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Measurements of the branching fractions of $Ξ_{c}^{0} \to Λ K_{S}^{0}$ , $Ξ_{c}^{0} \to Σ^{0} K_{S}^{0}$ , and $Ξ_{c}^{0} \to Σ^{+} K^{-}$ decays at Belle

Y. Li¹⁴, J. X. Cui¹⁴, S. Jia¹⁴, C. P. Shen ¹⁴, I. Adachi^22,18, J. K. Ahn⁴⁷, H. Aihara⁹³, S. Al Said^86,44, D. M. Asner³ et al. (Belle Collaboration)

D. M. Asner³, H. Atmacan⁸, T. Aushev²⁴, R. Ayad⁸⁶, V. Babu⁹, S. Bahinipati²⁸, P. Behera³¹, K. Belous³⁵, J. Bennett⁵⁹, M. Bessner²¹, V. Bhardwaj²⁷, B. Bhuyan²⁹, T. Bilka⁵, A. Bobrov^4,72, D. Bodrov^24,50, G. Bonvicini⁹⁷, J. Borah²⁹, A. Bozek⁶⁸, M. Bračko^56,41, P. Branchini³⁷, T. E. Browder²¹, A. Budano³⁷, M. Campajola^36,64, D. Červenkov⁵, M.-C. Chang¹³, P. Chang⁶⁷, A. Chen⁶⁶, B. G. Cheon²⁰, K. Chilikin⁵⁰, H. E. Cho²⁰, K. Cho⁴⁶, S.-J. Cho⁹⁹, S.-K. Choi⁷, Y. Choi⁸⁴, S. Choudhury³⁹, D. Cinabro⁹⁷, S. Cunliffe⁹, S. Das⁵⁵, G. De Nardo^36,64, G. De Pietro³⁷, R. Dhamija³⁰, F. Di Capua^36,64, J. Dingfelder², Z. Doležal⁵, T. V. Dong¹¹, D. Dossett⁵⁸, D. Epifanov^4,72, T. Ferber⁹, A. Frey¹⁷, B. G. Fulsom⁷⁴, R. Garg⁷⁵, V. Gaur⁹⁶, N. Gabyshev^4,72, A. Giri³⁰, P. Goldenzweig⁴², T. Gu⁷⁶, K. Gudkova^4,72, C. Hadjivasiliou⁷⁴, S. Halder⁸⁷, O. Hartbrich²¹, K. Hayasaka⁷⁰, H. Hayashii⁶⁵, M. T. Hedges²¹, W.-S. Hou⁶⁷, C.-L. Hsu⁸⁵, T. Iijima^63,62, K. Inami⁶², G. Inguglia³⁴, A. Ishikawa^22,18, R. Itoh^22,18, M. Iwasaki⁷³, Y. Iwasaki²², W. W. Jacobs³², E.-J. Jang¹⁹, Y. Jin⁹³, K. K. Joo⁶, J. Kahn⁴², A. B. Kaliyar⁸⁷, T. Kawasaki⁴⁵, C. Kiesling⁵⁷, C. H. Kim²⁰, D. Y. Kim⁸³, K.-H. Kim⁹⁹, Y.-K. Kim⁹⁹, K. Kinoshita⁸, P. Kodyš⁵, T. Konno⁴⁵, A. Korobov^4,72, S. Korpar^56,41, E. Kovalenko^4,72, P. Križan^52,41, R. Kroeger⁵⁹, P. Krokovny^4,72, T. Kuhr⁵³, M. Kumar⁵⁵, R. Kumar⁷⁷, K. Kumara⁹⁷, A. Kuzmin^4,72,50, Y.