학술논문
Measurements of branching fractions and asymmetry parameters of Ξ c 0 → Λ K ¯ ∗ 0 $$ {\Xi}_c^0\to \Lambda {\overline{K}}^{\ast 0} $$ , Ξ c 0 → Σ 0 K ¯ ∗ 0 $$ {\Xi}_c^0\to {\Sigma}^0{\overline{K}}^{\ast 0} $$ , and Ξ c 0 → Σ + K ∗ − $$ {\Xi}_c^0\to {\Sigma}^{+}{K}^{\ast -} $$ decays at Belle
Document Type
article
Author
The Belle collaboration; S. Jia; S. S. Tang; C. P. Shen; I. Adachi; H. Aihara; S. Al Said; D. M. Asner; V. Aulchenko; T. Aushev; R. Ayad; V. Babu; S. Bahinipati; P. Behera; J. Bennett; M. Bessner; T. Bilka; J. Biswal; A. Bobrov; G. Bonvicini; A. Bozek; M. Bračko; T. E. Browder; M. Campajola; D. Červenkov; M.-C. Chang; V. Chekelian; 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; R. Dhamija; F. Di Capua; Z. Doležal; T. V. Dong; S. Eidelman; D. Epifanov; T. Ferber; K. Flood; B. G. Fulsom; R. Garg; V. Gaur; N. Gabyshev; A. Garmash; A. Giri; P. Goldenzweig; O. Hartbrich; K. Hayasaka; H. Hayashii; W.-S. Hou; C.-L. Hsu; T. Iijima; K. Inami; A. Ishikawa; R. Itoh; M. Iwasaki; Y. Iwasaki; W. W. Jacobs; Y. Jin; K. K. Joo; G. Karyan; Y. Kato; H. Kichimi; C. H. Kim; D. Y. Kim; K.-H. Kim; S. H. Kim; Y.-K. Kim; K. Kinoshita; P. Kodyš; T. Konno; A. Korobov; S. Korpar; E. Kovalenko; P. Križan; R. Kroeger; P. Krokovny; T. Kuhr; K. Kumara; A. Kuzmin; Y.-J. Kwon; K. Lalwani; J. S. Lange; S. C. Lee; J. Li; L. K. Li; Y. B. Li; L. Li Gioi; J. Libby; K. Lieret; D. Liventsev; C. MacQueen; M. Masuda; T. Matsuda; D. Matvienko; J. T. McNeil; M. Merola; F. Metzner; K. Miyabayashi; H. Miyata; R. Mizuk; G. B. Mohanty; R. Mussa; M. Nakao; A. Natochii; L. Nayak; M. Nayak; M. Niiyama; N. K. Nisar; S. Nishida; K. Nishimura; K. Ogawa; S. Ogawa; H. Ono; Y. Onuki; P. Oskin; P. Pakhlov; G. Pakhlova; S. Pardi; H. Park; S.-H. Park; S. Patra; S. Paul; R. Pestotnik; L. E. Piilonen; T. Podobnik; V. Popov; E. Prencipe; M. T. Prim; A. Rostomyan; N. Rout; G. Russo; D. Sahoo; S. Sandilya; A. Sangal; V. Savinov; G. Schnell; C. Schwanda; Y. Seino; K. Senyo; M. E. Sevior; C. Sharma; J.-G. Shiu; A. Sokolov; E. Solovieva; M. Starič; Z. S. Stottler; M. Sumihama; T. Sumiyoshi; M. Takizawa; K. Tanida; F. Tenchini; K. Trabelsi; S. Uehara; T. Uglov; Y. Unno; K. Uno; S. Uno; P. Urquijo; Y. Usov; R. Van Tonder; G. Varner; E. Waheed; C. H. Wang; M.-Z. Wang; P. Wang; M. Watanabe; O. Werbycka; E. Won; B. D. Yabsley; W. Yan; S. B. Yang; H. Ye; J. Yelton; J. H. Yin; C. Z. Yuan; Y. Yusa; Z. P. Zhang; V. Zhilich; V. Zhukova
Source
Journal of High Energy Physics, Vol 2021, Iss 6, Pp 1-17 (2021)
