rostomyan A, Rubacek L, Rubin J, Ryckbosch D, Salomatin Y, Sanjiev I, Savin I, Schäfer A, Schill C, Schnell G, Schüler KP, Seele J, Seidl R, Seitz B, Shanidze R, Shearer C, Shibata TA, Shutov V, Simani MC, Sinram K, Stancari M, Statera M, Steffens E, Steijger JJM, Stenzel H, Stewart J, Stinzing F, Stösslein U, Tait P, Tanaka H, Taroian S, Tchuiko B, Terkulov A, Tkabladze A, Trzcinski A, Tytgat M, Vandenbroucke A, van der Nat PB, van der Steenhoven G, Vetterli MC, Vikhrov V, Vincter MG, Vogel C, Vogt M, Volmer J, Weiskopf C, Wendland J, Wilbert J, Ye Y, Ye Z, Yen S, Zihlmann B, Zupranski P. Measurement of the tensor structure function b1 of the deuteron. Phys Rev Lett 2005; 95:242001. [PMID: 16384369 DOI: 10.1103/physrevlett.95.242001] [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: 06/08/2005] [Indexed: 05/05/2023]
Abstract
The Hermes experiment has investigated the tensor spin structure of the deuteron using the 27.6 GeV/c positron beam of DESY HERA. The use of a tensor-polarized deuteron gas target with only a negligible residual vector polarization enabled the first measurement of the tensor asymmetry A(d)zz and the tensor structure function b(d)1 for average values of the Bjorken variable 0.01< <x> <0.45 and of the negative of the squared four-momentum transfer 0.5 GeV2 < <Q2> <5 GeV2. The quantities A(d)zz and b(d)1 are found to be nonzero. The rise of b(d)1 for decreasing values of x can be interpreted to originate from the same mechanism that leads to nuclear shadowing in unpolarized scattering.
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Affiliation(s)
- A Airapetian
- Yerevan Physics Institute, 375036 Yerevan, Armenia
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Airapetian A, Akopov N, Akopov Z, Amarian M, Andrus A, Aschenauer EC, Augustyniak W, Avakian R, Avetissian A, Avetissian E, Bacchetta A, Bailey P, Balin D, Beckmann M, Belostotski S, Bianchi N, Blok HP, Böttcher H, Borissov A, Borysenko A, Bouwhuis M, Brüll A, Bryzgalov V, Capitani GP, Cappiluppi M, Chen T, Ciullo G, Contalbrigo M, Dalpiaz PF, Leo RD, Demey M, Nardo LD, Sanctis ED, Devitsin E, Nezza PD, Düren M, Ehrenfried M, Elalaoui-Moulay A, Elbakian G, Ellinghaus F, Elschenbroich U, Fabbri R, Fantoni A, Fechtchenko A, Felawka L, Frullani S, Gapienko G, Gapienko V, Garibaldi F, Garrow K, Gavrilov G, Gharibyan V, Grebeniouk O, Gregor IM, Hadjidakis C, Hafidi K, Hartig M, Hasch D, Henoch M, Hesselink WHA, Hillenbrand A, Hoek M, Holler Y, Hommez B, Hristova I, Iarygin G, Ilyichev A, Ivanilov A, Izotov A, Jackson HE, Jgoun A, Kaiser R, Kinney E, Kisselev A, Kobayashi T, Kopytin M, Korotkov V, Kozlov V, Krauss B, Krivokhijine VG, Lagamba L, Lapikás L, Laziev A, Lenisa P, Liebing P, Linden-Levy LA, Lorenzon W, Lu H, Lu J, Lu S, Ma BQ, Maiheu B, Makins NCR, Mao Y, Marianski B, Marukyan H, Masoli F, Mexner V, Meyners N, Michler T, Mikloukho O, Miller CA, Miyachi Y, Muccifora V, Nagaitsev A, Nappi E, Naryshkin Y, Nass A, Negodaev M, Nowak WD, Oganessyan K, Ohsuga H, Osborne A, Pickert N, Potterveld DH, Raithel M, Reggiani D, Reimer PE, Reischl A, Reolon AR, Riedl C, Rith K, Rosner G, Rostomyan A, Rubacek L, Rubin J, Ryckbosch D, Salomatin Y, Sanjiev I, Savin I, Schäfer A, Schill C, Schnell G, Schüler KP, Seele J, Seidl R, Seitz B, Shanidze R, Shearer