Study of B^{+-} -&gt; K^{+-}(K_S K pi)^0 Decay and Determination of eta_c and eta_c(2S) Parameters
Creators: name: Belle Collaboration
name: Vinokurova, A.
name: Kuzmin, A.
name: Eidelman, S.
name: Arinstein, K.
name: Aulchenko, V.
name: Aushev, T.
name: Bakich, A. M.
name: Balagura, V.
name: Barberio, E.
name: Belous, K.
name: Bhardwaj, V.
name: Bondar, A.
name: Bozek, A.
name: Bracko, M.
name: Brodzicka, J.
name: Browder, T. E.
name: Chang, M. -C.
name: Chao, Y.
name: Chen, A.
name: Chen, P.
name: Cheon, B. G.
name: Chistov, R.
name: Cho, I. -S.
name: Cho, K.
name: Choi, S. -K.
name: Choi, Y.
name: Dalseno, J.
name: Danilov, M.
name: Dolezal, Z.
name: Epifanov, D.
name: Gaur, V.
name: Gabyshev, N.
name: Garmash, A.
name: Golob, B.
name: Ha, H.
name: Haba, J.
name: Hayashii, H.
name: Horii, Y.
name: Hoshi, Y.
name: Hou, W. -S.
name: Hsiung, Y. B.
name: Hyun, H. J.
name: Iijima, T.
name: Inami, K.
name: Ishikawa, A.
name: Itoh, R.
name: Iwabuchi, M.
name: Iwashita, T.
name: Julius, T.
name: Kang, J. H.
name: Kapusta, P.
name: Kawasaki, T.
name: Kiesling, C.
name: Kim, H. J.
name: Kim, H. O.
name: Kim, M. J.
name: Kim, Y. J.
name: Kinoshita, K.
name: Ko, B. R.
name: Krizan, P.
name: Kumar, R.
name: Kumita, T.
name: Kwon, Y. -J.
name: Kyeong, S. -H.
name: Lee, M. J.
name: Lee, S. -H.
name: Li, J.
name: Li, Y.
name: Lim, C. -L.
name: Liu, C.
name: Liventsev, D.
name: Louvot, R.
name: Matvienko, D.
name: Matyja, A.
name: McOnie, S.
name: Miyabayashi, K.
name: Miyata, H.
name: Miyazaki, Y.
name: Mizuk, R.
name: Mohanty, G. B.
name: Moll, A.
name: Nakano, E.
name: Nakazawa, H.
name: Natkaniec, Z.
name: Nishida, S.
name: Nitoh, O.
name: Ohshima, T.
name: Okuno, S.
name: Olsen, S. L.
name: Pakhlov, P.
name: Pakhlova, G.
name: Park, C. W.
name: Pestotnik, R.
name: Petric, M.
name: Piilonen, L. E.
name: Poluektov, A.
name: Röhrken, M.
name: Ryu, S.
name: Sahoo, H.
name: Sakai, Y.
name: Schneider, O.
name: Schwanda, C.
name: Senyo, K.
name: Seon, O.
name: Shapkin, M.
name: Shebalin, V.
name: Shen, C. P.
name: Shiu, J. -G.
name: Shwartz, B.
name: Simon, F.
name: Smerkol, P.
name: Sohn, Y. -S.
name: Sokolov, A.
name: Solovieva, E.
name: Stanic, S.
name: Staric, M.
name: Sumihama, M.
name: Sumiyoshi, T.
name: Tanaka, S.
name: Teramoto, Y.
name: Tikhomirov, I.
name: Trabelsi, K.
name: Uchida, M.
name: Uglov, T.
name: Unno, Y.
name: Uno, S.
name: Usov, Y.
name: Varner, G.
name: Varvell, K. E.
name: Vossen, A.
name: Wang, C. H.
name: Wang, P.
name: Watanabe, M.
name: Watanabe, Y.
name: Williams, K. M.
name: Won, E.
name: Yabsley, B. D.
name: Yamashita, Y.
name: Yuan, C. Z.
name: Zhang, Z. P.
name: Zhilich, V.
name: Zhou, P.
name: Zhulanov, V.
name: Zupanc, A.
name: Zyukova, O.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We report the results of a study of $B^{\pm}\to K^{\pm}η_c$ and $B^{\pm}\to K^{\pm}η_c(2S)$ 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 $B\bar{B}$-meson pairs collected by the Belle experiment at the KEKB $e^+e^-$ collider. We measure the products of the branching fractions ${\mathcal B}(B^{\pm}\to K^{\pm}η_c){\mathcal B}(η_c\to K_S K^{\pm}π^{\mp})=(26.7\pm 1.4(stat)^{+2.9}_{-2.6}(syst)\pm 4.9(model))\times 10^{-6}$ and ${\mathcal B}(B^{\pm}\to K^{\pm}η_c(2S)){\mathcal B}(η_c(2S)\to K_S K^{\pm}π^{\mp})=(3.4^{+2.2}_{-1.5}(stat+model)^{+0.5}_{-0.4} syst))\times 10^{-6}$. 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: $M(η_c)=(2985.4\pm 1.5(stat)^{+0.5}_{-2.0}(syst))$ MeV/$c^2$, $Γ(η_c)=(35.1\pm 3.1(stat)^{+1.0}_{-1.6}(syst))$ MeV/$c^2$, $M(η_c(2S))=(3636.1^{+3.9}_{-4.2}(stat+model)^{+0.7}_{-2.0}(syst))$ MeV/$c^2$, $Γ(η_c(2S))=(6.6^{+8.4}_{-5.1}(stat+model)^{+2.6}_{-0.9}(syst))$ MeV/$c^2$.
description: 23 pages, 10 figures, submitted to PLB