Evidence for neutral B meson decays to ωk*0

Goldenzweig, P.; Schwartz, A.J.; Adachi, I.; Aihara, H.; Arinstein, K.; Aulchenko, V.; Aushev, T.; Bahinipati, S.; Bakich, A.M.; Bay, A.; Bedny, I.; Bhardwaj, V.; Bitenc, U.; Bondar, A.; Bozek, A.; Bračko, M.; Browder, T.E.; Chang, P.; Chao, Y.; Chen, A.; Chen, K.-F.; Cheon, B.G.; Chiang, C.-C.; Chistov, R.; Cho, I.-S.; Choi, Y.; Dalseno, J.; Dash, M.; Drutskoy, A.; Eidelman, S.; Golob, B.; Ha, H.; Hayasaka, K.; Hayashii, H.; Hazumi, M.; Heffernan, D.; Hoshi, Y.; Hou, W.-S.; Hsiung, Y.B.; Hyun, H.J.; Iijima, T.; Inami, K.; Ishikawa, A.; Ishino, H.; Iwasaki, M.; Kah, D.H.; Kang, J.H.; Kawasaki, T.; Kichimi, H.; Kim, H.J.; Kim, S.K.; Kim, Y.I.; Kim, Y.J.; Kinoshita, K.; Korpar, S.; Križan, P.; Krokovny, P.; Kumar, R.; Kuzmin, A.; Kwon, Y.-J.; Kyeong, S.-H.; Lange, J.S.; Lee, J.S.; Lee, M.J.; Lee, S.E.; Lesiak, T.; Li, J.; Limosani, A.; Lin, S.-W.; Liu, C.; Liu, Y.; MacNaughton, J.; Mandl, F.; McOnie, S.; Miyabayashi, K.; Miyata, H.; Miyazaki, Y.; Mizuk, R.; Nagamine, T.; Nakano, E.; Nakao, M.; Nakazawa, H.; Nishida, S.; Nitoh, O.; Ogawa, S.; Ohshima, T.; Okuno, S.; Olsen, S.L.; Ostrowicz, W.; Ozaki, H.; Pakhlov, P.; Pakhlova, G.; Palka, H.; Park, C.W.; Park, H.; Park, H.K.; Peak, L.S.; Pestotnik, R.; Piilonen, L.E.; Sahoo, H.; et al.

doi:10.1103/PhysRevLett.101.231801

research article

Evidence for neutral B meson decays to ωk*0

Goldenzweig, P.

•

Schwartz, A.J.

•

Adachi, I.

2008

Physical Review Letters

We present the results of a study of the charmless vector-vector decay B0→ωK0 with 657×106 BB̅ pairs collected with the Belle detector at the KEKB e+e- collider. We measure the branching fraction to be B(B0→ωK0)=[1.8±0.7(stat)±0.3(syst)]×10-6 with 3.0σ significance. We also perform a helicity analysis of the ω and K0 vector mesons, and obtain the longitudinal polarization fraction fL(B0→ωK0)=0.56±0.29(stat)-0.08+0.18(syst). Finally, we measure a large nonresonant branching fraction B[B0→ωK+π-;MKπ∈(0.755,1.250) GeV/c2 ]=[5.1±0.7(stat)±0.7(syst)]×10-6 with a significance of 9.5σ.