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新山 雅之 所属 京都産業大学 理学部 物理科学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2011 |
| 形態種別 | その他 |
| 査読 | 査読あり |
| 標題 | Observation of two charged bottomonium-like resonances |
| 執筆形態 | その他 |
| 掲載誌名 | Proceedings of the 9th International Conference on Flavor Physics and CP Violation, FPCP 2011 |
| 著者・共著者 | I. Adachi,K. Adamczyk,H. Aihara,K. Arinstein,Y. Arita,D. M. Asner,T. Aso,V. Aulchenko,T. Aushev,T. Aziz,A. M. Bakich,V. Balagura,Y. Ban,E. Barberio,A. Bay,I. Bedny,M. Belhorn,K. Belous,V. Bhardwaj,B. Bhuyan,M. Bischofberger,S. Blyth,A. Bondar,G. Bonvicini,A. Bozek,M. Bračko,J. Brodzicka,O. Brovchenko,T. E. Browder,M. C. Chang,P. Chang,Y. Chao,A. Chen,K. F. Chen,P. Chen,B. G. Cheon,R. Chistov,I. S. Cho,K. Cho,K. S. Choi,S. K. Choi,Y. Choi,J. Crnkovic,J. Dalseno,M. Danilov,A. Das,Z. Doležal,Z. Drá |
| 概要 | We report the observation of two narrow structures at 10610 MeV/c 2 and 10650 MeV/c2 in the π ±γ(nS) (n = 1,2,3) and π±hb(mP) (m = 1,2) mass spectra that are produced in association with a single charged pion in γ(5S) decays. The measured masses and widths of the two structures averaged over the five final states are M1 = 10608.4 ± 2.0MeV/c2, γ1 = 15.6 ± 2.5 MeV and M 2 = 10653.2 ± 1.5 MeV/c2, γ2 = 14.4 ±3.2 MeV. Analysis favors quantum numbers of IG(J P)=1+(1+) for both states. The results are obtained with a 121.4 fb-1 data sample collected with the Belle detector near the γ(5S) resonance at the KEKB asymmetric-energy e+e- collider. |