Study of B ± →K ± (K SKπ) 0 decay and determination of η c and η c(2S) parameters

Published

Journal Article

We report the results of a study of B ±→K ±η c and B ±→K ±η c(2S) decays followed by η c and η c(2S) decays to (K SKπ) 0. The results are obtained from a data sample containing 535 million BB --meson pairs collected by the Belle experiment at the KEKB e +e - collider. We measure the products of the branching fractions B(B±→K±ηc)B(ηc→KSK±π∓)=(26.7±1.4(stat)-2.6+2.9(syst)±4.9(model))×10-6 and B(B±→K±ηc(2S))B(ηc(2S)→KSK±π∓)=(3.4-1.5+2.2(stat+model)-0.4+0.5(syst))×10-6. Interference with the non-resonant component leads to significant model uncertainty in the measurement of these product branching fractions. Our analysis accounts for this interference and allows the model uncertainty to be reduced. We also obtain the following charmonia masses and widths: M(ηc)=(2985.4±1.5(stat)-2.0+0.5(syst)) MeV/c2, Γ(ηc)=(35.1±3.1(stat)-1.6+1.0(syst)) MeV/c2, M(ηc(2S))=(3636.1-4.2+3.9(stat+model)-2.0+0.7(syst)) MeV/c2, Γ(ηc(2S))=(6.6-5.1+8.4(stat+model)-0.9+2.6(syst)) MeV/c2. © 2011 Elsevier B.V.

Full Text

Duke Authors

Cited Authors

  • Vinokurova, A; Kuzmin, A; Eidelman, S; Arinstein, K; Aulchenko, V; Aushev, T; Bakich, AM; Balagura, V; Barberio, E; Belous, K; Bhardwaj, V; Bondar, A; Bozek, A; Bračko, M; Brodzicka, J; Browder, TE; Chang, MC; Chao, Y; Chen, A; Chen, P; Cheon, BG; Chistov, R; Cho, IS; Cho, K; Choi, SK; Choi, Y; Dalseno, J; Danilov, M; Doležal, Z; Epifanov, D; Gaur, V; Gabyshev, N; Garmash, A; Golob, B; Ha, H; Haba, J; Hayashii, H; Horii, Y; Hoshi, Y; Hou, WS; Hsiung, YB; Hyun, HJ; Iijima, T; Inami, K; Ishikawa, A; Itoh, R; Iwabuchi, M; Iwashita, T; Julius, T; Kang, JH; Kapusta, P; Kawasaki, T; Kiesling, C; Kim, HJ; Kim, HO; Kim, MJ; Kim, YJ; Kinoshita, K; Ko, BR; Križan, P; Kumar, R; Kumita, T; Kwon, YJ; Kyeong, SH; Lee, MJ; Lee, SH; Li, J; Li, Y; Lim, CL; Liu, C; Liventsev, D; Louvot, R; Matvienko, D; Matyja, A; McOnie, S; Miyabayashi, K; Miyata, H; Miyazaki, Y; Mizuk, R; Mohanty, GB; Moll, A; Nakano, E; Nakazawa, H; Natkaniec, Z; Nishida, S; Nitoh, O; Ohshima, T; Okuno, S; Olsen, SL; Pakhlov, P; Pakhlova, G; Park, CW; Pestotnik, R; Petrič, M; Piilonen, LE; Poluektov, A; Röhrken, M; Ryu, S; Sahoo, H; Sakai, Y

Published Date

  • December 6, 2011

Published In

Volume / Issue

  • 706 / 2-3

Start / End Page

  • 139 - 149

International Standard Serial Number (ISSN)

  • 0370-2693

Digital Object Identifier (DOI)

  • 10.1016/j.physletb.2011.11.014

Citation Source

  • Scopus