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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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| 発行・発表の年月 | 2019/11 |
| 形態種別 | その他 |
| 標題 | Observation of a vector charmoniumlike state in $e^+e^- \to D^+_sD_{s1}(2536)^-+c.c.$ |
| 執筆形態 | その他 |
| 著者・共著者 | Belle Collaboration,S. Jia,C. P. Shen,C. Z. Yuan,X. L. Wang,I. Adachi,H. Aihara,D. M. Asner,H. Atmacan,V. Aulchenko,R. Ayad,V. Babu,I. Badhrees,A. M. Bakich,P. Behera,B. Bhuyan,T. Bilka,J. Biswal,A. Bobrov,G. Bonvicini,A. Bozek,M. Bračko,T. E. Browder,M. Campajola,L. Cao,D. Červenkov,P. Chang,A. Chen,B. G. Cheon,K. Chilikin,H. E. Cho,K. Cho,S. -K. Choi,Y. Choi,D. Cinabro,S. Cunliffe,G. De Nardo,F. Di Capua,S. Di Carlo,Z. Doležal,T. V. Dong,S. Eidelman,D. Epifanov,J. E. Fast,T. Ferber,B. G. Fulso |
| 概要 | Using a data sample of 921.9 fb$^{-1}$ collected with the Belle detector, we
study the process of $e^+e^-\to D^+_sD_{s1}(2536)^-+c.c.$ via initial-state radiation. We report the first observation of a vector charmoniumlike state decaying to $D^+_sD_{s1}(2536)^-+c.c.$ with a significance of 5.9$\sigma$, including the systematic uncertainties. The measured mass and width are $(4625.9^{+6.2}_{-6.0}({\rm stat.})\pm0.4({\rm syst.}))~{\rm MeV}/c^{2}$ and $(49.8^{+13.9}_{-11.5}({\rm stat.})\pm4.0({\rm syst.}))~{\rm MeV}$, respectively. The product of the $e^+e^-\to D^+_sD_{s1}(2536)^-+c.c.$ cross section and the branching fraction of $D_{s1}(2536)^-\to{\bar D}^{*0}K^-$ is measured from the $D_s \bar{D}_{s1}(2536)$ threshold to 5.59~GeV. |
| DOI | 10.1103/PhysRevD.100.111103 |
| PermalinkURL | http://arxiv.org/abs/1911.00671v1 |
| researchmap用URL | http://arxiv.org/pdf/1911.00671v1 |