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Kang ZB, Larkoski AJ, Yang J. Towards a Nonperturbative Formulation of the Jet Charge. PHYSICAL REVIEW LETTERS 2023; 130:151901. [PMID: 37115894 DOI: 10.1103/physrevlett.130.151901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 03/17/2023] [Indexed: 06/19/2023]
Abstract
The jet charge is an old observable that has proven uniquely useful for discrimination of jets initiated by different flavors of light quarks, for example. In this Letter, we propose an approach to understanding the jet charge by establishing simple, robust assumptions that hold to good approximation nonperturbatively, such as isospin conservation and large particle multiplicity in the jets, forgoing any attempt at a perturbative analysis. From these assumptions, the jet charge distribution with fixed particle multiplicity takes the form of a Gaussian by the central limit theorem and whose mean and variance are related to fractional-power moments of single particle energy distributions. These results make several concrete predictions for the scaling of the jet charge with the multiplicity, explaining many of the results already in the literature, and new results we validate in Monte Carlo simulation.
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Affiliation(s)
- Zhong-Bo Kang
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
- Mani L. Bhaumik Institute for Theoretical Physics, University of California, Los Angeles, California 90095, USA
- Center for Frontiers in Nuclear Science, Stony Brook University, Stony Brook, New York 11794, USA
| | - Andrew J Larkoski
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
- Mani L. Bhaumik Institute for Theoretical Physics, University of California, Los Angeles, California 90095, USA
| | - Jinghong Yang
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
- Department of Physics, University of Maryland, College Park, Maryland 20742, USA
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Abe K, Abe K, Abe T, Adam I, Akimoto H, Aston D, Baird KG, Baltay C, Band HR, Barklow TL, Bauer JM, Bellodi G, Berger R, Blaylock G, Bogart JR, Bower GR, Brau JE, Breidenbach M, Bugg WM, Burke D, Burnett TH, Burrows PN, Calcaterra A, Cassell R, Chou A, Cohn HO, Coller JA, Convery MR, Cook V, Cowan RF, Crawford G, Damerell CJS, Daoudi M, de Groot N, de Sangro R, Dong DN, Doser M, Dubois R, Erofeeva I, Eschenburg V, Fahey S, Falciai D, Fernandez JP, Flood K, Frey R, Hart EL, Hasuko K, Hertzbach SS, Huffer ME, Huynh X, Iwasaki M, Jackson DJ, Jacques P, Jaros JA, Jiang ZY, Johnson AS, Johnson JR, Kajikawa R, Kalelkar M, Kang HJ, Kofler RR, Kroeger RS, Langston M, Leith DWG, Lia V, Lin C, Mancinelli G, Manly S, Mantovani G, Markiewicz TW, Maruyama T, McKemey AK, Messner R, Moffeit KC, Moore TB, Morii M, Muller D, Murzin V, Narita S, Nauenberg U, Neal H, Nesom G, Oishi N, Onoprienko D, Osborne LS, Panvini RS, Park CH, Peruzzi I, Piccolo M, Piemontese L, Plano RJ, Prepost R, Prescott CY, Ratcliff BN, Reidy J, Reinertsen PL, Rochester LS, Rowson PC, Russell JJ, Saxton OH, et alAbe K, Abe K, Abe T, Adam I, Akimoto H, Aston D, Baird KG, Baltay C, Band HR, Barklow TL, Bauer JM, Bellodi G, Berger R, Blaylock G, Bogart JR, Bower GR, Brau JE, Breidenbach M, Bugg WM, Burke D, Burnett TH, Burrows PN, Calcaterra A, Cassell R, Chou A, Cohn HO, Coller