Observation of large CP violation and evidence for direct CP violation in B0 → π+ π- decays
Abe, K.;
Abe, K.;
Abe, N.;
Abe, T.;
Adachi, I.;
Aihara, H.;
Akai, K.;
Akatsu, M.;
Akemoto, M.;
Asano, Y.
Aso, T.;
Aulchenko, V.;
Aushev, T.;
Bakich, A.M.;
Ban, Y.;
Banerjee, S.;
Bay, A.;
Bedny, I.;
Bizjak, I.;
Bondar, A.;
Bozek, A.;
Bračko, M.;
Browder, T.E.;
Chao, Y.;
Chen, K.-F.;
Cheon, B.G.;
Chistov, R.;
Choi, S.-K.;
Choi, Y.;
Chuvikov, A.;
Cole, S.;
Danilov, M.;
Dragic, J.;
Drutskoy, A.;
Eidelman, S.;
Eiges, V.;
Enari, Y.;
Epifanov, D.;
Flanagan, J.;
Furukawa, K.;
Gabyshev, N.;
Garmash, A.;
Gershon, T.;
Golob, B.;
Haba, J.;
Hara, K.;
Hastings, N.C.;
Hayashii, H.;
Hazumi, M.;
Hinz, L.;
Hokuue, T.;
Hoshi, Y.;
Hou, W.-S.;
Hsiung, Y.B.;
Huang, H.-C.;
Iijima, T.;
Ikeda, H.;
Inami, K.;
Ishikawa, A.;
Ishino, H.;
Itoh, R.;
Iwasaki, H.;
Iwasaki, M.;
Iwasaki, Y.;
Kakuno, H.;
Kamitani, T.;
Kang, J.H.;
Kang, J.S.;
Kapusta, P.;
Kataoka, S.U.;
Katayama, N.;
Kawai, H.;
Kawasaki, T.;
Kibayashi, A.;
Kichimi, H.;
Kikutani, E.;
Kim, H.J.;
Kim, J.H.;
Kim, S.K.;
Kinoshita, K.;
Koppenburg, P.;
Korpar, S.;
Križan, P.;
Krokovny, P.;
Kumar, S.;
Kuzmin, A.;
Kwon, Y.-J.;
Lange, J.S.;
Leder, G.;
Lee, S.H.;
Lee, Y.-J.;
Lesiak, T.;
Li, J.;
Limosani, A.;
Lin, S.-W.;
Liventsev, D.;
MacNaughton, J.;
Mandl, F.;
Marlow, D.
The CP violation parameters in Bo → π +π- decay were investigated. The flavor of the accompanying B meson was identified by reconstructing B o→π+π- CP eigenstate. It was observed that the expected sensitivity was optimized using the ratio LR. The study showed that there was a direct CP violation with a significance at or greater than 3.2σ.
Reference
Record created on 2010-11-05, modified on 2017-05-12
