Observations of the singly Cabibbo-suppressed decays $$ {\Xi}_c^{+}\to p{K}_S^0 $$, $$ {\Xi}_c^{+}\to \Lambda {\pi}^{+} $$, and $$ {\Xi}_c^{+}\to {\Sigma}^0{\pi}^{+} $$ at Belle and Belle II

A bstract Using data samples of 983.0 fb − 1 and 427.9 fb − 1 accumulated with the Belle and Belle II detectors operating at the KEKB and SuperKEKB asymmetric-energy e + e − colliders, singly Cabibbo-suppressed decays $$ {\Xi}_c^{+}\to p{K}_S^0 $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:mi>p</mml:mi> <mml:msubsup> <mml:mi>K</mml:mi> <mml:mi>S</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math> , $$ {\Xi}_c^{+}\to \Lambda {\pi}^{+} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:mi>Λ</mml:mi> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> </mml:math> , and $$ {\Xi}_c^{+}\to {\Sigma}^0{\pi}^{+} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>Σ</mml:mi> <mml:mn>0</mml:mn> </mml:msup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> </mml:math> are observed for the first time. The ratios of branching fractions of $$ {\Xi}_c^{+}\to p{K}_S^0 $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:mi>p</mml:mi> <mml:msubsup> <mml:mi>K</mml:mi> <mml:mi>S</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math> , $$ {\Xi}_c^{+}\to \Lambda {\pi}^{+} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:mi>Λ</mml:mi> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> </mml:math> , and $$ {\Xi}_c^{+}\to {\Sigma}^0{\pi}^{+} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>Σ</mml:mi> <mml:mn>0</mml:mn> </mml:msup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> </mml:math> relative to that of $$ {\Xi}_c^{+}\to {\Xi}^{-}{\pi}^{+}{\pi}^{+} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>Ξ</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> </mml:math> are measured to be $$ {\displaystyle \begin{array}{c}\frac{\mathcal{B}\left({\Xi}_c^{+}\to p{K}_S^0\right)}{\mathcal{B}\left({\Xi}_c^{+}\to {\Xi}^{-}{\pi}^{+}{\pi}^{+}\right)}=\left(2.47\pm 0.16\pm 0.07\right)\%,\ {}\frac{\mathcal{B}\left({\Xi}_c^{+}\to \Lambda {\pi}^{+}\right)}{\mathcal{B}\left({\Xi}_c^{+}\to {\Xi}^{-}{\pi}^{+}{\pi}^{+}\right)}=\left(1.56\pm 0.14\pm 0.09\right)\%,\ {}\frac{\mathcal{B}\left({\Xi}_c^{+}\to {\Sigma}^0{\pi}^{+}\right)}{\mathcal{B}\left({\Xi}_c^{+}\to {\Xi}^{-}{\pi}^{+}{\pi}^{+}\right)}=\left(4.13\pm 0.26\pm 0.22\right)\%.\end{array}} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mtable> <mml:mtr> <mml:mtd> <mml:mfrac> <mml:mrow> <mml:mi>B</mml:mi> <mml:mfenced> <mml:mrow> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:mi>p</mml:mi> <mml:msubsup> <mml:mi>K</mml:mi> <mml:mi>S</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:mrow> </mml:mfenced> </mml:mrow> <mml:mrow> <mml:mi>B</mml:mi> <mml:mfenced> <mml:mrow> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>Ξ</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> </mml:mrow> </mml:mfenced> </mml:mrow> </mml:mfrac> <mml:mo>=</mml:mo> <mml:mfenced> <mml:mrow> <mml:mn>2.47</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.16</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.07</mml:mn> </mml:mrow> </mml:mfenced> <mml:mo>%</mml:mo> <mml:mo>,</mml:mo> </mml:mtd> </mml:mtr> <mml:mtr> <mml:mtd> <mml:mfrac> <mml:mrow> <mml:mi>B</mml:mi> <mml:mfenced>

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Journal
Journal of High Energy Physics
Published
2025-03-11
DOI
https://doi.org/10.1007/jhep03(2025)061
Citations
4
Primary Topic
Particle physics theoretical and experimental studies
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article
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article

Observations of the singly Cabibbo-suppressed decays $$ {\Xi}_c^{+}\to p{K}_S^0 $$, $$ {\Xi}_c^{+}\to \Lambda {\pi}^{+} $$, and $$ {\Xi}_c^{+}\to {\Sigma}^0{\pi}^{+} $$ at Belle and Belle II

K. Ravindran, E.-J. Jang, T. Lam, K. Kinoshita et al.
4 citations
Journal of High Energy Physics
Particle physics theoretical and experimental studies
7.48
article

Observations of the singly Cabibbo-suppressed decays $$ {\Xi}_c^{+}\to p{K}_S^0 $$, $$ {\Xi}_c^{+}\to \Lambda {\pi}^{+} $$, and $$ {\Xi}_c^{+}\to {\Sigma}^0{\pi}^{+} $$ at Belle and Belle II

