Search for B+c → π+μ+μ- decays and measurement of the branching fraction ratio B(B+c → ψ(2S)π+)/B(B+c → J/ψπ+)

被引：0

作者：

Aaij, R. ^{[36
,75
,76
]}

Abdelmotteleb, A. S. W. ^{[54
]}

Beteta, C. Abellan ^{[48
]}

Abudinen, F. ^{[54
]}

Ackernley, T. ^{[58
]}

Adeva, B. ^{[45
]}

Adinolfi, M. ^{[52
]}

Adlarson, P. ^{[78
]}

Agapopoulou, C. ^{[42
,74
]}

Aidala, C. A. ^{[79
]}

Ajaltouni, Z. ^{[11
]}

Akar, S. ^{[63
]}

Akiba, K. ^{[36
,75
,76
]}

Albicocco, P. ^{[25
]}

Albrecht, J. ^{[17
]}

Alessio, F. ^{[42
,74
]}

Alexander, M. ^{[57
,78
]}

Albero, A. Alfonso ^{[44
]}

Aliouche, Z. ^{[60
]}

Cartelle, P. Alvarez ^{[53
]}

Amalric, R. ^{[15
,72
]}

Amato, S. ^{[3
,67
]}

Amey, J. L. ^{[52
]}

Amhis, Y. ^{[13
,42
,74
]}

An, L.

Anderlini, L. ^{[24
]}

Andersson, M. ^{[48
]}

Andreianov, A. ^{[42
,74
]}

Andreola, P. ^{[48
]}

Andreotti, M. ^{[23
]}

Andreou, D. ^{[66
,79
]}

Anelli, A. ^{[28
,95
]}

Ao, D. ^{[7
]}

Archilli, F. ^{[35
,101
]}

Argenton, M. ^{[23
]}

Cuendis, S. Arguedas ^{[9
]}

Artamonov, A. ^{[42
]}

Artuso, M. ^{[66
,79
]}

Aslanides, E. ^{[12
]}

Atzeni, M. ^{[62
]}

Audurier, B. ^{[14
]}

Bacher, D. ^{[61
]}

Perea, I. Bachiller ^{[10
]}

Bachmann, S. ^{[19
,73
]}

Bachmayer, M. ^{[47
]}

Back, J. J. ^{[54
]}

Rodriguez, P. Baladron ^{[45
]}

Balagura, V. ^{[14
]}

Baldini, W. ^{[23
]}

Leite, J. Baptista de Souza ^{[2
]}

机构：

[1] Monash Univ, Sch Phys & Astron, Melbourne, Vic, Australia

[2] Ctr Brasileiro Pesquisas Fis CBPF, Rio De Janeiro, Brazil

[3] Univ Fed Rio de Janeiro UFRJ, Rio De Janeiro, Brazil

[4] Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China

[5] Inst High Energy Phys IHEP, Beijing, Peoples R China

[6] Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing, Peoples R China

[7] Univ Chinese Acad Sci, Beijing, Peoples R China

[8] Cent China Normal Univ, Inst Particle Phys, Wuhan, Hubei, Peoples R China

[9] Consejo Nacl Rectores CONARE, San Jose, Costa Rica

[10] Univ Savoie Mt Blanc, CNRS, IN2P3, LAPP, Annecy, France

[11] Univ Clermont Auvergne, CNRS, IN2P3, LPC, Clermont Ferrand, France

[12] Aix Marseille Univ, CNRS, IN2P3, CPPM, Aix En Provence, France

[13] Univ Paris Saclay, CNRS, IN2P3, IJCLab, Orsay, France

[14] Inst Polytech Paris, Ecole Polytech, CNRS, Lab Leprince Ringuet,IN2P3, Palaiseau, France

[15] Sorbonne Univ, LPNHE, Paris Diderot Sorbonne Paris Cite, CNRS,IN2P3, Paris, France

[16] Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany

[17] Tech Univ Dortmund, Fak Phys, Dortmund, Germany

[18] Max Planck Inst Kernphys MPIK, Heidelberg, Germany

[19] Heidelberg Univ, Phys Inst, Heidelberg, Germany

[20] Univ Coll Dublin, Sch Phys, Dublin, Ireland

[21] INFN Sez Bari, Bari, Italy

[22] INFN Sez Bologna, Bologna, Italy

[23] INFN Sez Ferrara, Ferrara, Italy

[24] INFN Sez Firenze, Florence, Italy

[25] INFN Lab Nazl Frascati, Frascati, Italy

[26] INFN Sez Genova, Genoa, Italy

[27] INFN Sez Milano, Milan, Italy

[28] INFN Sez Milano Bicocca, Milan, Italy

[29] INFN Sez Cagliari, Monserrato, Italy

[30] Univ Padua, Padua, Italy

[31] INFN, Padua, Italy

[32] INFN Sez Perugia, Perugia, Italy

[33] INFN Sez Pisa, Pisa, Italy

[34] INFN Sez Roma La Sapienza, Rome, Italy

[35] INFN Sez Roma Tor Vergata, Rome, Italy

[36] Nikhef Natl Inst Subat Phys, Amsterdam, Netherlands

[37] Vrije Univ Amsterdam, Amsterdam, Netherlands

[38] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Krakow, Poland

[39] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Krakow, Poland

[40] Natl Ctr Nucl Res NCBJ, Warsaw, Poland

[41] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania

[42] CERN, Geneva, Switzerland

[43] Univ Ramon Llull, DS4DS, Barcelona, Spain

[44] Univ Barcelona, ICCUB, Barcelona, Spain

[45] Univ Santiago de Compostela, IGFAE, Santiago De Compostela, Spain

[46] Ctr Mixto Univ Valencia CSIC, Inst Fis Corpuscular, Valencia, Spain

[47] Ecole Polytech Fed Lausanne EPFL, Inst Phys, Lausanne, Switzerland

[48] Univ Zurich, Inst Phys, Zurich, Switzerland

[49] NSC Kharkiv Inst Phys & Technol NSC KIPT, Kharkiv, Ukraine

[50] Natl Acad Sci KINR, Inst Nucl Res, Kyiv, Ukraine

来源：

EUROPEAN PHYSICAL JOURNAL C | 2024年 / 84卷 / 05期

关键词：

LIFETIME;

D O I：

10.1140/epjc/s10052-024-12669-x

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The first search for nonresonant B-c(+) -> pi(+)mu(+)mu(-) decays is reported. The analysis uses proton-proton collision data collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 fb(-1). No evidence for an excess of signal events over background is observed and an upper limit is set on the branching fraction ratio B(B-c(+) -> pi(+)mu(+)mu(-))/B(B-c(+) -> J/psi pi(+)) < 2.1x10(-4) at 90% confidence level. Additionally, an updated measurement of the ratio of the B-c(+) -> psi(2S)pi(+) and B-c(+) -> J/psi pi(+) branching fractions is reported. The ratio B(B-c(+) -> psi(2S)pi+)/B(B-c(+) -> J/psi pi(+)) is measured to be 0.254 +/- 0.018 +/- 0.003 +/- 0.005, where the first uncertainty is statistical, the second systematic, and the third is due to the uncertainties on the branching fractions of the leptonic J/psi and psi(2S) decays. This measurement is the most precise to date and is consistent with previous LHCb results.

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页数：17

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