학술논문
Evidence for the singly Cabibbo-suppressed decay Ω c 0 → Ξ − π + $$ {\Omega}_c^0\to {\Xi}^{-}{\pi}^{+} $$ and search for Ω c 0 → Ξ − K + $$ {\Omega}_c^0\to {\Xi}^{-}{K}^{+} $$ and Ω − K + decays at Belle
Document Type
article
Author
The Belle collaboration; X. Han; S. Jia; L. Yuan; C. P. Shen; I. Adachi; J. K. Ahn; H. Aihara; D. M. Asner; T. Aushev; R. Ayad; V. Babu; S. Bahinipati; Sw. Banerjee; P. Behera; K. Belous; J. Bennett; M. Bessner; V. Bhardwaj; T. Bilka; D. Biswas; D. Bodrov; J. Borah; 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.-K. Choi; Y. Choi; S. Choudhury; D. Cinabro; G. De Nardo; G. De Pietro; R. Dhamija; F. Di Capua; Z. Doležal; T. V. Dong; D. Epifanov; T. Ferber; D. Ferlewicz; B. G. Fulsom; V. Gaur; A. Giri; P. Goldenzweig; E. Graziani; T. Gu; C. Hadjivasiliou; T. Hara; K. Hayasaka; H. Hayashii; W.-S. Hou; C.-L. Hsu; T. Iijima; K. Inami; N. Ipsita; A. Ishikawa; R. Itoh; M. Iwasaki; W. W. Jacobs; E.-J. Jang; Q. P. Ji; Y. Jin; A. B. Kaliyar; C. Kiesling; C. H. Kim; D. Y. Kim; Y.-K. Kim; K. Kinoshita; P. Kodyš; T. Konno; A. Korobov; S. Korpar; E. Kovalenko; P. Križan; P. Krokovny; T. Kuhr; M. Kumar; R. Kumar; K. Kumara; Y.-J. Kwon; T. Lam; M. Laurenza; S. C. Lee; C. H. Li; J. Li; L. K. Li; S. X. Li; Y. Li; Y. B. Li; L. Li Gioi; J. Libby; K. Lieret; M. Masuda; S. K. Maurya; M. Merola; K. Miyabayashi; R. Mizuk; G. B. Mohanty; R. Mussa; I. Nakamura; M. Nakao; H. Nakazawa; Z. Natkaniec; A. Natochii; N. K. Nisar; S. Nishida; S. Ogawa; H. Ono; Y. Onuki; G. Pakhlova; H. Park; J. Park; S. Patra; S. Paul; T. K. Pedlar; R. Pestotnik; L. E. Piilonen; E. Prencipe; M. T. Prim; N. Rout; G. Russo; S. Sandilya; L. Santelj; V. Savinov; G. Schnell; J. Schueler; C. Schwanda; Y. Seino; K. Senyo; M. E. Sevior; W. Shan; M. Shapkin; C. Sharma; J.-G. Shiu; B. Shwartz; E. Solovieva; M. Starič; M. Sumihama; T. Sumiyoshi; M. Takizawa; K. Tanida; F. Tenchini; K. Trabelsi; M. Uchida; T. Uglov; Y. Unno; K. Uno; S. Uno; P. Urquijo; S. E. Vahsen; R. van Tonder; G. Varner; A. Vinokurova; X. L. Wang; E. Won; B. D. Yabsley; W. Yan; S. B. Yang; J. Yelton; J. H. Yin; C. Z. Yuan; Z. P. Zhang; V. Zhilich; V. Zhukova
Source
Journal of High Energy Physics, Vol 2023, Iss 1, Pp 1-14 (2023)
Subject
Language
English
ISSN
1029-8479
Abstract
Abstract Using a data sample of 980 fb −1 collected with the Belle detector at the KEKB asymmetric-energy e + e − collider, we study for the first time the singly Cabibbo-suppressed decays Ω c 0 → Ξ − π + $$ {\Omega}_c^0\to {\Xi}^{-}{\pi}^{+} $$ and Ω − K + and the doubly Cabibbo-suppressed decay Ω c 0 → Ξ − K + $$ {\Omega}_c^0\to {\Xi}^{-}{K}^{+} $$ . Evidence for an Ω c 0 $$ {\Omega}_c^0 $$ signal in the Ω c 0 $$ {\Omega}_c^0 $$ → Ξ − π + mode is reported with a significance of 4.5σ including systematic uncertainties. The ratio of branching fractions to the normalization mode Ω c 0 $$ {\Omega}_c^0 $$ → Ω − π + is measured to be B Ω c 0 → Ξ − π + / B Ω c 0 → Ω − π + = 0.253 ± 0.052 stat . ± 0.030 syst . . $$ \mathcal{B}\left({\Omega}_c^0\to {\Xi}^{-}{\pi}^{+}\right)/\mathcal{B}\left({\Omega}_c^0\to {\Omega}^{-}{\pi}^{+}\right)=0.253\pm 0.052\left(\textrm{stat}.\right)\pm 0.030\left(\textrm{syst}.\right). $$ No significant signals of Ω c 0 → Ξ − K + $$ {\Omega}_c^0\to {\Xi}^{-}{K}^{+} $$ and Ω − K + modes are found. The upper limits at 90% confidence level on ratios of branching fractions are determined to be B Ω c 0 → Ξ − K + / B Ω c 0 → Ω − π + < 0.070 $$ \mathcal{B}\left({\Omega}_c^0\to {\Xi}^{-}{K}^{+}\right)/\mathcal{B}\left({\Omega}_c^0\to {\Omega}^{-}{\pi}^{+}\right)