K. Ravindran, E.-J. Jang, T. Lam, K. Kinoshita, H. Atmacan, C. Cecchi, T. E. Browder, P. Ecker, S. Pardi, Y. Onuki, G. Dujany, Z. Gruberová, S.-J. Cho, R. Leboucher, C. H. Kim, C. Z. Yuan, S. Pokharel, D. Ricalde Herrmann, M. Alhakami, S. Longo, J. S. Lange, M. Garcia-Hernandez, C. Schwanda, T. Iijima, G. Mancinelli, D. Epifanov, R. Volpe, J. Libby, S. Marcello, M. Maggiora, K. Kumara, W. Gradl, G. Gaudino, M. Kaleta, M. Neu, D. Marcantonio, Y.-J. Kwon, Y. B. Li, S. Patra, M. Watanabe, N. K. Baghel, H. Ghumaryan, Н. Акопов, S.-H. Park, Y. Nakazawa, M. E. Sevior, J. Kandra, A. Ishikawa, Shoichi Watanuki, Y. Jin, T. Higuchi, W. M. Song, E. Graziani, J. V. Bennett, H. Svidras, A. Sokolov, A. Soffer, S. Moneta, K. Chirapatpimol, C. Ketter, C. Harris, C. Lyu, J. X. Cui, S. A. De La Motte, M. Masuda, Y. Seino, P. Cheema, H. Miyake, A. Beaubien, R. Peschke, M. Röhrken, A. Natochii, U. Tamponi, S. Yamada, L. Aggarwal, Jürgen Becker, S. Bussino, A. Baur, T. Martinov, T. Kuhr, T. K. Pedlar, F. Keil, S. Mitra, M. Sobotzik, S. Korpar, R. Itoh, C. Praz, M. Mirra, C. Sfienti, P. Kodyš, J. Lin, Q. Y. Liu, A. Selce, H. Ono, F. Di Capua, J. Park, J. Borah, S. Kohani, A. Di Canto, K. Park, J. A. McKenna, T. Kunigo, A. Sibidanov, Y.-K. Kim, J. Baudot, S. Wallner, S. Sandilya, F. Simon, G. Karyan, A. Thaller, J. Cerasoli, R. Maiti, V. Bertacchi, D. Y. Kim, Y. Kulii, E. Solovieva, R. Mussa, D. Greenwald, R. Manfredi, G. De Pietro, R. Sobie, P. Branchini, M. Aversano, Q. Zhou, H. Junkerkalefeld, F. Le Diberder, M.-Z. Wang, V. Babu, T. Podobnik, V. Aushev, M. J. Lee, T. Lueck, M. Bessner, A. Korobov, D. Liventsev, A. B. Kaliyar, P. Gironella Gironell, M. Remnev, P. Goldenzweig, S. Ogawa, S.-K. Choi, A. Bobrov, M. Laurenza, S. Bettarini, D. Biswas, Z. Doležal, I. Adachi, Y. Yusa, D. A. Sanders, A. Rostomyan, G. Rizzo, P. Urquijo, D. Bodrov, T. Shimasaki, N. Anh Ky, T. Fillinger, S. Raiz, M. Bertemes, C. P. Shen, S. Nishida, K. Gudkova, A. E. Bolz, P. Leo, A. Aloisio, I. M. Peruzzi, D. M. Asner, G. Giakoustidis, J.-G. Shiu, S. Prell, R. Godang, Y. Li, M. Hoek, P. Feichtinger, K.-H. Kim, L. K. Li, H. Park, D. Dossett, M. Barrett, M. Campajola, A. Kuzmin, I. Ripp-Baudot, J. Dingfelder, R. Pestotnik, E. Won, R. de Sangro, K. Chilikin, W. B. Yan, G. De Nardo, S. Lacaprara, I. Tsaklidis, M. Nayak, R. Giordano, A. Martens, P. Stavroulakis, D. E. Jaffe, S. Dey, G. Ghevondyan, 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, S. Bahinipati, J. Serrano, R. A. Briere, C. Miller, X. P. Xu, G. Finocchiaro, M. Takizawa, M. Nayak, M. Sumihama, K. Uno, W. W. Jacobs, M. Iwasaki, Y.B Li, M. Naruki, C. Kiesling, Kiyoshi Tanida, P. Bambade, C. Mariñas, M. Dorigo, A. Budano, D. Matvienko, K. Senyo, M. Veronesi, A. Giri, R. Kowalewski, B. Yabsley, H. Hayashii, L. Corona, R. van Tonder, K. Lalwani, W. Shan, P. Krokovny, T. Humair, K. Unger, P. Horak, L. Šantelj, B. Spruck, A. Bondar, A. Johnson, H.-E. Cho, J. Yelton, I. Nakamura, A. Gabrielli, K. Cho, E. Prencipe, T. Kawasaki, M.-C. Chang, L. Vitale, R. Mussa, M. Hohmann, Q. Campagna, V. Zhilich, N. Althubiti, H. Purwar, O. Tittel, L. Reuter, J. S. Zhou, J. H. