Measurements of the branching fractions of $${\Xi }_{c}^{+}\to {\Sigma }^{+}{K}_{S}^{0}$$, $${\Xi }_{c}^{+}\to {\Xi }^{0}{\pi }^{+}$$, and $${\Xi }_{c}^{+}\to {\Xi }^{0}{K}+$$ at Belle and Belle II

A bstract Using 983.0 fb − 1 and 427.9 fb − 1 data samples collected with the Belle and Belle II detectors at the KEKB and SuperKEKB asymmetric energy e + e − colliders, respectively, we present studies of the Cabibbo-favored $${\Xi }_{c}^{+}$$ decays $${\Xi }_{c}^{+}\to {\Sigma }^{+}{K}_{S}^{0}$$ and $${\Xi }_{c}^{+}\to {\Xi }^{0}{\pi }^{+}$$ , and the singly Cabibbo-suppressed decay $${\Xi }_{c}^{+}\to {\Xi }^{0}{K}^{+}$$ . The ratios of branching fractions of $${\Xi }_{c}^{+}\to {\Sigma }^{+}{K}_{S}^{0}$$ and $${\Xi }_{c}^{+}\to {\Xi }^{0}{K}^{+}$$ relative to that of $${\Xi }_{c}^{+}\to {\Xi }^{-}{\pi }^{+}{\pi }^{+}$$ are measured for the first time, while the ratio $$\mathcal{B}({\Xi }_{c}^{+}\to {\Xi }^{0}{\pi }^{+})/\mathcal{B}({\Xi }_{c}^{+}\to {\Xi }^{-}{\pi }^{+}{\pi }^{+})$$ is also determined and improved by an order of magnitude in precision. The measured branching fraction ratios are $$\begin{array}{c}\frac{\mathcal{B}\left({\Xi }_{c}^{+}\to {\Sigma }^{+}{K}_{S}^{0}\right)}{\mathcal{B}\left({\Xi }_{c}^{+}\to {\Xi }^{-}{\pi }^{+}{\pi }^{+}\right)}=0.067\pm 0.007\pm 0.003,\\ \frac{\mathcal{B}\left({\Xi }_{c}^{+}\to {\Xi }^{0}{\pi }^{+}\right)}{\mathcal{B}\left({\Xi }_{c}^{+}\to {\Xi }^{-}{\pi }^{+}{\pi }^{+}\right)}=0.251\pm 0.005\pm 0.010,\\ \frac{\mathcal{B}\left({\Xi }_{c}^{+}\to {\Xi }^{0}{K}^{+}\right)}{\mathcal{B}\left({\Xi }_{c}^{+}\to {\Xi }^{-}{\pi }^{+}{\pi }^{+}\right)}=0.017\pm 0.003\pm 0.001.\end{array}$$ Additionally, the ratio $$\mathcal{B}({\Xi }_{c}^{+}\to {\Xi }^{0}{K}^{+})/\mathcal{B}({\Xi }_{c}^{+}\to {\Xi }^{0}{\pi }^{+})$$ is measured to be 0 . 068 ± 0 . 010 ± 0 . 004. Here, the first and second uncertainties are statistical and systematic, respectively. Multiplying the ratios by the branching fraction of the normalization mode, $$\mathcal{B}({\Xi }_{c}^{+}\to {\Xi }^{-}{\pi }^{+}{\pi }^{+})=(2.9\pm 1.3)\%$$ , we obtain the following absolute branching fractions $$\begin{array}{c}\mathcal{B}({\Xi }_{c}^{+}\to {\Sigma }^{+}{K}_{S}^{0})=(0.194\pm 0.021\pm 0.009\pm 0.087)\text{\%},\\ \mathcal{B}({\Xi }_{c}^{+}\to {\Xi }^{0}{\pi }^{+})=(0.728\pm 0.014\pm 0.027\pm 0.326)\text{\%},\\ \mathcal{B}({\Xi }_{c}^{+}\to {\Xi }^{0}{K}^{+})=(0.049\pm 0.007\pm 0.003\pm 0.022)\text{\%},\end{array}$$ where the third uncertainties are from $$\mathcal{B}({\Xi }_{c}^{+}\to {\Xi }^{-}{\pi }^{+}{\pi }^{+})$$ .

