新山　雅之
   所属   京都産業大学  理学部 物理科学科
   職種   教授
発行・発表の年月 2021/06
形態種別 その他
標題 Evidence for the decay $Ω_{c}^{0} \to π^+Ω(2012)^- \to π^+ (\bar{K}Ξ)^{-}$
執筆形態 その他
著者・共著者 Belle Collaboration,Y. Li,S. S. Tang,S. Jia,C. P. Shen,I. Adachi,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. Bozek,M. Bračko,P. Branchini,T. E. Browder,A. Budano,M. Campajola,D. Červenkov,M. -C. Chang,P. Chang,V. Chekelian,A. Chen,B. G. Cheon,K. Chilikin,H. E. Cho,K. Cho,S. -J. Cho,Y. Choi,S. Choudhury,D. Cinabro,S. Cunliffe,S. Das,N. Dash,G. De Nardo,G. De Pietro,F. Di Capua,Z. Doležal,T. V. Dong,D.
概要 Using a data sample of 980~fb$^{-1}$ collected with the Belle detector
operating at the KEKB asymmetric-energy $e^+e^-$ collider, we present evidence
for the $\Omega(2012)^-$ in the resonant substructure of $\Omega_{c}^{0} \to
\pi^+ (\bar{K}\Xi)^{-}$ ($(\bar{K}\Xi)^{-}$ = $K^-\Xi^0$ + $\bar{K}^0 \Xi^-$)
decays. The significance of the $\Omega(2012)^-$ signal is 4.2$\sigma$ after
considering the systematic uncertainties. The ratio of the branching fraction
of $\Omega_{c}^{0} \to \pi^{+} \Omega(2012)^- \to \pi^+ (\bar{K}\Xi)^{-}$
relative to that of $\Omega_{c}^{0} \to \pi^{+} \Omega^-$ is calculated to be
0.220 $\pm$ 0.059(stat.) $\pm$ 0.035(syst.). The individual ratios of the
branching fractions of the two isospin modes are also determined, and found to
be ${\cal B}(\Omega_{c}^0 \to \pi^+ \Omega(2012)^-) \times {\cal
B}(\Omega(2012)^- \to K^-\Xi^0)/{\cal B}(\Omega_{c}^0 \to \pi^+ K^- \Xi^0)$ =
(9.6 $\pm$ 3.2(stat.) $\pm$ 1.8(syst.))\% and ${\cal B}(\Omega_{c}^0 \to \pi^+
\Omega(2012)^-) \times {\cal B}(\Omega(2012)^- \to \bar{K}^0 \Xi^-)/{\cal
B}(\Omega_{c}^0 \to \pi^+ \bar{K}^0 \Xi^-)$ = (5.5 $\pm$ 2.8(stat.) $\pm$
0.7(syst.))\%.
DOI 10.1103/PhysRevD.104.052005
PermalinkURL http://arxiv.org/abs/2106.00892v1
researchmap用URL http://arxiv.org/pdf/2106.00892v1