Evidence for the decay Bs0→Ds(*)Ds(*) and a measurement of ΔΓsCP/Γs
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American Physical Society (APS)
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Abstract
We search for the semi-inclusive process Bs0→Ds(*)Ds(*) using 2.8fb-1 of pp̄ collisions at s=1.96TeV 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(Bs0→Ds(*)Ds(*))=0.035±0.010(stat. )±0.011(syst.). Under certain theoretical assumptions, these double-charm final states saturate CP-even eigenstates in the Bs0 decays resulting in a width difference of ΔΓsCP/Γs=0.072±0.021(stat.) ±0.022(syst.). © 2009 The American Physical Society.
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Physical Review Letters, v. 102, n. 9, 2009.
