6533b7d5fe1ef96bd12643b5

RESEARCH PRODUCT

Measurement of the Xi(-)(b) and Omega(-)(b) baryon lifetimes

Lhcb CollaborationFernando Martínez VidalArantza Oyanguren CamposPablo Ruiz VallsCarlos Sánchez Mayordomo

subject

High Energy Physics::ExperimentFísica nuclearAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Earth and Planetary AstrophysicsNuclear Experiment

description

Using a data sample of pp collisions corresponding to an integrated luminosity of 3 fb(-1), the Xi(-)(b) and Omega(-)(b) baryons are reconstructed in the Xi(-)(b) -> J/psi Xi(-) and Omega(-)(b) -> J/psi Omega(-) decay modes and their lifetimes measured to be tau(Xi(-)(b)) = 1.55(-0.09)(+0.10) (stat) +/- 0.03 (syst) ps, tau(Omega(-)(b)) = 1.54(-0.21)(+0.26) (stat) +/- 0.05 (syst) ps. These are the most precise determinations to date. Both measurements are in good agreement with previous experimental results and with theoretical predictions.

yearjournalcountryeditionlanguage
2014-01-01
10.1016/j.physletb.2014.06.064http://hdl.handle.net/10550/52836