Measurement of the Λb0 lifetime and mass in the ATLAS experiment

Atlas Collaboration

doi:10.1103/PhysRevD.87.032002

Measurement of the Λb0 lifetime and mass in the ATLAS experiment

Atlas Collaboration

Physics

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49 Scopus citations

Abstract

A measurement of the Λb0 lifetime and mass in the decay channel Λb0→J/ψ(μ⁺μ^-)Λ0(pπ ^-) is presented. The analysis uses a signal sample of about 2200 Λb0 and Λ̄b0 decays that are reconstructed in 4.9 fb ^-1 of ATLAS pp collision data collected in 2011 at the LHC center-of-mass energy of 7 TeV. A simultaneous mass and decay time maximum likelihood fit is used to extract the Λb0 lifetime and mass. They are measured to be τ_Λb=1.449±0.036(stat) ±0.017(syst) ps and m_Λb=5619.7±0. 7(stat)±1.1(syst) MeV.

Original language	English (US)
Article number	032002
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	87
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevD.87.032002
State	Published - Feb 4 2013

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.87.032002

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@article{13312a2e688f4166a5249b4d3b02b1ac,

title = "Measurement of the Λb0 lifetime and mass in the ATLAS experiment",

abstract = "A measurement of the Λb0 lifetime and mass in the decay channel Λb0→J/ψ(μ+μ-)Λ0(pπ -) is presented. The analysis uses a signal sample of about 2200 Λb0 and {\=Λ}b0 decays that are reconstructed in 4.9 fb -1 of ATLAS pp collision data collected in 2011 at the LHC center-of-mass energy of 7 TeV. A simultaneous mass and decay time maximum likelihood fit is used to extract the Λb0 lifetime and mass. They are measured to be τΛb=1.449±0.036(stat) ±0.017(syst) ps and mΛb=5619.7±0. 7(stat)±1.1(syst) MeV.",

author = "\{Atlas Collaboration\} and G. Aad and T. Abajyan and B. Abbott and J. Abdallah and \{Abdel Khalek\}, S. and Abdelalim, \{A. A.\} and O. Abdinov and R. Aben and B. Abi and M. Abolins and Abouzeid, \{O. S.\} and H. Abramowicz and H. Abreu and E. Acerbi and Acharya, \{B. S.\} and L. Adamczyk and Adams, \{D. L.\} and Addy, \{T. N.\} and J. Adelman and S. Adomeit and P. Adragna and T. Adye and S. Aefsky and Aguilar-Saavedra, \{J. A.\} and M. Agustoni and M. Aharrouche and Ahlen, \{S. P.\} and F. Ahles and A. Ahmad and M. Ahsan and G. Aielli and T. Akdogan and {\AA}kesson, \{T. P.A.\} and G. Akimoto and Akimov, \{A. V.\} and Alam, \{M. S.\} and Alam, \{M. A.\} and J. Albert and S. Albrand and M. Aleksa and Aleksandrov, \{I. N.\} and F. Alessandria and C. Alexa and G. Alexander and G. Alexandre and E. Cheu and Johns, \{K. A.\} and P. Loch and Rutherfoord, \{J. P.\} and Shupe, \{M. A.\}",

note = "Publisher Copyright: {\textcopyright} 2013 CERN",

year = "2013",

month = feb,

day = "4",

doi = "10.1103/PhysRevD.87.032002",

language = "English (US)",

volume = "87",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

number = "3",

}

TY - JOUR

T1 - Measurement of the Λb0 lifetime and mass in the ATLAS experiment

AU - Atlas Collaboration

AU - Aad, G.

AU - Abajyan, T.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdel Khalek, S.

AU - Abdelalim, A. A.

AU - Abdinov, O.

AU - Aben, R.

AU - Abi, B.

AU - Abolins, M.

AU - Abouzeid, O. S.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Acerbi, E.

AU - Acharya, B. S.

AU - Adamczyk, L.

AU - Adams, D. L.

AU - Addy, T. N.

AU - Adelman, J.

AU - Adomeit, S.

AU - Adragna, P.

AU - Adye, T.

AU - Aefsky, S.

AU - Aguilar-Saavedra, J. A.

AU - Agustoni, M.

AU - Aharrouche, M.

AU - Ahlen, S. P.

AU - Ahles, F.

AU - Ahmad, A.

AU - Ahsan, M.

AU - Aielli, G.

AU - Akdogan, T.

AU - Åkesson, T. P.A.

AU - Akimoto, G.

AU - Akimov, A. V.

AU - Alam, M. S.

AU - Alam, M. A.

AU - Albert, J.

AU - Albrand, S.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alessandria, F.

AU - Alexa, C.

AU - Alexander, G.

AU - Alexandre, G.

AU - Cheu, E.

AU - Johns, K. A.

AU - Loch, P.

AU - Rutherfoord, J. P.

AU - Shupe, M. A.

PY - 2013/2/4

Y1 - 2013/2/4

N2 - A measurement of the Λb0 lifetime and mass in the decay channel Λb0→J/ψ(μ+μ-)Λ0(pπ -) is presented. The analysis uses a signal sample of about 2200 Λb0 and Λ̄b0 decays that are reconstructed in 4.9 fb -1 of ATLAS pp collision data collected in 2011 at the LHC center-of-mass energy of 7 TeV. A simultaneous mass and decay time maximum likelihood fit is used to extract the Λb0 lifetime and mass. They are measured to be τΛb=1.449±0.036(stat) ±0.017(syst) ps and mΛb=5619.7±0. 7(stat)±1.1(syst) MeV.

AB - A measurement of the Λb0 lifetime and mass in the decay channel Λb0→J/ψ(μ+μ-)Λ0(pπ -) is presented. The analysis uses a signal sample of about 2200 Λb0 and Λ̄b0 decays that are reconstructed in 4.9 fb -1 of ATLAS pp collision data collected in 2011 at the LHC center-of-mass energy of 7 TeV. A simultaneous mass and decay time maximum likelihood fit is used to extract the Λb0 lifetime and mass. They are measured to be τΛb=1.449±0.036(stat) ±0.017(syst) ps and mΛb=5619.7±0. 7(stat)±1.1(syst) MeV.

UR - https://www.scopus.com/pages/publications/84873686778

UR - https://www.scopus.com/pages/publications/84873686778#tab=citedBy

U2 - 10.1103/PhysRevD.87.032002

DO - 10.1103/PhysRevD.87.032002

M3 - Article

AN - SCOPUS:84873686778

SN - 1550-7998

VL - 87

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 3

M1 - 032002

ER -

Measurement of the Λb0 lifetime and mass in the ATLAS experiment

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