-J. Kwon⁹⁹, Y.-T. Lai⁴³, T. Lam⁹⁶, J. S. Lange¹⁵, M. Laurenza^37,80, S. C. Lee⁴⁹, C. H. Li⁵¹, J. Li⁴⁹, L. K. Li⁸, Y. B. Li¹⁴, L. Li Gioi⁵⁷, J. Libby³¹, K. Lieret⁵³, D. Liventsev^97,22, A. Martini⁹, M. Masuda^92,78, T. Matsuda⁶⁰, D. Matvienko^4,72,50, F. Meier¹⁰, M. Merola^36,64, F. Metzner⁴², K. Miyabayashi⁶⁵, R. Mizuk^50,24, G. B. Mohanty⁸⁷, R. Mussa³⁸, M. Nakao^22,18, Z. Natkaniec⁶⁸, A. Natochii²¹, L. Nayak³⁰, M. Nayak⁸⁹, M. Niiyama⁴⁸, N. K. Nisar³, S. Nishida^22,18, K. Ogawa⁷⁰, S. Ogawa⁹⁰, H. Ono^69,70, P. Oskin⁵⁰, P. Pakhlov^50,61, G. Pakhlova^24,50, T. Pang⁷⁶, S. Pardi³⁶, S.-H. Park²², S. Patra²⁷, S. Paul^88,57, T. K. Pedlar⁵⁴, R. Pestotnik⁴¹, L. E. Piilonen⁹⁶, T. Podobnik^52,41, V. Popov²⁴, E. Prencipe²⁵, M. T. Prim², M. Röhrken⁹, A. Rostomyan⁹, N. Rout³¹, G. Russo⁶⁴, D. Sahoo³⁹, S. Sandilya³⁰, A. Sangal⁸, L. Santelj^52,41, T. Sanuki⁹¹, V. Savinov⁷⁶, G. Schnell^1,26, C. Schwanda³⁴, Y. Seino⁷⁰, K. Senyo⁹⁸, M. E. Sevior⁵⁸, M. Shapkin³⁵, C. Sharma⁵⁵, J.-G. Shiu⁶⁷, B. Shwartz^4,72, J. B. Singh^75,*, A. Sokolov³⁵, E. Solovieva⁵⁰, S. Stanič⁷¹, M. Starič⁴¹, Z. S. Stottler⁹⁶, J. F. Strube⁷⁴, M. Sumihama¹⁶, T. Sumiyoshi⁹⁵, M. Takizawa^82,23,79, U. Tamponi³⁸, K. Tanida⁴⁰, F. Tenchini⁹, M. Uchida⁹⁴, Y. Unno²⁰, K. Uno⁷⁰, S. Uno^22,18, P. Urquijo⁵⁸, Y. Usov^4,72, R. Van Tonder², G. Varner²¹, A. Vinokurova^4,72, E. Waheed²², E. Wang⁷⁶, M.-Z. Wang⁶⁷, M. Watanabe⁷⁰, S. Watanuki⁹⁹, O. Werbycka⁶⁸, E. Won⁴⁷, B. D. Yabsley⁸⁵, W. Yan⁸¹, S. B. Yang⁴⁷, H. Ye⁹, J. Yelton¹², C. Z. Yuan³³, Y. Zhai³⁹, Z. P. Zhang⁸¹, V. Zhilich^4,72, and V. Zhukova⁵⁰ (Belle Collaboration)