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 the processes of Ξ c 0 → Λ K ¯ ∗ 0 $$ {\Xi}_c^0\to \Lambda {\overline{K}}^{\ast 0} $$ , Ξ c 0 → Σ 0 K ¯ ∗ 0 $$ {\Xi}_c^0\to {\Sigma}^0{\overline{K}}^{\ast 0} $$ , and Ξ c 0 → Σ + K ∗ − $$ {\Xi}_c^0\to {\Sigma}^{+}{K}^{\ast -} $$ for the first time. The relative branching ratios to the normalization mode of Ξ c 0 → Ξ − π + $$ {\Xi}_c^0\to {\Xi}^{-}{\pi}^{+} $$ are measured to be B Ξ c 0 → Λ K ¯ ∗ 0 / B Ξ c 0 → Ξ − π + = 0.18 ± 0.02 stat . ± 0.01 syst . , B Ξ c 0 → Σ 0 K ¯ ∗ 0 / B Ξ c 0 → Ξ − π + = 0.69 ± 0.03 stat . ± 0.03 syst . , B Ξ c 0 → Σ + K ∗ − / B Ξ c 0 → Ξ − π + = 0.34 ± 0.06 stat . ± 0.02 syst . , $$ {\displaystyle \begin{array}{c}\mathcal{B}\left({\Xi}_c^0\to \Lambda {\overline{K}}^{\ast 0}\right)/\mathcal{B}\left({\Xi}_c^0\to {\Xi}^{-}{\pi}^{+}\right)=0.18\pm 0.02\left(\mathrm{stat}.\right)\pm 0.01\left(\mathrm{syst}.\right),\\ {}\mathcal{B}\left({\Xi}_c^0\to {\Sigma}^0{\overline{K}}^{\ast 0}\right)/\mathcal{B}\left({\Xi}_c^0\to {\Xi}^{-}{\pi}^{+}\right)=0.69\pm 0.03\left(\mathrm{stat}.\right)\pm 0.03\left(\mathrm{syst}.\right),\\ {}\mathcal{B}\left({\Xi}_c^0\to {\Sigma}^{+}{K}^{\ast -}\right)/\mathcal{B}\left({\Xi}_c^0\to {\Xi}^{-}{\pi}^{+}\right)=0.34\pm 0.06\left(\mathrm{stat}.\right)\pm 0.02\left(\mathrm{syst}.\right),\end{array}} $$ where the uncertainties are statistical and systematic, respectively. We obtain B Ξ c 0 → Λ K ¯ ∗ 0 = 3.3 ± 0.3 stat . ± 0.2 syst . ± 1.0 ref . × 10 − 3 , B Ξ c 0 → Σ 0 K ¯ ∗ 0 = 12.4 ± 0.5 stat . ± 0.5 syst . ± 3.6 ref . × 10 − 3 , B Ξ c 0 → Σ + K ∗ 0 = 6.1 ± 1.0 stat . ± 0.4 syst . ± 1.8 ref . × 10 − 3 , $$ {\displaystyle \begin{array}{c}\mathcal{B}\left({\Xi}_c^0\to \Lambda {\overline{K}}^{\ast 0}\right)=\left(3.3\pm 0.3\left(\mathrm{stat}.\right)\pm 0.2\left(\mathrm{syst}.\right)\pm 1.0\left(\mathrm{ref}.\right)\right)\times {10}^{-3},\\ {}\mathcal{B}\left({\Xi}_c^0\to {\Sigma}^0{\overline{K}}^{\ast 0}\right)=\left(12.4\pm 0.5\left(\mathrm{stat}.\right)\pm 0.5\left(\mathrm{syst}.\right)\pm 3.6\left(\mathrm{ref}.\right)\right)\times {10}^{-3},\\ {}\mathcal{B}\left({\Xi}_c^0\to {\Sigma}^{+}{K}^{\ast 0}\right)=\left(6.1\pm 1.0\left(\mathrm{stat}.\right)\pm 0.4\left(\mathrm{syst}.\right)\pm 1.8\left(\mathrm{ref}.\right)\right)\times {10}^{-3},\end{array}} $$ where the uncertainties are statistical, systematic, and from B Ξ c 0 → Ξ − π + $$ \mathcal{B}\left({\Xi}_c^0\to {\Xi}^{-}{\pi}^{+}\right) $$ , respectively. The asymmetry parameters α Ξ c 0 → Λ K ¯ ∗ 0 $$ \alpha \left({\Xi}_c^0\to \Lambda {\overline{K}}^{\ast 0}\right) $$ and α Ξ c 0 → Σ + K ∗ − $$ \alpha \left({\Xi}_c^0\to {\Sigma}^{+}{K}^{\ast -}\right) $$ are 0.15 ± 0.22(stat.) ± 0.04(syst.) and −0.52 ± 0.30(stat.) ± 0.02(syst.), respectively, where the uncertainties are statistical followed by systematic.