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Journal
Journal of High Energy Physics
Published
2025-08-25
DOI
https://doi.org/10.1007/jhep08(2025)195
Primary Topic
Particle physics theoretical and experimental studies
Type
article
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0.00

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article

Measurements of the branching fractions of $${\Xi }_{c}^{+}\to {\Sigma }^{+}{K}_{S}^{0}$$, $${\Xi }_{c}^{+}\to {\Xi }^{0}{\pi }^{+}$$, and $${\Xi }_{c}^{+}\to {\Xi }^{0}{K}+$$ at Belle and Belle II

K. Ravindran, E.-J. Jang, T. Lam, K. Kinoshita et al.
Journal of High Energy Physics
Particle physics theoretical and experimental studies
article

Measurements of the branching fractions of $${\Xi }_{c}^{+}\to {\Sigma }^{+}{K}_{S}^{0}$$, $${\Xi }_{c}^{+}\to {\Xi }^{0}{\pi }^{+}$$, and $${\Xi }_{c}^{+}\to {\Xi }^{0}{K}+$$ at Belle and Belle II

K. Ravindran, E.-J. Jang, T. Lam, K. Kinoshita, C. Cecchi, S. P. Maharana, P. Ecker, S. Pardi, G. Dujany, Z. Gruberová, S.-J. Cho, R. Leboucher, C. H. Kim, C. Z. Yuan, Yu Zhong, D. Ricalde Herrmann, M. Alhakami, M. Bartl, S. Longo, J. S. Lange, M. Garcia-Hernandez, C. Schwanda, T. Iijima, W. C. Yan, G. Mancinelli, R. Volpe, J. Libby, S. Marcello, M. Maggiora, K. Kumara, W. Gradl, G. Gaudino, M. Neu, D. Marcantonio, Y.-J. Kwon, Y. B. Li, S. Patra, S. A. Al‐Ghamdi, N. K. Baghel, H. Ghumaryan, Н. Акопов, S.-H. Park, A. L. Moreira De Carvalho, Y. Han, G. Raeuber, J. Kandra, A. Ishikawa, Shoichi Watanuki, Y. Jin, T. Higuchi, W. M. Song, E. Graziani, J. V. Bennett, H. Svidras, A. Sokolov, G. Sharma, A. Soffer, S. Moneta, S. Hazra, B. G. Cheon, K. Chirapatpimol, E. R. Oxford, C. Ketter, C. Lyu, J. X. Cui, S. A. De La Motte, M. Masuda, Y. Seino, P. Cheema, A. Beaubien, R. Peschke, A. Natochii, U. Tamponi, S. Yamada, Jürgen Becker, S. Bussino, T. Martinov, T. Kuhr, F. Keil, S. Mitra, M. Sobotzik, S. Stefkova, S. Korpar, R. Itoh, C. Praz, M. Mirra, C. Sfienti, K. Miyabayashi, P. Kodyš, J. Lin, Q. Y. Liu, P. L. M. Podesta-Lerma, A. Selce, H. Ono, J. Park, M. Uchida, S. Kohani, A. Di Canto, K. Park, J. A. McKenna, T. Kunigo, A. Sibidanov, J. Baudot, A. Vossen, S. Wallner, S. Sandilya, F. Simon, G. Karyan, A. Glazov, R. Maiti, V. Bertacchi, D. Y. Kim, K. Hayasaka, Y. Kulii, E. Solovieva, D. Greenwald, R. Manfredi, C. Wessel, G. De Pietro, C. Finck, R. Sobie, P. Branchini, M. Aversano, Q. Zhou, H. Junkerkalefeld, S. Jia, F. Le Diberder, M.-Z. Wang, V. Babu, T. Podobnik, Y. Guan, M. J. Lee, M. Bessner, A. Korobov, R. Mehta, V P Jagathy Raj, D. Liventsev, P. Gironella Gironell, A. Prakash, P. Goldenzweig, S. Ogawa, S.