Energy Scan of the e^{+}e^{-}→h_{b}(nP)π^{+}π^{-} (n=1, 2) Cross Sections and Evidence for ϒ(11020) Decays into Charged Bottomoniumlike States.

R Mizuk, A Bondar,I Adachi,H Aihara,D M Asner, H Atmacan,V Aulchenko,T Aushev,R Ayad,I Badhrees,A M Bakich, E Barberio, P Behera,V Bhardwaj,B Bhuyan,J Biswal,A Bobrov, G Bonvicini,A Bozek, M Bračko, T E Browder,D Červenkov,V Chekelian,A Chen, B G Cheon,K Chilikin,R Chistov,V Chobanova,S-K Choi,Y Choi,D Cinabro,J Dalseno,M Danilov, N Dash,Z Doležal,A Drutskoy,S Eidelman,D Epifanov,T Ferber, B G Fulsom,V Gaur,A Garmash,R Gillard,Y M Goh, P Goldenzweig,B Golob,D Greenwald,T Hara, K Hayasaka, H Hayashii,W-S Hou,C-L Hsu,K Inami,G Inguglia,A Ishikawa, Y Iwasaki, I Jaegle,T Julius,K H Kang, P Katrenko,D Y Kim,H J Kim,J B Kim,K T Kim,M J Kim,S H Kim,Y J Kim,K Kinoshita,P Kodyš, S Korpar, D Kotchetkov,P Krokovny,T Kuhr,A Kuzmin,Y-J Kwon, J S Lange,C H Li,H Li,L Li,L Li Gioi,J Libby,D Liventsev, M Lubej,T Luo, M Masuda,T Matsuda,D Matvienko,K Miyabayashi,H Miyata, G B Mohanty,A Moll, E Nakano, M Nakao,T Nanut, K J Nath,K Negishi,M Niiyama,N K Nisar,S Nishida,S Ogawa, S Okuno,S L Olsen, Y Onuki,P Pakhlov,G Pakhlova,B Pal,C W Park,H Park,S Paul,T K Pedlar, R Pestotnik, M Petrič, L E Piilonen, C Pulvermacher,M Ritter, Y Sakai,S Sandilya,T Sanuki, V Savinov,T Schlüter,O Schneider, G Schnell, C Schwanda, Y Seino, D Semmler,K Senyo,O Seon,M E Sevior,V Shebalin,T-A Shibata,J-G Shiu,B Shwartz,F Simon,E Solovieva, M Starič,J Stypula,T Sumiyoshi,M Takizawa,U Tamponi,K Tanida,Y Teramoto,I Tikhomirov,K Trabelsi,M Uchida,T Uglov, Y Unno,S Uno, P Urquijo,Y Usov,C Van Hulse, G Varner,V Vorobyev,C H Wang,M-Z Wang,P Wang,X L Wang, Y Watanabe,K M Williams,E Won,J Yamaoka,Y Yamashita,J Yelton,C Z Yuan, Z P Zhang,V Zhilich,V Zhukova,V Zhulanov, A Zupanc,

Physical review letters（2016）

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摘要

Using data collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider, we measure the energy dependence of the e^{+}e^{-}→h_{b}(nP)π^{+}π^{-} (n=1, 2) cross sections from thresholds up to 11.02 GeV. We find clear ϒ(10860) and ϒ(11020) peaks with little or no continuum contribution. We study the resonant substructure of the ϒ(11020)→h_{b}(nP)π^{+}π^{-} transitions and find evidence that they proceed entirely via the intermediate isovector states Z_{b}(10610) and Z_{b}(10650). The relative fraction of these states is loosely constrained by the current data: The hypothesis that only Z_{b}(10610) is produced is excluded at the level of 3.3 standard deviations, while the hypothesis that only Z_{b}(10650) is produced is not excluded at a significant level.

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