Observation of the Doubly Strange b Baryon {omega}{sub b}{sup -}

Journal Article · Fri Dec 05 00:00:00 EST 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.101.232002· OSTI ID:21179959

Abazov, V M; Alexeev, G D; Kharzheev, Y M; Komissarov, E V; Malyshev, V L; Merekov, Y P; Rozhdestvenski, A; Tokmenin, V V; Vertogradov, L S; Vertogradova, Y; Yatsunenko, Y A ^[1]; Abbott, B; Gutierrez, P; Hossain, S; Jain, S; Rominsky, M; Severini, H; Skubic, P; Strauss, M ^[2]; Abolins, M ^[3]

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1. Joint Institute for Nuclear Research, Dubna (Russian Federation)
2. University of Oklahoma, Norman, Oklahoma 73019 (United States)
3. Michigan State University, East Lansing, Michigan 48824 (United States)

We report the observation of the doubly strange b baryon {omega}{sub b}{sup -} in the decay channel {omega}{sub b}{sup -}{yields}J/{psi}{omega}{sup -}, with J/{psi}{yields}{mu}{sup +}{mu}{sup -} and {omega}{sup -}{yields}{lambda}K{sup -}{yields}(p{pi}{sup -})K{sup -}, in pp collisions at {radical}(s)=1.96 TeV. Using approximately 1.3 fb{sup -1} of data collected with the D0 detector at the Fermilab Tevatron Collider, we observe 17.8{+-}4.9(stat){+-}0.8(syst) {omega}{sub b}{sup -} 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 6.7x10{sup -8} of it arising from a background fluctuation.

• OSTI ID: 21179959
• Journal Information: Physical Review Letters, Vol. 101, Issue 23; Other Information: DOI: 10.1103/PhysRevLett.101.232002; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

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