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

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University of Milan
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United States Department of Energy
Hampton University
Yale University
Ludwig Maximilian University of Munich
Istanbul Technical University
Queen Mary University of London
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Boston University
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National Technical University of Athens
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University of Pennsylvania
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Resumen

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.

Idioma original	Inglés
Número de artículo	032002
Publicación	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volumen	87
N.º	3
DOI	https://doi.org/10.1103/PhysRevD.87.032002
Estado	Publicada - 4 feb 2013
Publicado de forma externa	Sí

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@article{74aed416554e4efc90ccb46b1341d080,

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 = "G. Aad and T. Abajyan and B. Abbott and J. Abdallah and S. Kabana and \{ATLAS Collaboration\}",

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

year = "2013",

month = feb,

day = "4",

doi = "10.1103/PhysRevD.87.032002",

language = "English",

volume = "87",

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

issn = "1550-7998",

number = "3",

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TY - JOUR

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

AU - Aad, G.

AU - Abajyan, T.

AU - Abbott, B.

AU - Abdallah, J.

AU - Kabana, S.

AU - ATLAS Collaboration

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

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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