-K. Choi, M. Laurenza, S. Bettarini, D. Biswas, J. Cochran, M. Wakai, Z. Doležal, I. Adachi, D. A. Sanders, A. Rostomyan, G. Rizzo, K. H. Kang, D. Bodrov, T. Shimasaki, N. Anh Ky, T. Fillinger, S. Raiz, M. Bertemes, M. Takahashi, Y. J. Kim, C. P. Shen, S. Nishida, K. Gudkova, C.-L. Hsu, S. S. Tang, P. Leo, D. M. Asner, J.-G. Shiu, S. Prell, R. Godang, Y. Li, M. Hoek, P. Feichtinger, K.-H. Kim, L. K. Li, M. Barrett, M. Campajola, A. Kuzmin, I. Ripp-Baudot, J. Dingfelder, R. Pestotnik, R. de Sangro, K. R. Amos, K. Chilikin, W. B. Yan, H.-E. Cho, S. Lacaprara, I. Tsaklidis, M. Nayak, R. Giordano, A. Martens, M. Starič, P. Stavroulakis, D. E. Jaffe, S. Dey, T. V. Dong, B. Bhuyan, I. Ueda, M. Destefanis, K. E. Varvell, A. Boschetti, M. Reif, E. Kovalenko, K. Kojima, M. Hernández Villanueva, V. Vobbilisetti, S. Choudhury, T. Shillington, Y. Unno, Q. M. Li, D. Shtol, L. Cao, R. Tiwary, R. A. Briere, C. Miller, X. P. Xu, P. Rados, G. Finocchiaro, M. Takizawa, M. Sumihama, K. Uno, W. W. Jacobs, M. Iwasaki, A. Fodor, Y.B Li, M. Naruki, C. Kiesling, K. Tanida, H. J. Li, T. Uglov, K. Schoenning, P. Bambade, C. Mariñas, M. Dorigo, A. Budano, T. Hara, A. J. Schwartz, D. Matvienko, K. Senyo, M. Veronesi, A. Giri, R. Kowalewski, B. Yabsley, H. Hayashii, L. Corona, R. van Tonder, J. K. Ahn, W. Shan, P. Krokovny, T. Humair, K. Unger, P. Horak, K. K. Joo, L. Šantelj, B. Spruck, J. Chin, A. Bondar, A. Johnson, J. Yelton, I. Nakamura, A. Gabrielli, K. Cho, E. Prencipe, T. Kawasaki, M.-C. Chang, L. Vitale, R. Mussa, M. Hohmann, Q. Campagna, G. Bonvicini, V. Zhilich, N. Althubiti, H. Purwar, A. Passeri, O. Tittel, L. Reuter, J. S. Zhou, J. H. Yin, M. T. Hedges, F. Tenchini, J.-Y. Kim, N. Ipsita, M. Bračko, L. Zani, V. S. Vismaya, S. Uno, T. Koga, B. G. Fulsom, A. Gellrich, B. Scavino, M. Mantovano, M. T. Prim, F. Forti, S. Reiter, R. Ayad, S. Spataro, V. Savinov, F. Becherer, A. Gaz, I. Haide, A. Heidelbach, D. Meleshko, S. Privalov, I. Heredia-De La Cruz, F. Bianchi, Boyang Zhang, B. Gobbo, Zhiqing Liu, F. Meier, E. Torassa, O. Gogota, M. Nakao, L. Massaccesi, E. Bertholet, L. Zhu, X. Shi, F. Zeng, J. Skorupa, I. Domínguez Jiménez, D. Ghosh, Y. P. Liao, M. Zeyrek, J. Yuan, L. E. Piilonen, V. Gautam, M. Merola, G. Casarosa, A. Warburton, V. Gaur, T. Ferber, C. Martellini, E. Manoni, E. De La Cruz–Burelo, R. Žlebčík, R. Garg, Zijun Xu, K. Yoshihara, T. S. Lau, A. Gale, S. Banerjee, J. U. Rehman, R. HOPPE, Y. H. Ahn, A. Bożek, K. Trabelsi, G. Schnell, N. Suwonjandee, G. Pakhlova, S. Vahsen, Z. Natkaniec, R. Stroili, J. M. Roney, P. Križan, C. Madaan, S. K. Maurya, Yue Ma, C. Antonioli, I. Consigny
article en

