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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 | 2020/12 |
| 形態種別 | その他 |
| 標題 | Measurement of the Resonant and Non-Resonant Branching Ratios in $Ξ_{c}^{0} \rightarrow Ξ^{0} K^+ K^-$ |
| 執筆形態 | その他 |
| 著者・共著者 | J. T. McNeil,J. Yelton,J. Bennett,I. Adachi,K. Adamczyk,J. K. Ahn,H. Aihara,S. Al Said,D. M. Asner,H. Atmacan,V. Aulchenko,T. Aushev,R. Ayad,V. Babu,S. Bahinipati,P. Behera,M. Bessner,T. Bilka,J. Biswal,A. Bobrov,G. Bonvicini,A. Bozek,M. Bracko,T. E. Browder,M. Campajola,L. Cao,D. Cervenkov,P. Chang,V. Chekelian,A. Chen,B. G. Cheon,K. Chilikin,K. Cho,S. J. Cho,S. K. Choi,Y. Choi,S. Choudhury,D. Cinabro,S. Cunliffe,S. Das,N. Dash,G. De Nardo,R. Dhamija,F. Di Capua,Z. Dolezal,T. V. Dong,S. Eidelma |
| 概要 | Using the entire data sample of $980$ $fb^{-1}$ integrated luminosity
collected with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider, we present an amplitude analysis measuring the branching fractions of the Cabibbo-allowed, $W$-exchange resonant decay $\Xi_{c}^{0} \rightarrow \Xi^{0} \phi (\to K^+ K^-)$ with a polarized $\phi$ and the non-resonant decay via a direct process $\Xi_{c}^{0} \rightarrow \Xi^{0} K^+ K^-$. We present these measurements, relative to the normalization mode $\Xi^{-}\pi^{+}$, and find branching ratios $\frac{\mathcal{B}(\Xi_{c}^{0} \rightarrow \Xi^{0} \phi (\rightarrow K^{+}K^{-}))}{\mathcal{B}(\Xi_{c}^{0} \rightarrow \Xi^{-} \pi^{+})} = 0.036 \pm 0.004 (stat.) \pm 0.002 (syst.)$ and $\frac{\mathcal{B}(\Xi_{c}^{0} \rightarrow \Xi^{0} K^{+} K^{-})}{\mathcal{B}(\Xi_{c}^{0} \rightarrow \Xi^{-} \pi^{+})} = 0.039 \pm 0.004 (stat.) \pm 0.002 (syst.)$ which suggest that only minor cusping peaks occur in the combinatorial background of $\Omega^{*-} \to \Xi^{0}K^{-}$ due to these $\Xi_{c}^{0}$ decays. |
| DOI | 10.1103/PhysRevD.103.112002 |
| PermalinkURL | http://arxiv.org/abs/2012.05607v2 |
| researchmap用URL | http://arxiv.org/pdf/2012.05607v2 |