Measurement of the Λ[superscript 0 over subscript b] lifetime and mass in the ATLAS experiment
Name
Aad-2013-Measurement of the lifetime and mass in the ATLAS experiment.pdf
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396.06 KB
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Author(s)
Taylor, Frank E.
Date Issued
February 2013
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aad, G., T. Abajyan, B. Abbott, et al. Measurement of the Λ[superscript 0 over subscript b] Lifetime and Mass in the ATLAS Experiment. Physical Review D 87(3). © 2013 CERN, for the ATLAS Collaboration
Version
Final published version
Abstract
A measurement of the Λ[superscript 0 over subscript b] lifetime and mass in the decay channel Λ[superscript 0 over subscript b]→J/ψ(μ[superscript +]μ[superscript -])Λ[superscript 0](pπ[superscript -]) is presented. The analysis uses a signal sample of about 2200 Λ[superscript 0 over subscript b] and Λ̅ [superscript 0 over subscript b] decays that are reconstructed in 4.9 fb[superscript -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 Λ[superscript 0 over subscript b] lifetime and mass. They are measured to be τ[subscript Λb]=1.449±0.036(stat)±0.017(syst) ps and mΛb=5619.7±0.7(stat)±1.1(syst) MeV.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 3.0
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.87.032002
