Precision measurement of the Ξ-bbaryon lifetime

LHCb Collaboration

doi:10.1103/PhysRevD.110.072002

Precision measurement of the Ξ^-_bbaryon lifetime

LHCb Collaboration

Science Park 105
University of Warwick
Physik-Institut der Universität Zürich
University of Liverpool
Syracuse University
Universidade de Santiago de Compostela
University of Bristol
SUPA
University of Glasgow
Department of Physics and Astronomy
Uppsala University
Université Paris-Saclay
University of Michigan, Ann Arbor
Clermont-Auvergne University
University of Cincinnati
LNF-INFN
Fakultät Physik
University of Dortmund
European Organization for Nuclear Research
Department of Physics and Astronomy
University of Manchester
University of Cambridge
Sorbonne Université
Instituto de Biofisica da UFRJ
State Key Laboratory of Nuclear Physics and Technology
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
Sezione INFN di Ferrara
INFN Sezione di Milano-Bicocca
University of Milano-Bicocca
University of Chinese Academy of Sciences
INFN Roma Tor Vergata
University of Rome “Tor Vergata”
Consejo Nacional de Rectores (CONARE)
Aix-Marseille Université
Institute of Physics
ENAC-IIC-GEL
Massachusetts Institute of Technology
Ip Paris
University of Oxford
Laboratoire de Physique des Particules
University of Heidelberg

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

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 Ξ-b baryon to that of the Λ0b baryon, rτ ≡ τΞ-b=τΛ0b. The value rτ = 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 rRun1,2τ = 1.078 ± 0.012 ± 0.007. Multiplying by the world-average value of the Λ0b lifetime yields τRun1,2Ξ-b = 1.578 ± 0.018 ± 0.010 ± 0.011 ps, where the uncertainties are statistical, systematic, and due to the limited knowledge of the Λ0b lifetime. This measurement improves the precision of the current world average of the Ξ-b lifetime by about a factor of 2, and is in good agreement with the most recent theoretical predictions.

Original language	English
Article number	072002
Journal	Physical Review D
Volume	110
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.110.072002
Publication status	Published - 1 Oct 2024

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10.1103/PhysRevD.110.072002

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@article{b475606ae7f547e8ac89be64c66acbaa,

title = "Precision measurement of the Ξ-bbaryon lifetime",

abstract = "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 Ξ-b baryon to that of the Λ0b baryon, rτ ≡ τΞ-b=τΛ0b. The value rτ = 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 rRun1,2τ = 1.078 ± 0.012 ± 0.007. Multiplying by the world-average value of the Λ0b lifetime yields τRun1,2Ξ-b = 1.578 ± 0.018 ± 0.010 ± 0.011 ps, where the uncertainties are statistical, systematic, and due to the limited knowledge of the Λ0b lifetime. This measurement improves the precision of the current world average of the Ξ-b lifetime by about a factor of 2, and is in good agreement with the most recent theoretical predictions.",

author = "\{LHCb Collaboration\} and R. Aaij and Abdelmotteleb, \{A. S.W.\} and \{Abellan Beteta\}, C. and F. Abudin{\'e}n and T. Ackernley and Adefisoye, \{A. A.\} and B. Adeva and M. Adinolfi and P. Adlarson and C. Agapopoulou and Aidala, \{C. A.\} and Z. Ajaltouni and S. Akar and K. Akiba and P. Albicocco and J. Albrecht and F. Alessio and M. Alexander and Z. Aliouche and \{Alvarez Cartelle\}, P. and R. Amalric and S. Amato and Amey, \{J. L.\} and Y. Amhis and L. An and L. Anderlini and M. Andersson and A. Andreianov and P. Andreola and M. Andreotti and D. Andreou and A. Anelli and D. Ao and F. Archilli and M. Argenton and \{Arguedas Cuendis\}, S. and A. Artamonov and M. Artuso and E. Aslanides and \{Ataide Da Silva\}, R. and M. Atzeni and B. Audurier and D. Bacher and \{Bachiller Perea\}, I. and S. Bachmann and M. Bachmayer and V. Balagura and F. Fleuret and E. Maurice and Niel, \{E. M.\}",

note = "Publisher Copyright: {\textcopyright} 2024 CERN, for the LHCb Collaboration.",

year = "2024",

month = oct,

day = "1",

doi = "10.1103/PhysRevD.110.072002",

language = "English",

volume = "110",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "7",

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TY - JOUR

T1 - Precision measurement of the Ξ-bbaryon lifetime

AU - LHCb Collaboration

AU - Aaij, R.

AU - Abdelmotteleb, A. S.W.

AU - Abellan Beteta, C.

AU - Abudinén, F.

AU - Ackernley, T.

AU - Adefisoye, A. A.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Adlarson, P.

AU - Agapopoulou, C.

AU - Aidala, C. A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Akiba, K.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Aliouche, Z.

AU - Alvarez Cartelle, P.

AU - Amalric, R.

AU - Amato, S.

AU - Amey, J. L.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andersson, M.

AU - Andreianov, A.

AU - Andreola, P.

AU - Andreotti, M.

AU - Andreou, D.

AU - Anelli, A.

AU - Ao, D.

AU - Archilli, F.

AU - Argenton, M.

AU - Arguedas Cuendis, S.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Ataide Da Silva, R.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bacher, D.

AU - Bachiller Perea, I.

AU - Bachmann, S.

AU - Bachmayer, M.

AU - Balagura, V.

AU - Fleuret, F.

AU - Maurice, E.

AU - Niel, E. M.

PY - 2024/10/1

Y1 - 2024/10/1

N2 - 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 Ξ-b baryon to that of the Λ0b baryon, rτ ≡ τΞ-b=τΛ0b. The value rτ = 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 rRun1,2τ = 1.078 ± 0.012 ± 0.007. Multiplying by the world-average value of the Λ0b lifetime yields τRun1,2Ξ-b = 1.578 ± 0.018 ± 0.010 ± 0.011 ps, where the uncertainties are statistical, systematic, and due to the limited knowledge of the Λ0b lifetime. This measurement improves the precision of the current world average of the Ξ-b lifetime by about a factor of 2, and is in good agreement with the most recent theoretical predictions.

AB - 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 Ξ-b baryon to that of the Λ0b baryon, rτ ≡ τΞ-b=τΛ0b. The value rτ = 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 rRun1,2τ = 1.078 ± 0.012 ± 0.007. Multiplying by the world-average value of the Λ0b lifetime yields τRun1,2Ξ-b = 1.578 ± 0.018 ± 0.010 ± 0.011 ps, where the uncertainties are statistical, systematic, and due to the limited knowledge of the Λ0b lifetime. This measurement improves the precision of the current world average of the Ξ-b lifetime by about a factor of 2, and is in good agreement with the most recent theoretical predictions.

U2 - 10.1103/PhysRevD.110.072002

DO - 10.1103/PhysRevD.110.072002

M3 - Article

AN - SCOPUS:85212397859

SN - 2470-0010

VL - 110

JO - Physical Review D

JF - Physical Review D

IS - 7

M1 - 072002

ER -

Precision measurement of the Ξ-bbaryon lifetime

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Precision measurement of the Ξ^-_bbaryon lifetime