JA, Convery MR, Cook V, Cowan RF, Crawford G, Damerell CJS, Daoudi M, de Groot N, de Sangro R, Dong DN, Doser M, Dubois R, Erofeeva I, Eschenburg V, Fahey S, Falciai D, Fernandez JP, Flood K, Frey R, Hart EL, Hasuko K, Hertzbach SS, Huffer ME, Huynh X, Iwasaki M, Jackson DJ, Jacques P, Jaros JA, Jiang ZY, Johnson AS, Johnson JR, Kajikawa R, Kalelkar M, Kang HJ, Kofler RR, Kroeger RS, Langston M, Leith DWG, Lia V, Lin C, Mancinelli G, Manly S, Mantovani G, Markiewicz TW, Maruyama T, McKemey AK, Messner R, Moffeit KC, Moore TB, Morii M, Muller D, Murzin V, Narita S, Nauenberg U, Neal H, Nesom G, Oishi N, Onoprienko D, Osborne LS, Panvini RS, Park CH, Peruzzi I, Piccolo M, Piemontese L, Plano RJ, Prepost R, Prescott CY, Ratcliff BN, Reidy J, Reinertsen PL, Rochester LS, Rowson PC, Russell JJ, Saxton OH, Schalk T, Schumm BA, Schwiening J, Serbo VV, Shapiro G, Sinev NB, Snyder JA, Staengle H, Stahl A, Stamer P, Steiner H, Su D, Suekane F, Sugiyama A, Suzuki S, Swartz M, Taylor FE, Thom J, Torrence E, Usher T, Va'vra J, Verdier R, Wagner DL, Waite AP, Walston S, Weidemann AW, Weiss ER, Whitaker JS, Williams SH, Willocq S, Wilson RJ, Wisniewski WJ, Wittlin JL, Woods M, Wright TR, Yamamoto RK, Yashima J, Yellin SJ, Young CC, Yuta H. Improved direct measurement of the parity-violation parameter Ab using a mass tag and momentum-weighted track charge. PHYSICAL REVIEW LETTERS 2003; 90:141804. [PMID: 12731908 DOI: 10.1103/physrevlett.90.141804] [Show More Authors] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2002] [Indexed: 05/24/2023]
Abstract
We present an improved direct measurement of the parity-violation parameter A(b) in the Z boson-b-quark coupling using a self-calibrating track-charge technique applied to a sample enriched in Z-->bb events via the topological reconstruction of the B hadron mass. Manipulation of the Stanford Linear Collider electron-beam polarization permits the measurement of A(b) to be made independently of other Z-pole coupling parameters. From the 1996-1998 sample of 400,000 hadronic Z decays, produced with an average beam polarization of 73.4%, we find A(b)=0.906+/-0.022(stat)+/-0.023(syst).
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Affiliation(s)
- Kenji Abe
- Nagoya University, Chikusa-ku, Nagoya, 464 Japan
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Abe K, Abt I, Ahn CJ, Akagi T, Ash WW, Aston D, Bacchetta N, Baird KG, Baltay C, Band HR, Barakat MB, Baranko G, Bardon O, Barklow T, Bazarko AO, Ben-David R, Benvenuti AC, Bienz T, Bilei GM, Bisello D, Blaylock G, Bogart JR, Bolton T, Bower GR, Brau JE, Breidenbach M, Bugg WM, Burke D, Burnett TH, Burrows PN, Busza W, Calcaterra A, Caldwell DO, Calloway D, Camanzi B, Carpinelli M, Cassell R, Castaldi R, Castro A, Cavalli-Sforza M, Church E, Cohn HO, Coller JA, Cook V, Cotton R, Cowan RF, Coyne DG, D'Oliveira A, Damerell CJ, Dasu S, Dell'Orso R, Dima M, Du PY, Dubois R, Eisenstein BI, Elia R, Falciai D, Fan C, Fero MJ, Frey R, Furuno K, Gillman T. Measurement of the parity-violation parameters Ab and Ac from the left-right forward-backward asymmetry of leptons in hadronic events at the Z0 resonance. PHYSICAL REVIEW LETTERS 1995; 74:2895-2899. [PMID: 10058052 DOI: 10.1103/physrevlett.74.2895] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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