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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 | 2021/08 |
| 形態種別 | その他 |
| 標題 | Measurement of the branching fraction of $Λ_c^+ \to p ω$ decay at Belle |
| 執筆形態 | その他 |
| 著者・共著者 | Belle Collaboration,S. X. Li,L. K. Li,C. P. Shen,I. Adachi,H. Aihara,S. Al Said,D. M. Asner,T. Aushev,P. Behera,K. Belous,J. Bennett,M. Bessner,V. Bhardwaj,B. Bhuyan,T. Bilka,J. Biswal,A. Bobrov,D. Bodrov,J. Borah,A. Bozek,M. Bračko,P. Branchini,T. E. Browder,A. Budano,M. Campajola,D. Červenkov,M. -C. Chang,P. Chang,A. Chen,B. G. Cheon,K. Chilikin,H. E. Cho,K. Cho,S. -J. Cho,S. -K. Choi,Y. Choi,S. Choudhury,D. Cinabro,S. Cunliffe,S. Das,G. De Nardo,G. De Pietro,R. Dhamija,F. Di Capua,Z. Doležal, |
| 概要 | Using 980.6 $\rm fb^{-1}$ of data collected with the Belle detector operating
at the KEKB asymmetric-energy $e^+e^-$ collider, we present a measurement of the branching fraction of the singly Cabibbo-suppressed decay $\Lambda_c^+ \to p \omega$. A clear $\Lambda_c^+$ signal is observed for $\Lambda_c^+ \to p \omega$ with a statistical significance of 9.1 standard deviations, and we measure the ratio of branching fractions ${\cal B}(\Lambda_c^+ \to p \omega)/{\cal B}(\Lambda_c^+ \to p K^- \pi^+) = (1.32 \pm 0.12 (\rm stat) \pm 0.10 (\rm syst))\times 10^{-2}$, from which we infer the branching fraction ${\cal B}(\Lambda_c^+ \to p \omega) = (8.27 \pm 0.75 (\rm stat) \pm 0.62 (\rm syst) \pm 0.42 (\rm ref))\times 10^{-4}$. The first quoted uncertainty is statistical, the second systematic, and the third from the reference mode $\Lambda_c^+ \to p K^- \pi^+$. |
| DOI | 10.1103/PhysRevD.104.072008 |
| PermalinkURL | http://arxiv.org/abs/2108.11301v2 |
| researchmap用URL | http://arxiv.org/pdf/2108.11301v2 |