Abstract

A bstract Using 983.0 fb − 1 and 427.9 fb − 1 data samples collected with the Belle and Belle II detectors at the KEKB and SuperKEKB asymmetric energy e + e − colliders, respectively, we present studies of the Cabibbo-favored $${\Xi }_{c}^{+}$$ decays $${\Xi }_{c}^{+}\to {\Sigma }^{+}{K}_{S}^{0}$$ and $${\Xi }_{c}^{+}\to {\Xi }^{0}{\pi }^{+}$$ , and the singly Cabibbo-suppressed decay $${\Xi }_{c}^{+}\to {\Xi }^{0}{K}^{+}$$ . The ratios of branching fractions of $${\Xi }_{c}^{+}\to {\Sigma }^{+}{K}_{S}^{0}$$ and $${\Xi }_{c}^{+}\to {\Xi }^{0}{K}^{+}$$ relative to that of $${\Xi }_{c}^{+}\to {\Xi }^{-}{\pi }^{+}{\pi }^{+}$$ are measured for the first time, while the ratio $$\mathcal{B}({\Xi }_{c}^{+}\to {\Xi }^{0}{\pi }^{+})/\mathcal{B}({\Xi }_{c}^{+}\to {\Xi }^{-}{\pi }^{+}{\pi }^{+})$$ is also determined and improved by an order of magnitude in precision. The measured branching fraction ratios are $$\begin{array}{c}\frac{\mathcal{B}\left({\Xi }_{c}^{+}\to {\Sigma }^{+}{K}_{S}^{0}\right)}{\mathcal{B}\left({\Xi }_{c}^{+}\to {\Xi }^{-}{\pi }^{+}{\pi }^{+}\right)}=0.067\pm 0.007\pm 0.003,\\ \frac{\mathcal{B}\left({\Xi }_{c}^{+}\to {\Xi }^{0}{\pi }^{+}\right)}{\mathcal{B}\left({\Xi }_{c}^{+}\to {\Xi }^{-}{\pi }^{+}{\pi }^{+}\right)}=0.251\pm 0.005\pm 0.010,\\ \frac{\mathcal{B}\left({\Xi }_{c}^{+}\to {\Xi }^{0}{K}^{+}\right)}{\mathcal{B}\left({\Xi }_{c}^{+}\to {\Xi }^{-}{\pi }^{+}{\pi }^{+}\right)}=0.017\pm 0.003\pm 0.001.\end{array}$$ Additionally, the ratio $$\mathcal{B}({\Xi }_{c}^{+}\to {\Xi }^{0}{K}^{+})/\mathcal{B}({\Xi }_{c}^{+}\to {\Xi }^{0}{\pi }^{+})$$ is measured to be 0 . 068 ± 0 . 010 ± 0 . 004. Here, the first and second uncertainties are statistical and systematic, respectively. Multiplying the ratios by the branching fraction of the normalization mode, $$\mathcal{B}({\Xi }_{c}^{+}\to {\Xi }^{-}{\pi }^{+}{\pi }^{+})=(2.9\pm 1.3)\%$$ , we obtain the following absolute branching fractions $$\begin{array}{c}\mathcal{B}({\Xi }_{c}^{+}\to {\Sigma }^{+}{K}_{S}^{0})=(0.194\pm 0.021\pm 0.009\pm 0.087)\text{\%},\\ \mathcal{B}({\Xi }_{c}^{+}\to {\Xi }^{0}{\pi }^{+})=(0.728\pm 0.014\pm 0.027\pm 0.326)\text{\%},\\ \mathcal{B}({\Xi }_{c}^{+}\to {\Xi }^{0}{K}^{+})=(0.049\pm 0.007\pm 0.003\pm 0.022)\text{\%},\end{array}$$ where the third uncertainties are from $$\mathcal{B}({\Xi }_{c}^{+}\to {\Xi }^{-}{\pi }^{+}{\pi }^{+})$$ .

Journal of High Energy PhysicsVol. 2025(8)
Twitter (United States) (US), Korea Electric Power Corporation (South Korea) (KR)
National Science Foundation, U.S. Department of Energy, Alexander von Humboldt-Stiftung, University of Tabuk, Vietnam Academy of Science and Technology, Thailand Center of Excellence in Physics, National Research Foundation of Ukraine, European Commission, National Research Foundation, Deutsche Forschungsgemeinschaft, Agence Nationale de la Recherche, Ministry of Education, Culture, Sports, Science and Technology, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Bundesministerium für Bildung und Forschung, King Saud University, Generalitat Valenciana, Korea Institute of Science and Technology, Korea Institute of Science and Technology Information, Ikerbasque, Basque Foundation for Science, Knut och Alice Wallenbergs Stiftelse, Max-Planck-Gesellschaft, Javna Agencija za Raziskovalno Dejavnost RS, Türkiye Bilimsel ve Teknolojik Araştırma Kurumu, Centre National de la Recherche Scientifique, Ministerio de Ciencia e Innovación, National Research University Higher School of Economics, Ministry of Education and Science of Ukraine, Ministry of Science and Higher Education of the Russian Federation, Istituto Nazionale di Fisica Nucleare, National Science and Technology Council, Korea Research Environment Open Network, Deutsches Elektronen-Synchrotron, Japan Society for the Promotion of Science, Akademi Sains Malaysia, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Institut National de Physique Nucléaire et de Physique des Particules
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Particle physics theoretical and experimental studies
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