Measurement of the $Λ_b^0$ lifetime and mass in the ATLAS experiment

Tanasijczuk, Andres Jorge;ATLAS;et.al.
(2013) Physical review D — Vol. 87 (2013)

Files

1207.pdf
  • Open Access
  • Adobe PDF
  • 862.11 KB
Download

Details

Authors
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.
Affiliations

Citations

  • APA
  • Chicago
  • FWB

Tanasijczuk, A. J., ATLAS, & et al. (2013). Measurement of the $Λ_b^0$ lifetime and mass in the ATLAS experiment. Physical review D, 87. https://doi.org/10.1103/PhysRevD.87.032002 (Original work published 2013)