¹Department of Physics, University of the Basque Country UPV/EHU, 48080 Bilbao
²University of Bonn, 53115 Bonn
³Brookhaven National Laboratory, Upton, New York 11973
⁴Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090
⁵Faculty of Mathematics and Physics, Charles University, 121 16 Prague
⁶Chonnam National University, Gwangju 61186
⁷Chung-Ang University, Seoul 06974
⁸University of Cincinnati, Cincinnati, Ohio 45221
⁹Deutsches Elektronen–Synchrotron, 22607 Hamburg
¹⁰Duke University, Durham, North Carolina 27708
¹¹Institute of Theoretical and Applied Research (ITAR), Duy Tan University, Hanoi 100000
¹²University of Florida, Gainesville, Florida 32611
¹³Department of Physics, Fu Jen Catholic University, Taipei 24205
¹⁴Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, Shanghai 200443
¹⁵Justus-Liebig-Universität Gießen, 35392 Gießen
¹⁶Gifu University, Gifu 501-1193
¹⁷II. Physikalisches Institut, Georg-August-Universität Göttingen, 37073 Göttingen
¹⁸SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193
¹⁹Gyeongsang National University, Jinju 52828
²⁰Department of Physics and Institute of Natural Sciences, Hanyang University, Seoul 04763
²¹University of Hawaii, Honolulu, Hawaii 96822
²²High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801
²³J-PARC Branch, KEK Theory Center, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801
²⁴National Research University Higher School of Economics, Moscow 101000
²⁵Forschungszentrum Jülich, 52425 Jülich
²⁶IKERBASQUE, Basque Foundation for Science, 48013 Bilbao
²⁷Indian Institute of Science Education and Research Mohali, SAS Nagar, 140306
²⁸Indian Institute of Technology Bhubaneswar, Satya Nagar 751007
²⁹Indian Institute of Technology Guwahati, Assam 781039
³⁰Indian Institute of Technology Hyderabad, Telangana 502285
³¹Indian Institute of Technology Madras, Chennai 600036
³²Indiana University, Bloomington, Indiana 47408
³³Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049
³⁴Institute of High Energy Physics, Vienna 1050
³⁵Institute for High Energy Physics, Protvino 142281
³⁶INFN–Sezione di Napoli, I-80126 Napoli
³⁷INFN–Sezione di Roma Tre, I-00146 Roma
³⁸INFN–Sezione di Torino, I-10125 Torino
³⁹Iowa State University, Ames, Iowa 50011
⁴⁰Advanced Science Research Center, Japan Atomic Energy Agency, Naka 319-1195
⁴¹J. Stefan Institute, 1000 Ljubljana
⁴²Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe
⁴³Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Kashiwa 277-8583
⁴⁴Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589
⁴⁵Kitasato University, Sagamihara 252-0373
⁴⁶Korea Institute of Science and Technology Information, Daejeon 34141
⁴⁷Korea University, Seoul 02841
⁴⁸Kyoto Sangyo University, Kyoto 603-8555
⁴⁹Kyungpook National University, Daegu 41566
⁵⁰P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991
⁵¹Liaoning Normal University, Dalian 116029
⁵²Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana
⁵³Ludwig Maximilians University, 80539 Munich
⁵⁴Luther College, Decorah, Iowa 52101
⁵⁵Malaviya National Institute of Technology Jaipur, Jaipur 302017
⁵⁶Faculty of Chemistry and Chemical Engineering, University of Maribor, 2000 Maribor
⁵⁷Max-Planck-Institut für Physik, 80805 München
⁵⁸School of Physics, University of Melbourne, Victoria 3010
⁵⁹University of Mississippi, University, Mississippi 38677
⁶⁰University of Miyazaki, Miyazaki 889-2192
⁶¹Moscow Physical Engineering Institute, Moscow 115409
⁶²Graduate School of Science, Nagoya University, Nagoya 464-8602
⁶³Kobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602
⁶⁴Università di Napoli Federico II, I-80126 Napoli
⁶⁵Nara Women’s University, Nara 630-8506
⁶⁶National Central University, Chung-li 32054
⁶⁷Department of Physics, National Taiwan University, Taipei 10617
⁶⁸H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342
⁶⁹Nippon Dental University, Niigata 951-8580
⁷⁰Niigata University, Niigata 950-2181
⁷¹University of Nova Gorica, 5000 Nova Gorica
⁷²Novosibirsk State University, Novosibirsk 630090
⁷³Osaka City University, Osaka 558-8585
⁷⁴Pacific Northwest National Laboratory, Richland, Washington 99352
⁷⁵Panjab University, Chandigarh 160014
⁷⁶University of Pittsburgh, Pittsburgh, Pennsylvania 15260
⁷⁷Punjab Agricultural University, Ludhiana 141004
⁷⁸Research Center for Nuclear Physics, Osaka University, Osaka 567-0047
⁷⁹Meson Science Laboratory, Cluster for Pioneering Research, RIKEN, Saitama 351-0198
⁸⁰Dipartimento di Matematica e Fisica, Università di Roma Tre, I-00146 Roma
⁸¹Department of Modern Physics and State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026
⁸²Showa Pharmaceutical University, Tokyo 194-8543
⁸³Soongsil University, Seoul 06978
⁸⁴Sungkyunkwan University, Suwon 16419
⁸⁵School of Physics, University of Sydney, New South Wales 2006
⁸⁶Department of Physics, Faculty of Science, University of Tabuk, Tabuk 71451
⁸⁷Tata Institute of Fundamental Research, Mumbai 400005
⁸⁸Department of Physics, Technische Universität München, 85748 Garching
⁸⁹School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978
⁹⁰Toho University, Funabashi 274-8510
⁹¹Department of Physics, Tohoku University, Sendai 980-8578
⁹²Earthquake Research Institute, University of Tokyo, Tokyo 113-0032
⁹³Department of Physics, University of Tokyo, Tokyo 113-0033
⁹⁴Tokyo Institute of Technology, Tokyo 152-8550
⁹⁵Tokyo Metropolitan University, Tokyo 192-0397
⁹⁶Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
⁹⁷Wayne State University, Detroit, Michigan 48202
⁹⁸Yamagata University, Yamagata 990-8560
⁹⁹Yonsei University, Seoul 03722

