Observation of large CP violation and evidence for direct CP violation in B0 → π+ π- decays

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.

doi:10.1103/PhysRevLett.93.021601

Observation of large CP violation and evidence for direct CP violation in B0 → π+ π- decays

Abe, K. ; Abe, K. ; Abe, N. ; Abe, T.[...]

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.

Published in:

Physical Review Letters, 93, 2, 021601-1

Year:

2004

ISSN:

00319007

DOI:

10.1103/PhysRevLett.93.021601

Other identifiers:

Scopus: 2-s2.0-4043075473

Laboratories:

LPHE