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

A. Vinokurova, A. Kuzmin, S. Eidelman, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, K. Belous, V. Bhardwaj, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, M. C. Chang, Y. Chao, A. Chen, P. ChenB. G. Cheon, R. Chistov, I. S. Cho, K. Cho, S. K. Choi, Y. Choi, J. Dalseno, M. Danilov, Z. Doležal, D. Epifanov, V. Gaur, N. Gabyshev, A. Garmash, B. Golob, H. Ha, J. Haba, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, T. Iwashita, T. Julius, J. H. Kang, P. Kapusta, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Križan, R. Kumar, T. Kumita, Y. J. Kwon, S. H. Kyeong, M. J. Lee, S. H. Lee, J. Li, Y. Li, C. L. Lim, C. Liu, D. Liventsev, R. Louvot, D. Matvienko, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, A. Moll, E. Nakano, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, A. Poluektov, M. Röhrken, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, O. Seon, M. Shapkin, V. Shebalin, C. P. Shen, J. G. Shiu, B. Shwartz, F. Simon, P. Smerkol, Y. S. Sohn, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, M. Sumihama, T. Sumiyoshi, S. Tanaka, Y. Teramoto, I. Tikhomirov, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, K. E. Varvell, A. Vossen, C. H. Wang, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, Z. P. Zhang, V. Zhilich, P. Zhou, V. Zhulanov, A. Zupanc, O. Zyukova

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)139-149
Number of pages11
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume706
Issue number2-3
DOIs
StatePublished - 6 Dec 2011

Keywords

  • B decay
  • Etac

Fingerprint

Dive into the research topics of 'Study of B <sup>±</sup>→K <sup>±</sup>(K <sub>S</sub>Kπ) <sup>0</sup> decay and determination of η <sub>c</sub> and η <sub>c</sub>(2S) parameters'. Together they form a unique fingerprint.

Cite this