C, Shibata TA, Shutov V, Sinram K, Sommer W, Stancari M, Statera M, Steffens E, Steijger JJM, Stenzel H, Stewart J, Stinzing F, Tait P, Tanaka H, Taroian S, Tchuiko B, Terkulov A, Trzcinski A, Tytgat M, Vandenbroucke A, van der Nat PB, van der Steenhoven G, van Haarlem Y, Vetterli MC, Vikhrov V, Vincter MG, Vogel C, Volmer J, Wang S, Wendland J, Wilbert J, Smit GY, Ye Y, Ye Z, Yen S, Zihlmann B, Zupranski P. Single-spin asymmetries in semi-inclusive deep-inelastic scattering on a transversely polarized hydrogen target. Phys Rev Lett 2005; 94:012002. [PMID: 15698069 DOI: 10.1103/physrevlett.94.012002] [Citation(s) in RCA: 61] [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: 08/06/2004] [Indexed: 05/24/2023]
Abstract
Single-spin asymmetries for semi-inclusive electroproduction of charged pions in deep-inelastic scattering of positrons are measured for the first time with transverse target polarization. The asymmetry depends on the azimuthal angles of both the pion (phi) and the target spin axis (phi(S)) about the virtual-photon direction and relative to the lepton scattering plane. The extracted Fourier component sin((phi+phi(S))(pi)(UT) is a signal of the previously unmeasured quark transversity distribution, in conjunction with the Collins fragmentation function, also unknown. The component sin((phi-phi(S)(pi)(UT) arises from a correlation between the transverse polarization of the target nucleon and the intrinsic transverse momentum of quarks, as represented by the previously unmeasured Sivers distribution function. Evidence for both signals is observed, but the Sivers asymmetry may be affected by exclusive vector meson production.
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Affiliation(s)
- A Airapetian
- Randall Laboratory of Physics, University of Michigan, Ann Arbor, MI 48109-1120, USA
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Airapetian A, Akopov N, Akopov Z, Amarian M, Ammosov VV, Andrus A, Aschenauer EC, Augustyniak W, Avakian R, Avetissian A, Avetissian E, Bailey P, Baturin V, Baumgarten C, Beckmann M, Belostotski S, Bernreuther S, Bianchi N, Blok HP, Böttcher H, Borissov A, Bouwhuis M, Brack J, Brüll A, Bryzgalov V, Capitani GP, Chiang HC, Ciullo G, Contalbrigo M, Dalpiaz PF, De Leo R, De Nardo L, De Sanctis E, Devitsin E, Di Nezza P, Düren M, Ehrenfried M, Elalaoui-Moulay A, Elbakian G, Ellinghaus F, Elschenbroich U, Ely J, Fabbri R, Fantoni A, Fechtchenko A, Felawka L, Fox B, Franz J, Frullani S, Gärber Y, Gapienko G, Gapienko V, Garibaldi F, Garrow K, Garutti E, Gaskell D, Gavrilov G, Gharibyan V, Graw G, Grebeniouk O, Greeniaus LG, Hafidi K, Hartig M, Hasch D, Heesbeen D, Henoch M, Hertenberger R, Hesselink WHA, Hillenbrand A, Hoek M, Holler Y, Hommez B, Iarygin G, Ivanilov A, Izotov A, Jackson HE, Jgoun A, Kaiser R, Kinney E, Kisselev A, Königsmann K, Kopytin M, Korotkov V, Kozlov V, Krauss B, Krivokhijine VG, Lagamba L, Lapikás L, Laziev A, Lenisa P, Liebing P, Lindemann T, Lipka K, Lorenzon W, Lu J, Maiheu B, Makins NCR, Marianski B, Marukyan H, Masoli F, Mexner V, Meyners N, Mikloukho O, Miller CA, Miyachi Y, Muccifora V, Nagaitsev A, Nappi E, Naryshkin Y, Nass A, Negodaev M, Nowak WD, Oganessyan K, Ohsuga H, Orlandi G, Pickert N, Potashov S, Potterveld DH, Raithel M, Reggiani D, Reimer PE, Reischl A, Reolon AR, Riedl C, Rith K, Rosner G, Rostomyan A, Rubacek L, Ryckbosch D, Salomatin Y, Sanjiev I, Savin I, Scarlett C, Schäfer A, Schill C, Schnell G, Schüler KP, Schwind A, Seele J, Seidl R, Seitz B, Shanidze R, Shearer C, Shibata TA, Shutov V, Simani MC, Sinram K, Stancari M, Statera M, Steffens E, Steijger JJM, Stewart J, Stösslein U, Tait P, Tanaka H, Taroian S, Tchuiko B, Terkulov A, Tkabladze A, Trzcinski A, Tytgat M, Vandenbroucke A, Van Der Nat P, Van Der Steenhoven G, Vetterli MC, Vikhrov V, Vincter MG, Visser J, Vogel C, Vogt M, Volmer J, Weiskopf C, Wendland J, Wilbert J, Ybeles Smit G, Yen S, Zihlmann B, Zohrabian H, Zupranski P. Flavor decomposition of the sea-quark helicity distributions in the nucleon from semiinclusive deep inelastic scattering. Phys Rev Lett 2004; 92:012005. [PMID: 14753985 DOI: 10.1103/physrevlett.92.012005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2003] [Indexed: 05/24/2023]
Abstract
Double-spin asymmetries of semiinclusive cross sections for the production of identified pions and kaons have been measured in deep inelastic scattering of polarized positrons on a polarized deuterium target. Five helicity distributions including those for three sea quark flavors were extracted from these data together with reanalyzed previous data for identified pions from a hydrogen target. These distributions are consistent with zero for all three sea flavors. A recently predicted flavor asymmetry in the polarization of the light quark sea appears to be disfavored by the data.
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Affiliation(s)
- A Airapetian
- Yerevan Physics Institute, 375036 Yerevan, Armenia
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Airapetian A, Akopov N, Akopov Z, Amarian M, Ammosov VV, Aschenauer EC, Avakian H, Avakian R, Avetissian A, Avetissian E, Bailey P, Baturin V, Baumgarten C, Beckmann M, Belostotski S, Bernreuther S, Bianchi N, Blok HP, Böttcher H, Borissov A, Bouhali O, Bouwhuis M, Brack J, Brauksiepe S, Brüll A, Brunn I, Bulten HJ, Capitani GP, Cisbani E, Ciullo G, Court GR, Dalpiaz PF, De Leo R, De Nardo L, De Sanctis E, Devitsin E, de Witt Huberts PKA, Di Nezza P, Düren M, Ehrenfried M, Elbakian G, Ellinghaus F, Elschenbroich U, Ely J, Fabbri R, Fantoni A, Fechtchenko A, Felawka L, Filippone BW, Fischer H, Fox B, Franz J, Frullani S, Gärber Y, Gapienko V, Garibaldi F, Garutti E, Gavrilov G, Gharibyan V, Graw G, Grebeniouk O, Green PW, Greeniaus LG, Gute A, Haeberli W, Hafidi K, Hartig M, Hasch D, Heesbeen D, Heinsius FH, Henoch M, Hertenberger R, Hesselink WHA, Hofman G, Holler Y, Holt RJ, Hommez B, Iarygin G, Izotov A, Jackson HE, Jgoun A, Jung P, Kaiser R, Kinney E, Kisselev A, Kitching P, Königsmann K, Kolster H, Kopytin M, Korotkov V, Kotik E, Kozlov V, Krauss B, Krivokhijine VG, Kyle G, Lagamba L, Laziev A, Lenisa P, Liebing P, Lindemann T, Lorenzon W, Maas A, Makins NCR, Marukyan H, Masoli F, Menden F, Mexner V, Meyners N, Mikloukho O, Miller CA, Muccifora V, Nagaitsev A, Nappi E, Naryshkin Y, Nass A, Negodaeva K, Nowak WD, Oganessyan K, Orlandi G, Podiatchev S, Potashov S, Potterveld DH, Raithel M, Rappoport V, Reggiani D, Reimer P, Reischl A, Reolon AR, Rith K, Rostomyan A, Ryckbosch D, Sakemi Y, Sanjiev I, Sato F, Savin I, Scarlett C, Schäfer A, Schill