Evidence for the Decay B{sub s}{sup 0}{yields}D{sub s}{sup (*)}D{sub s}{sup (*)} and a Measurement of {delta}{gamma}{sub s}{sup CP}/{gamma}{sub s}

Journal Article · Fri Mar 06 00:00:00 EST 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.102.091801· OSTI ID:21180251

Abazov, V M; Alexeev, G D; Kharzheev, Y N; Malyshev, V L; Tokmenin, V V; Vertogradov, L S; Yatsunenko, Y A ^[1]; Abbott, B; Gutierrez, P; Hossain, S; Jain, S; Rominsky, M; Severini, H; Skubic, P; Strauss, M ^[2]; Abolins, M; Benitez, J A; Brock, R; Dyer, J; Edmunds, D ^[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 search for the semi-inclusive process B{sub s}{sup 0}{yields}D{sub s}{sup (*)}D{sub s}{sup (*)} using 2.8 fb{sup -1} of pp collisions at {radical}(s)=1.96 TeV recorded by the D0 detector operating at the Fermilab Tevatron Collider. We observe 26.6{+-}8.4 signal events with a significance above background of 3.2 standard deviations yielding a branching ratio of B(B{sub s}{sup 0}{yields}D{sub s}{sup (*)}D{sub s}{sup (*)})=0.035{+-}0.010(stat.){+-}0.011(syst.). Under certain theoretical assumptions, these double-charm final states saturate CP-even eigenstates in the B{sub s}{sup 0} decays resulting in a width difference of {delta}{gamma}{sub s}{sup CP}/{gamma}{sub s}=0.072{+-}0.021(stat.){+-}0.022(syst.)

• OSTI ID: 21180251
• Journal Information: Physical Review Letters, Vol. 102, Issue 9; Other Information: DOI: 10.1103/PhysRevLett.102.091801; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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TEV RANGE 01-10