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Search for CP violation in the decay B0-->D*+/-D-/+ |
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| 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 |
| Institution: | 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. |
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