Search for CP violation in semileptonic Bs decays

Collaboration, D0 and Abazov, V. and Bertram, Iain and Borissov, Guennadi and Williams, Mark and Fox, Harald and Ratoff, Peter (2009) Search for CP violation in semileptonic Bs decays. Physical Review D, 82 (1): 012003. ISSN 1550-7998

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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 $a_{fs}^{s}=[-1.7\pm 9.1\mathrm{(stat)}^{+1.4}_{-1.5}\mathrm{(syst)}] \times 10^{-3}$, which excludes CP violation due to new physics within the experimental sensitivity.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review D
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© 2010 American Physical Society
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?? physicsqc physics ??
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Deposited On:
07 Aug 2012 08:52
Last Modified:
23 Jan 2024 01:46