Observation of the doubly strange b baryon Omegab-
- PMID: 19113541
- DOI: 10.1103/PhysRevLett.101.232002
Observation of the doubly strange b baryon Omegab-
- PMID: 19113541
- DOI: 10.1103/PhysRevLett.101.232002
Abstract
We report the observation of the doubly strange b baryon Omegab- in the decay channel Omegab(-)-->J/psiOmega-, with J/psi-->mu+mu(-) and Omega(-)-->LambdaK(-)-->(ppi-)K-, in pp collisions at sqrt[s]=1.96 TeV. Using approximately 1.3 fb(-1) of data collected with the D0 detector at the Fermilab Tevatron Collider, we observe 17.8+/-4.9(stat)+/-0.8(syst) Omegab- signal events at a mass of 6.165+/-0.010(stat)+/-0.013(syst) GeV. The significance of the observed signal is 5.4sigma, corresponding to a probability of 6.7 x 10(-8) of it arising from a background fluctuation.
LinkOut - more resources
Full Text Sources
Research Materials
Miscellaneous