Observation of two charged bottomonium-like resonances
We report the observation of two narrow structures at 10610 MeV/c 2 and 10650 MeV/c2 in the π ±γ(nS) (n = 1,2,3) and π±hb(mP) (m = 1,2) mass spectra that are produced in association with a single charged pion in γ(5S) decays. The measured masses and widths of the two structures averaged over the five final states are M1 = 10608.4 ± 2.0MeV/c2, γ1 = 15.6 ± 2.5 MeV and M 2 = 10653.2 ± 1.5 MeV/c2, γ2 = 14.4 ±3.2 MeV. Analysis favors quantum numbers of IG(J P)=1+(1+) for both states. The results are obtained with a 121.4 fb-1 data sample collected with the Belle detector near the γ(5S) resonance at the KEKB asymmetric-energy e+e- collider.
Adachi, I; Adamczyk, K; Aihara, H; Arinstein, K; Arita, Y; Asner, DM; Aso, T; Aulchenko, V; Aushev, T; Aziz, T; Bakich, AM; Balagura, V; Ban, Y; Barberio, E; Bay, A; Bedny, I; Belhorn, M; Belous, K; Bhardwaj, V; Bhuyan, B; Bischofberger, M; Blyth, S; Bondar, A; Bonvicini, G; Bozek, A; Bračko, M; Brodzicka, J; Brovchenko, O; Browder, TE; Chang, MC; Chang, P; Chao, Y; Chen, A; Chen, KF; Chen, P; Cheon, BG; Chistov, R; Cho, IS; Cho, K; Choi, KS; Choi, SK; Choi, Y; Crnkovic, J; Dalseno, J; Danilov, M; Das, A; Doležal, Z; Drásal, Z; Drutskoy, A; Duh, YT; Dungel, W; Dutta, D; Eidelman, S; Epifanov, D; Esen, S; Fast, JE; Feindt, M; Fujikawa, M; Gaur, V; Gabyshev, N; Garmash, A; Goh, YM; Golob, B; Grosse Perdekamp, M; Guo, H; Ha, H; Haba, J; Han, YL; Hara, K; Hara, T; Hasegawa, Y; Hayasaka, K; Hayashii, H; Heffernan, D; Higuchi, T; Hoi, CT; Horii, Y; Hoshi, Y; Hoshina, K; Hou, WS; Hsiung, YB; Hsu, CL; Hyun, HJ; Igarashi, Y; Iijima, T; Imamura, M; Inami, K; Ishikawa, A; Itoh, R; Iwabuchi, M; Iwasaki, M; Iwasaki, Y; Iwashita, T; Iwata, S; Jaegle, I; Jones, M; Joshi, NJ; Julius, T; Kakuno, H; Kang, JH
Proceedings of the 9th International Conference on Flavor Physics and Cp Violation, Fpcp 2011