Inclusive and exclusive measurements of B decays to χc1 and χc2 (chi(c1) and chi(c2)) at Belle

V. Bhardwaj,K. Miyabayashi, E. Panzenboeck,K. Trabelsi,A. Frey,A. Abdesselam,I. Adachi, H. Aihara,S. Al Said,K. Arinstein,D. M. Asner,H. Atmacan,V. Aulchenko,T. Aushev,R. Ayad,V. Babu,I. Badhrees,S. Bahinipati,A. M. Bakich,A. Bala,V. Bansal, E. Barberio,B. Bhuyan,J. Biswal,A. Bobrov,A. Bondar,A. Bozek, M. Bracko,T. E. Browder, D. Cervenkov, V. Chekelian,A. Chen,B. G. Cheon, K. Chilikin, R. Chistov,K. Cho,V. Chobanova,S-K. Choi,Y. Choi,D. Cinabro, J. Dalseno,M. Danilov,Z. Dolezal,D. Dutta,S. Eidelman,H. Farhat,J. E. Fast, T. Ferber,O. Frost,B. G. Fulsom,V. Gaur, N. Gabyshev,S. Ganguly, A. Garmash, R. Gillard,R. Glattauer,Y. M. Goh, P. Goldenzweig,B. Golob, D. Greenwald, J. Haba,P. Hamer,K. Hayasaka,H. Hayashii,X. H. He,W.-S. Hou, T. Iijima, K. Inami,A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle,D. Joffe,K. K. Joo,T. Julius,E. Kato,P. Katrenko,T. Kawasaki, C. Kiesling,D. Y. Kim,J. B. Kim,K. T. Kim,M. J. Kim,S. H. Kim,Y. J. Kim,K. Kinoshita,B. R. Ko,N. Kobayashi, P. Kodys, S. Korpar, P. Krizan, P. Krokovny,T. Kuhr,R. Kumar,T. Kumita,A. Kuzmin,Y.-J. Kwon,I. S. Lee,C. Li, Y. Li,L. Li Gioi, J. Libby, D. Liventsev,A. Loos,P. Lukin,M. Masuda,D. Matvienko,H. Miyata, R. Mizuk,G. B. Mohanty,S. Mohanty,A. Moll,H. K. Moon, R. Mussa, E. Nakano, M. Nakao,T. Nanut, Z. Natkaniec,M. Nayak,N. K. Nisar, S. Nishida,S. Ogawa, S. Okuno, G. Pakhlova,B. Pal,C. W. Park, H. Park,T. K. Pedlar, R. Pestotnik, M. Petric,L. E. Piilonen,C. Pulvermacher,M. V. Purohit,J. Rauch, E. Ribezl,M. Ritter, A. Rostomyan,H. Sahoo, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider,G. Schnell, C. Schwanda, Y. Seino, D. Semmler, K. Senyo,O. Seon,M. E. Sevior,V. Shebalin,C. P. Shen,T-A. Shibata,J-G. Shiu,B. Shwartz,F. Simon,J. B. Singh,Y.-S. Sohn,A. Sokolov, E. Solovieva, M. Staric, J. Stypula, M. Sumihama, T. Sumiyoshi,U. Tamponi,K. Tanida,Y. Teramoto,M. Uchida, S. Uehara,T. Uglov, Y. Unno,S. Uno, P. Urquijo,Y. Usov,C. van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova,V. Vorobyev,C. H. Wang,M-Z. Wang, P. Wang,X. L. Wang,M. Watanabe,Y. Watanabe,S. Wehle, E. Won,J. Yamaoka, S. Yashchenko,H. Ye, Y. Yook, C. Z. Yuan,Y. Yusa,Z. P. Zhang,V. Zhilich,V. Zhulanov, A. Zupanc

PHYSICAL REVIEW D（2016）

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摘要

We report inclusive and exclusive measurements for chi(c1) and chi(c2) production in B decays. We measure B(B -> chi X-c1) = (3.03 +/- 0.05 (stat) +/- 0.24(syst)) x 10(-3) and B(B -> chi X-c2) = (0.70 +/- 0.06 (stat) +/- 0.10(syst)) x 10(-3). For the first time, chi(c2) production in exclusive B decays in the modes B-0 -> chi(c2) pi K--(+) and B-0 -> chi(c2) pi(-)pi K-+(+) has been observed, along with first evidence for the B-0 -> chi(c2) pi K--(s)0 decay mode. For chi c1 production, we report the first observation in the B+ -> chi(c1) pi(-)pi K-+(+), B-0 -> chi(c1) pi(-)pi K-+(s)0 and B-0 -> chi(c1) pi(-)pi K-+(+) decay modes. Using these decay modes, we observe a difference in the production mechanism of chi(c2) in comparison to chi(c1) in B decays. In addition, we report searches for X(3872) and chi(c1) (2P) in the B+ -> (chi(c1) pi(+)pi(-))K+ decay mode. The reported results use 772 x 10(6) B (B) over bar events collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.

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