Evidence for B -> h(c)K( ) and observation of eta(c()2S) -> p(p)over-bar pi( )pi(-)

K Chilikin,I Adachi,DM Asner,V Aulchenko,T Aushev,R Ayad,V Babu,I Badhrees,V Bansal,P Behera, C Beleno,M Berger,V Bhardwaj, T Bilka, J Biswal,A Bobrov,A Bondar, A Bozek,M Bracko,TE Browder,M Campajola, L Cao,D Cervenkov,V Chekelian,A Chen,BG Cheon,K Cho,S-K Choi,Y Choi,D Cinabro,S Cunliffe,S Di Carlo,Z Dolezal,T Dong,S Eidelman,D Epifanov,JE Fast,T Ferber,BG Fulsom,R Garg,V Gaur,N Gabyshev,A Garmash,M Gelb,A Giri, P Goldenzweig,O Grzymkowska,J Haba,T Hara, K Hayasaka, H Hayashii,W-S Hou,C-L Hsu,K Inami,A Ishikawa,R Itoh,M Iwasaki, Y Iwasaki,WW Jacobs,S Jia,Y Jin,D Joffe,KK Joo,T Julius,AB Kaliyar, G Karyan,Y Kato, C Kiesling,CH Kim,DY Kim,SH Kim,K Kinoshita, P Kodys, S Korpar, D Kotchetkov,R Kroeger,P Krokovny,R Kulasiri,R Kumar,Y-J Kwon, K Lalwani,JS Lange,JK Lee,Jy Lee,SC Lee,LK Li,YB Li,L Li Gio,J Libby,D Liventsev,P-C Lu,T Luo,J MacNaughton,C MacQueen, M Masuda,T Matsuda,D Matvienko,M Merola,K Miyabayashi, R Mizuk,GB Mohanty, T Mori, M Nakao, KJ Nath,M Nayak,M Niiyama, NK Nisar,S Nishida,K Nishimura,H Ono, Y Onuki,P Pakhlov,G Pakhlova, B Pal,S Pardi,H Park,S Patra,S Paul,TK Pedlar, R Pestotnik,LE Piilonen,V Popov,M Ritter,A Rostomyan,G Russo, Y Sakai,M Salehi,S Sandilya,T Sanuki, V Savinov,O Schneider, G Schnell, C Schwanda, Y Seino,K Senyo,ME Sevior,CP Shen,J-G Shiu,B Shwartz,F Simon,A Sokolov,E Solovieva, M Staric, ZS Stottler,JF Strube, T Sumiyoshi, W Sutcliffe,M Takizawa,U Tamponi,K Tanida, F Tenchini, K Trabelsi,M Uchida,S Uno, P Urquijo,Y Usov,R Van Tonder, G Varner, A Vinokurova,B Wang,CH Wang,M-Z Wang,P Wang,M Watanabe,S Watanuki, E Won, SB Yang,H Ye, J Yelton,JH Yin,CZ Yuan,J Zhang,ZP Zhang,V Zhilich, V Zhukova

PHYSICAL REVIEW D（2019）

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摘要

A search for the decays B+ -> h(c)K(+) and B-0 -> h(c)K(S)(0) is performed. Evidence for the decay B+ -> h(c)K(+) is found; its significance is 4.8 sigma. No evidence is found for B-0 -> h(c)K(S)(0). The branching fraction for B+ -> h(c)K(+) is measured to be (3.7(-0.9 -0.8)(+1.0 +038)) x 10(-5); the upper limit for the B-0 -> h(c)K(S)(0) branching fraction is 1.4 x 10(-5) at 90% C. L. In addition, a study of the p (p) over bar pi(+pi-) invariant mass distribution in the channel B+ -> (p (p) over bar (+)pi(-))K+ results in the first observation of the decay eta(c)(2S) -> p (p) over bar pi(+)pi(-) with 12.1 sigma significance. The analysis is based on the 711 fb(-1) data sample collected by the Belle detector at the asymmetric- energy e(+)e(-) collider KEKB at the gamma(4S) resonance.

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