Abazov, V. M. ; Mondal, N. K. ; et., al (2008) Observation of the doubly strange b Baryon Ωb- Physical Review Letters, 101 (23). e232002_1-e232002_7. ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v101/i23/e232002
Related URL: http://dx.doi.org/10.1103/PhysRevLett.101.232002
Abstract
We report the observation of the doubly strange b baryon Ω b- in the decay channel Ω b-→J/ψΩ- with J/ψ→ μ+μ- and Ω -→Λ K̅→ (pπ)K̅ in pp̅ collisions at √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) Ω b- signal events at a mass of 6.165 ±0.01(stat) ±0.013(syst) GeV. The significance of the observed signal is 5.4σcorresponding to a probability of 6.7×10-8of it arising from a background fluctuation.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 76174 |
| Deposited On: | 31 Dec 2011 08:19 |
| Last Modified: | 31 Dec 2011 08:19 |
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