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

Bertram, Iain and Borissov, Guennadi and Williams, Mark and Fox, Harald and Ross, Anthony and Ratoff, Peter and D0 Collaboration, The (2013) Measurement of the semileptonic charge asymmetry using Bs^0 -> D_s mu X decays. Physical review letters, 110 (1): 011801. ISSN 1079-7114

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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.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Additional Information:
7 pages, 3 figures, submitted to Phys. Rev. Lett
Uncontrolled Keywords:
?? physicsphysics and astronomy(all)qc physics ??
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Deposited On:
30 Jul 2012 13:33
Last Modified:
23 Jan 2024 01:46