Evidence for the decay B_s^0 --> D_s^(*)D_s^(*) and a measurement of Delta_Gamma_s^CP/Gamma_s

Abstract

We search for the semi-inclusive process B_s^0 --> D_s^(*)D_s^(*) using 2.8 fb^-1 of ppbar collisions at s^(1/2) = 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 Br(B_s^0 --> D_s^(*)D_s^(*)) = 0.035 +/- 0.010(stat) +/- 0.011(syst). Under certain theoretical assumptions, these double-charm final states saturate CP-even eigenstates in the B_s^0 decays resulting in a width difference of Delta_Gamma_s^CP/Gamma_s = 0.072 +/- 0.021(stat) +/- 0.022(syst).

submitted to Phys. Rev. Lett

References in corpus (4)

• Direct Limits on the Bs Oscillation Frequency
• Measurement of $\boldmath {B_s^0}$ mixing parameters from the flavor-tagged decay
• Measurement of the $B_s^0$ Lifetime Using Semileptonic Decays
• Measurement of the branching fraction Br(Bs -> Ds(*) Ds(*))

Cited by in corpus (5)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Branching Ratio Measurements of $B_s$ Decays
• Measurement of Bs0 --> Ds(*)+ Ds(*)- Branching Ratios
• Observation of Bs->Ds(*)+Ds(*)- using e+e- collisions and a determination of the Bs-Bsbar width difference ΔΓ_s
• Review of Physics Results from the Tevatron: Heavy Flavor Physics