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Search for CP Violation in B^{0}- B[over ¯]^{0} Mixing Using Partial Reconstruction of B^{0}→D^{*-}Xℓ^{+}ν_{ℓ} and a Kaon Tag.

著者 Lees JP , Poireau V , Tisserand V , Grauges E , Palano A , Eigen G , Stugu B , Brown DN , Kerth LT , Kolomensky YG , Lee MJ , Lynch G , Koch H , Schroeder T , Hearty C , Mattison TS , McKenna JA , So RY , Khan A , Blinov VE , Buzykaev AR , Druzhinin VP ,
Phys Rev Lett.2013 Sep 6 ; 111(10):101802.
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We present results of a search for CP violation in B^{0}- B[over ¯]^{0} mixing with the BABAR detector. We select a sample of B^{0}→D^{*-}Xℓ^{+}ν decays with a partial reconstruction method and use kaon tagging to assess the flavor of the other B meson in the event. We determine the CP violating asymmetry A_{CP}≡[N(B^{0}B^{0})-N(B[over ¯]^{0}B[over ¯]^{0})]/[N(B^{0}B^{0})+N(B[over ¯]^{0}B[over ¯]^{0})]=(0.06±0.17_{-0.32}^{+0.38})%, corresponding to Δ_{CP}=1-|q/p|=(0.29±0.84_{-1.61}^{+1.88})×10^{-3}.
PMID: 25166652 [PubMed - as supplied by publisher]
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