C, Schmidt F, Schnell G, Schüler KP, Schwind A, Seibert J, Seitz B, Shanidze R, Shibata TA, Shutov V, Simani MC, Sinram K, Stancari M, Steffens E, Steijger JJM, Stewart J, Stösslein U, Suetsugu K, Taroian S, Terkulov A, Tessarin S, Thomas E, Tipton B, Tytgat M, Urciuoli GM, van den Brand JFJ, van der Steenhoven G, van de Vyver R, Vetterli MC, Vikhrov V, Vincter MG, Visser J, Volmer J, Weiskopf C, Wendland J, Wilbert J, Wise T, Yen S, Yoneyama S, Zihlmann B, Zohrabian H. Evidence for quark-hadron duality in the proton spin asymmetry A1. Phys Rev Lett 2003; 90:092002. [PMID: 12689215 DOI: 10.1103/physrevlett.90.092002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2002] [Indexed: 05/24/2023]
Abstract
Spin-dependent lepton-nucleon scattering data have been used to investigate the validity of the concept of quark-hadron duality for the spin asymmetry A1. Longitudinally polarized positrons were scattered off a longitudinally polarized hydrogen target for values of Q2 between 1.2 and 12 GeV2 and values of W2 between 1 and 4 GeV2. The average double-spin asymmetry in the nucleon resonance region is found to agree with that measured in deep-inelastic scattering at the same values of the Bjorken scaling variable x. This finding implies that the description of A1 in terms of quark degrees of freedom is valid also in the nucleon resonance region for values of Q2 above 1.6 GeV2.
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Affiliation(s)
- A Airapetian
- Yerevan Physics Institute, 375036, Yerevan, Armenia
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Airapetian A, Akopov N, Akopov Z, Amarian M, Ammosov VV, Andrus A, Aschenauer EC, Augustyniak W, Avakian R, Avetissian A, Avetissian E, Bailey P, Baturin V, Baumgarten C, Beckmann M, Belostotski S, Bernreuther S, Bianchi N, Blok HP, Böttcher H, Borissov A, Bouwhuis M, Brack J, Brüll A, Brunn I, Capitani GP, Chiang HC, Ciullo G, Contalbrigo M, Court GR, Dalpiaz PF, De Leo R, De Nardo L, De Sanctis E, Devitsin E, Di Nezza P, Düren M, Ehrenfried M, Elalaoui-Moulay A, Elbakian G, Ellinghaus F, Elschenbroich U, Ely J, Fabbri R, Fantoni A, Fechtchenko A, Felawka L, Fox B, Franz J, Frullani S, Gärber Y, Gapienko G, Gapienko V, Garibaldi F, Garutti E, Gaskell D, Gavrilov G, Gharibyan V, Graw G, Grebeniouk O, Greeniaus LG, Haeberli W, Hafidi K, Hartig M, Hasch D, Heesbeen D, Henoch M, Hertenberger R, Hesselink WHA, Hillenbrand A, Holler Y, Hommez B, Iarygin G, Izotov A, Jackson HE, Jgoun A, Kaiser R, Kinney E, Kisselev A, Königsmann K, Kolster H, Kopytin M, Korotkov V, Kozlov V, Krauss B, Krivokhijine VG, Lagamba L, Lapikás L, Laziev A, Lenisa P, Liebing P, Lindemann T, Lorenzon W, Makins NCR, Marukyan H, Masoli F, Menden F, Mexner V, Meyners N, Mikloukho O, Miller CA, Miyachi Y, Muccifora V, Nagaitsev A, Nappi E, Naryshkin Y, Nass A, Negodaeva K, Nowak WD, Oganessyan K, Ohsuga H, Orlandi G, Podiatchev S, Potashov S, Potterveld DH, Raithel M, Reggiani D, Reimer P, Reischl A, Reolon AR, Rith K, Rosner G, Rostomyan A, Ryckbosch D, Sanjiev I, Savin I, Scarlett C, Schäfer A, Schill C, Schnell G, Schüler KP, Schwind A, Seibert J, Seitz B, Shanidze R, Shibata TA, Shutov V, Simani MC, Sinram K, Stancari M, Statera M, Steffens E, Steijger JJM, Stewart J, Stösslein U, Tanaka H, Taroian S, Tchuiko B, Terkulov