Precision measurement of the Ξb- baryon lifetime

被引：0

作者：

Aaij, R. ^{[36
]}

Abdelmotteleb, A. S. W. ^{[55
]}

Beteta, C. Abellan ^{[49
]}

Abudinen, F. ^{[55
]}

Ackernley, T. ^{[59
]}

Adefisoye, A. A. ^{[67
]}

Adeva, B. ^{[45
]}

Adinolfi, M. ^{[53
]}

Adlarson, P. ^{[58
,79
]}

Agapopoulou, C. ^{[13
]}

Aidala, C. A. ^{[67
,80
]}

Ajaltouni, Z. ^{[11
]}

Akar, S. ^{[64
]}

Akiba, K. ^{[36
]}

Albicocco, P. ^{[26
]}

Albrecht, J. ^{[18
]}

Alessio, F. ^{[47
]}

Alexander, M. ^{[58
]}

Aliouche, Z. ^{[61
]}

Cartelle, P. Alvarez ^{[54
]}

Amalric, R. ^{[15
]}

Amato, S. ^{[3
]}

Amey, J. L. ^{[53
]}

Amhis, Y. ^{[13
,47
]}

An, L. ^{[6
]}

Anderlini, L. ^{[25
]}

Andersson, M. ^{[49
]}

Andreianov, A. ^{[42
]}

Andreola, P. ^{[49
]}

Andreotti, M. ^{[24
]}

Andreou, D. ^{[67
]}

Anelli, A. ^{[29
,82
]}

Ao, D. ^{[7
]}

Archilli, F. ^{[35
,83
]}

Argenton, M. ^{[24
]}

Arguedas Cuendis, S. ^{[9
]}

Artamonov, A. ^{[42
]}

Artuso, M. ^{[67
]}

Aslanides, E. ^{[12
]}

Atzeni, M. ^{[63
]}

Audurier, B. ^{[14
]}

Bacher, D. ^{[62
]}

Perea, I. Bachiller ^{[10
]}

Bachmann, S. ^{[20
]}

Bachmayer, M. ^{[48
]}

Back, J. J. ^{[55
]}

Baladron Rodriguez, P. ^{[45
]}

Balagura, V. ^{[14
]}

Baldini, W. ^{[24
]}

Bao, H. ^{[7
]}

机构：

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

[2] Ctr Brasileiro Pesquisas Fis, 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, 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, Marseille, 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, Paris Diderot Sorbonne Paris Cite, LPNHE, CNRS,IN2P3, Paris, France

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

[17] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, Bonn, Germany

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

[19] Max Planck Inst Kernphys, Heidelberg, Germany

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

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

[22] INFN, Sez Bari, Bari, Italy

[23] INFN, Sez Bologna, Bologna, Italy

[24] INFN, Sez Ferrara, Ferrara, Italy

[25] INFN, Sez Firenze, Florence, Italy

[26] INFN, Lab Nazl Frascati, Frascati, Italy

[27] INFN, Sez Genova, Genoa, Italy

[28] INFN, Sez Milano, Milan, Italy

[29] INFN, Sez Milano Bicocca, Milan, Italy

[30] INFN, Sez Cagliari, Monserrato, Italy

[31] INFN, Sez Padova, 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 Krakow, 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, Inst Galego Fis Altas Enerxias, Santiago De Compostela, Spain

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

[47] CERN, European Org Nucl Res, Geneva, Switzerland

[48] Ecole Polytech Fed Lausanne, Inst Phys, Lausanne, Switzerland

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

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

来源：

PHYSICAL REVIEW D | 2024年 / 110卷 / 07期

基金：

英国科学技术设施理事会;

关键词：

DECAYS;

D O I：

10.1103/PhysRevD.110.072002

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A sample of pp collision data, corresponding to an integrated luminosity of 5.5 fb(-1) and collected by the LHCb experiment during LHC Run 2, is used to measure the ratio of the lifetime of the Xi(-)(b) baryon to that of the A(b)(0) baryon, r(tau) equivalent to tau(Xi b-)/tau(Ab0). The value r(tau)= 1.076 +/- 0.013 +/- 0.006 is obtained, where the first uncertainty is statistical and the second systematic. This value is averaged with the corresponding value from Run 1 to obtain r(tau)(Rrun 1,2) = 1.078 +/- 0.012 +/- 0.007. Multiplying by the world -average value of the A(b)(0) lifetime yields r(Xi b-)(Rrun 1,2) = 1.578 +/- 0.018 +/- 0.010 +/- 0.011 ps, where the uncertainties are statistical, systematic, and due to the limited knowledge of the A(b)(0), lifetime. This measurement improves the precision of the current world average of the Xi(-)(b) lifetime by about a factor of 2, and is in good agreement with the most recent theoretical predictions.

引用

页数：16

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