Search for CP violation in Bs0→μ+Ds-X decays in pp̄ collisions at √s=1.96TeV

We have performed a search for CP violationin a sample of B-s(0) -> mu+Ds-X decays corresponding to 5 fb(-1) of proton- antiprotoncollisions collected by the D0 detector in Run II at the Fermilab TevatronCollider. New physics in B-s(0) mixing could contribute a significant CP violatingweak phase, which would be observed as a difference in the decay-time distribution for B-s(0) -> (B) over bar (0)(s) oscillated states versus that for (B) over bar (0)(s) -> B-s(0). A fit to the decay-time distributions of the B-s(0)/(B) over bar (0)(s) candidates yields the flavor-specific asymmetry as a(fs)(s) = [-1.7 +/- 9.1(stat)(-1.5)(+1.4)(syst) x 10(-3), which excludes CP violationdue to new physics within the experimental sensitivity.