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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 | 2017/04 |
| 形態種別 | その他 |
| 標題 | Observation of an alternative $χ_{c0}(2P)$ candidate in $e^+ e^- \rightarrow J/ψD \bar{D}$ |
| 執筆形態 | その他 |
| 著者・共著者 | Belle Collaboration,K. Chilikin,I. Adachi,H. Aihara,S. Al Said,D. M. Asner,V. Aulchenko,R. Ayad,V. Babu,I. Badhrees,A. M. Bakich,V. Bansal,E. Barberio,D. Besson,V. Bhardwaj,B. Bhuyan,J. Biswal,A. Bobrov,A. Bondar,A. Bozek,M. Bračko,T. E. Browder,D. Červenkov,V. Chekelian,A. Chen,B. G. Cheon,K. Cho,Y. Choi,D. Cinabro,N. Dash,S. Di Carlo,Z. Doležal,Z. Drásal,D. Dutta,S. Eidelman,H. Farhat,J. E. Fast,T. Ferber,B. G. Fulsom,V. Gaur,N. Gabyshev,A. Garmash,R. Gillard,P. Goldenzweig,J. Haba,T. Hara,K. |
| 概要 | We perform a full amplitude analysis of the process $e^+ e^- \rightarrow
J/\psi D \bar{D}$, where $D$ refers to either $D^0$ or $D^+$. A new charmoniumlike state $X^*(3860)$ that decays to $D \bar{D}$ is observed with a significance of $6.5\sigma$. Its mass is ($3862^{+26}_{-32}{}^{+40}_{-13}$) MeV/$c^2$ and width is ($201^{+154}_{-67}{}^{+88}_{-82}$) MeV. The $J^{PC}=0^{++}$ hypothesis is favored over the $2^{++}$ hypothesis at the level of $2.5\sigma$. The analysis is based on the 980 $\mathrm{fb}^{-1}$ data sample collected by the Belle detector at the asymmetric-energy $e^+ e^-$ collider KEKB. |
| DOI | 10.1103/PhysRevD.95.112003 |
| PermalinkURL | http://arxiv.org/abs/1704.01872v3 |
| researchmap用URL | http://arxiv.org/pdf/1704.01872v3 |