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"A measurement of the Lambda(0)(b) lifetime and mass in the decay channel Lambda(0)(b) -> J\/psi (mu(+) mu(-))Lambda(0)(p pi(-)) is presented. The analysis uses a signal sample of about 2200 Lambda(0)(b) and (Lambda) over bar (0)(b) 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 Lambda(0)(b) lifetime and mass. They are measured to be tau(Lambda b) = 1.449 +\/- 0.036(stat) +\/- 0.017(syst) ps and m(Lambda b) = 5619.7 +\/- 0.7(stat) +\/- 1.1(syst) MeV. DOI: 10.1103\/PhysRevD.87.032002"

Aad, G., Abajyan, T., Abbott, B., Abdallah, J., Khalek, S.a., Abdelalim, A.a., et al. (2013). Measurement of the Lambda(0)(b) lifetime and mass in the ATLAS experiment. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 87(3), 1-19 [10.1103/PhysRevD.87.032002].

Measurement of the Lambda(0)(b) lifetime and mass in the ATLAS experiment

CERADINI, Filippo;DI MICCO, Biagio;Di Nardo R;Orestano D;PETRUCCI, FABRIZIO;