A, Tessarin S, Thomas E, Tkabladze A, Trzcinski A, Tytgat M, Urciuoli GM, Van Der Nat P, Van Der Steenhoven G, Van De Vyver R, Vetterli MC, Vikhrov V, Vincter MG, Visser J, Vogt M, Volmer J, Weiskopf C, Wendland J, Wilbert J, Wise T, Yen S, Yoneyama S, Zihlmann B, Zohrabian H, Zupranski P. Q2 dependence of nuclear transparency for exclusive rho0 production. Phys Rev Lett 2003; 90:052501. [PMID: 12633347 DOI: 10.1103/physrevlett.90.052501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2002] [Indexed: 05/24/2023]
Abstract
Exclusive coherent and incoherent electroproduction of the rho(0) meson from 1H and 14N targets has been studied at the HERMES experiment as a function of coherence length (l(c)), corresponding to the lifetime of hadronic fluctuations of the virtual photon, and squared four-momentum of the virtual photon (-Q2). The ratio of 14N to 1H cross sections per nucleon, called nuclear transparency, was found to increase (decrease) with increasing l(c) for coherent (incoherent) rho(0) electroproduction. For fixed l(c), a rise of nuclear transparency with Q2 is observed for both coherent and incoherent rho(0) production, which is in agreement with theoretical calculations of color transparency.
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Köhler T, Schill C, Deininger MW, Krahl R, Borchert S, Hasenclever D, Leiblein S, Wagner O, Niederwieser D. High Bad and Bax mRNA expression correlate with negative outcome in acute myeloid leukemia (AML). Leukemia 2002; 16:22-9. [PMID: 11840259 DOI: 10.1038/sj.leu.2402340] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2001] [Accepted: 09/28/2001] [Indexed: 11/09/2022]
Abstract
The search for molecular markers in AML that allow prediction of outcome has recently focused on genes involved in the regulation of programmed cell death (PCD). The aim of our study was to determine whether mRNA levels of Mdm-2, Bcl-2, Bcl-x(L), Bad, and Bax are independent prognostic parameters for outcome. Transcript levels were analyzed by real-time quantitative RT-PCR in 232 samples collected either at diagnosis or following induction chemotherapy (ICT). Multivariate COX regression analysis adjusted for chemotherapy protocol, de novo vs secondary AML, and de novo vs relapsed AML indicated: (1) At diagnosis, high expression of Bad (P = 0.015) and even more so high Bax and Bad levels (P = 0.018) predicted adverse outcome, regardless of the response to ICT. In patients who subsequently failed to enter complete remission (CR), high levels of Bad, Bax and Bax high/Bad high were associated with an increased relative risk (RR) to die from tumor (RR = 5.0 for Bad, 3.4 for Bax and 6.14 for Bax high/Bad high). (2) Following ICT, high expression of Bax (P= 0.005) and high Bcl-2/Bax ratios (P = 0.004) were independent predictors of unfavorable outcome, regardless of response to ICT. We conclude that high levels of Bax and Bad correlate with poor outcome, particularly in patients who do not enter CR and may serve as prognostic markers in AML.
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Affiliation(s)
- T Köhler
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, Division of Molecular Diagnostics, University of Leipzig Medical School, Leipzig, Germany
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