Observation of the doubly strange b baryon Omega_b-
High Energy Physics - Experiment
2008-12-18 v2
Abstract
We report the observation of the doubly strange b baryon Omega_b- in the decay channel Omega_b- to J/psi Omega-, with J/psi to mu+ mu- and Omega- to Lambda K-, in collisions at TeV. Using approximately 1.3 fb of data collected with the D0 detector at the Fermilab Tevatron Collider, we observe 17.8 +/- 4.9 (stat) +/- 0.8 (syst) Omega_b- signal events at a mass of 6.165 +/- 0.010 (stat) +/- 0.013(syst.) GeV. The significance of the observed signal is 5.4 sigma, corresponding to a probability of 6.7 x 10^{-8} of it arising from a background fluctuation.
Cite
@article{arxiv.0808.4142,
title = {Observation of the doubly strange b baryon Omega_b-},
author = {D0 Collaboration and V. Abazov},
journal= {arXiv preprint arXiv:0808.4142},
year = {2008}
}
Comments
v2: As published in Phys. Rev. Letters