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Search for CP violation in the decay B0-->D*+/-D-/+
Authors:Aushev T  Iwasaki Y  Abe K  Abe K  Adachi I  Aihara H  Akatsu M  Asano Y  Aziz T  Bahinipati S  Bakich A M  Bay A  Bedny I  Bitenc U  Bizjak I  Blyth S  Bondar A  Bozek A  Bracko M  Brodzicka J  Chang P  Chao Y  Chen A  Chen W T  Cheon B G  Chistov R  Choi Y  Chuvikov A  Danilov M  Dash M  Dong L Y  Dragic J  Drutskoy A  Eidelman S  Eiges V  Enari Y  Fang F  Fratina S  Gabyshev N  Garmash A  Gershon T  Gokhroo G  Golob B  Hastings N C  Hayasaka K  Hazumi M  Higuchi T  Hinz L  Hokuue T  Hoshi Y  Hou S  Hou W-S  Iijima T  Imoto A  Inami K  Ishikawa A  Ishino H  Itoh R  Iwasaki M  Kang J H  Kang J S  Kataoka S U  Katayama N  Kawai H  Kawasaki T  Khan H R
Affiliation:Institute for Theoretical and Experimental Physics, Moscow.
Abstract:We report a search for CP-violating asymmetry in B0-->D(*+/-)D-/+ decays. The analysis employs two methods of B0 reconstruction: full and partial. In the full reconstruction method all daughter particles of the B0 are required to be detected; the partial reconstruction technique requires a fully reconstructed D- and only a slow pion from the D(*+)-->D0pi(+)(slow) decay. From a fit to the distribution of the time interval corresponding to the distance between two B meson decay points we calculate the CP-violating parameters and find the significance of nonzero CP asymmetry to be 2.7 standard deviations.
Keywords:
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