Search for CP violation in semileptonic Bs decays

Abstract

We have performed a search for CP violation in a sample of Bs -> Ds mu X decays corresponding to $5$~fb${}^{-1}$ of proton-antiproton collisions collected by the D0 detector in Run~II at the Fermilab Tevatron Collider. New physics in $B_s^0$ mixing could contribute a significant CP violating weak phase, which would be observed as a difference in the decay-time distribution for $B_s^0\to {\bar{B}}_s^0$ oscillated states versus that for ${\bar{B}}_s^0\to B_s^0$. A fit to the decay-time distributions of the $B_s^0/{\bar{B}}_s^0$ candidates yields the flavor-specific asymmetry $a_{fs}^s=[-1.7\pm 9.1{(\mathrm{stat})}_{-1.5}^{+1.4}(\mathrm{syst})]\times 10^{-3}$, which excludes CP violation due to new physics within the experimental sensitivity.

published in Phys. Rev. D

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• Measurement of the flavour-specific CP-violating asymmetry $a_{\mathrm{sl}}^s$ in $B_s^0$ decays
• Measurement of the semileptonic charge asymmetry using Bs^0 -> D_s mu X decays
• D0 Dimuon Asymmetry in $B_s-{\bar{B}}_s$ Mixing and Constraints on New Physics
• Neutral Gauge Boson Contributions to the Dimuon Charge Asymmetry in B Decays
• The D0 same-charge dimuon asymmetry and possibile new CP violation sources in the $B_s-{\bar{B}}_s$ system
• CP Violating Contribution to Delta Gamma in the B_s System from Mixing with a Hidden Pseudoscalar
• Measurement of the production fraction times branching fraction f(b --> Λ_b)B(Λ_b --> J/ψΛ)
• Large loop effects of extra SUSY Higgs doublets to CP violation in B^0 mixing
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• Like-sign dimuon charge asymmetry in Randall-Sundurm model
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• Review of Physics Results from the Tevatron: Heavy Flavor Physics
• The like-sign dimuon charge asymmetry at the Tevatron: corrections from B meson fragmentation
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• Constraining CP violation in neutral meson mixing with theory input
• B-Physics at the Tevatron (Proceedings of PASCOS2010)
• Search for New Physics in the Bs Sector at the Tevatron