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

Research output: Contribution to journalArticle

1 Downloads (Pure)

Abstract

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
Original languageEnglish
Article number032002
JournalPhysical Review D
Volume87
Issue number3
DOIs
Publication statusPublished - 4 Feb 2013

Keywords

  • DECAYS

Fingerprint Dive into the research topics of 'Measurement of the Lambda(0)(b) lifetime and mass in the ATLAS experiment'. Together they form a unique fingerprint.

Cite this