Measurement of the semileptonic charge asymmetry using Bs^0 -> D_s mu X decays

Abstract : We present a measurement of the time-integrated flavor-specific semileptonic charge asymmetry in the decays of Bs mesons that have undergone flavor mixing, a^s_ls, using B_s^0 (barB_s^0) -> D_s^-/+ mu^+/- X decays, with D_s^-/+ -> phi pi^-/+ and phi K^+ K^-, using 10.4 fb^-1 of proton-antiproton collisions collected by the D0 detector during Run II at the Fermilab Tevatron Collider. A fit to the difference between the time-integrated D_s^-$ and D_s^+ mass distributions of the B_s^0 and barB^0_s candidates yields the flavor-specific asymmetry a^s_ls = [-1.08 pm 0.72 (stat) +/-0.17 (syst)]% which is the most precise measurement and in agreement with the standard model prediction.
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http://hal.in2p3.fr/in2p3-00716216
Contributor : Marechal Françoise <>
Submitted on : Tuesday, July 10, 2012 - 10:00:52 AM
Last modification on : Tuesday, July 10, 2012 - 10:00:52 AM

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V.M. Abazov, S. Greder, F. Miconi, I. Ripp-Baudot, G. Bernardi, et al.. Measurement of the semileptonic charge asymmetry using Bs^0 -> D_s mu X decays. Physical Review Letters, American Physical Society, 2013, 110, pp.011801. <10.1103/PhysRevLett.110.011801>. <in2p3-00716216>

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