^*Also at University of Petroleum and Energy Studies, Dehradun 248007.

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Phys. Rev. D 105, L011102 – Published 6 January, 2022

DOI: https://doi.org/10.1103/PhysRevD.105.L011102

Abstract

Using the entire data sample of $980 {fb}^{- 1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^{+} e^{-}$ collider, we present measurements of the branching fractions of the Cabibbo-favored decays $Ξ_{c}^{0} \to Λ K_{S}^{0}$ , $Ξ_{c}^{0} \to Σ^{0} K_{S}^{0}$ , and $Ξ_{c}^{0} \to Σ^{+} K^{-}$ . Taking the decay $Ξ_{c}^{0} \to Ξ^{-} π^{+}$ as the normalization mode, we measure the branching fraction ratio $B (Ξ_{c}^{0} \to Λ K_{S}^{0}) / B (Ξ_{c}^{0} \to Ξ^{-} π^{+}) = 0.229 \pm 0.008 \pm 0.012$ with improved precision, and measure the branching fraction ratios $B (Ξ_{c}^{0} \to Σ^{0} K_{S}^{0}) / B (Ξ_{c}^{0} \to Ξ^{-} π^{+}) = 0.038 \pm 0.006 \pm 0.004$ and $B (Ξ_{c}^{0} \to Σ^{+} K^{-}) / B (Ξ_{c}^{0} \to Ξ^{-} π^{+}) = 0.123 \pm 0.007 \pm 0.010$ for the first time. Taking into account the branching fraction of the normalization mode, the absolute branching fractions are determined to be $B (Ξ_{c}^{0} \to Λ K_{S}^{0}) = (3.27 \pm 0.11 \pm 0.17 \pm 0.73) \times 10^{- 3}$ , $B (Ξ_{c}^{0} \to Σ^{0} K_{S}^{0}) = (0.54 \pm 0.09 \pm 0.06 \pm 0.12) \times 10^{- 3}$ , and $B (Ξ_{c}^{0} \to Σ^{+} K^{-}) = (1.76 \pm 0.10 \pm 0.14 \pm 0.39) \times 10^{- 3}$ . The first and second uncertainties above are statistical and systematic, respectively, while the third ones arise from the uncertainty of the branching fraction of $Ξ_{c}^{0} \to Ξ^{-} π^{+}$ .

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References (25)

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Phys. Rev. D 105, L011102– Published 6 January, 2022

Vol. 105, Iss. 1 — 1 January 2022

Received 17 November 2021
Accepted 14 December 2021

DOI: https://doi.org/10.1103/PhysRevD.105.L011102

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

Published by the American Physical Society

Physical Review D

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Measurements of the branching fractions of $Ξ_{c}^{0} \to Λ K_{S}^{0}$ , $Ξ_{c}^{0} \to Σ^{0} K_{S}^{0}$ , and $Ξ_{c}^{0} \to Σ^{+} K^{-}$ decays at Belle

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Measurements of the branching fractions of Ξc0→ΛKS0, Ξc0→Σ0KS0, and Ξc0→Σ+K− decays at Belle

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Measurements of the branching fractions of $Ξ_{c}^{0} \to Λ K_{S}^{0}$ , $Ξ_{c}^{0} \to Σ^{0} K_{S}^{0}$ , and $Ξ_{c}^{0} \to Σ^{+} K^{-}$ decays at Belle