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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 | 2019/05 |
| 形態種別 | その他 |
| 査読 | 査読あり |
| 標題 | Search for $B^0 \to X(3872) γ$ |
| 執筆形態 | その他 |
| 著者・共著者 | Belle Collaboration,P. -C. Chou,P. Chang,I. Adachi,H. Aihara,S. Al Said,D. M. Asner,H. Atmacan,V. Aulchenko,T. Aushev,R. Ayad,V. Babu,I. Badhrees,A. M. Bakich,P. Behera,J. Bennett,M. Berger,B. Bhuyan,T. Bilka,J. Biswal,A. Bobrov,A. Bozek,M. Bračko,T. E. Browder,M. Campajola,L. Cao,D. Červenkov,V. Chekelian,A. Chen,B. G. Cheon,K. Chilikin,H. E. Cho,K. Cho,S. -K. Choi,Y. Choi,S. Choudhury,D. Cinabro,S. Cunliffe,N. Dash,S. Di Carlo,Z. Doležal,T. V. Dong,S. Eidelman,D. Epifanov,J. E. Fast,T. Ferber, |
| 概要 | We report the results of a search for the decay $B^0 \to X(3872)(\to J/\psi
\pi^+ \pi^-) \gamma$. The analysis is performed on a data sample corresponding to an integrated luminosity of $711\,{\rm fb}^{-1}$ and containing $772 \times 10^6 B\bar{B}$ pairs, collected with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider running at the $\Upsilon(4S)$ resonance energy. We find no evidence for a signal and place an upper limit of $\mathcal{B}(B^0 \to X(3872)\gamma)\times \mathcal{B}(X(3872) \to J/\psi \pi^+ \pi^-) < 5.1 \times 10^{-7}$ at 90% confidence level. |
| DOI | 10.1103/PhysRevD.100.012002 |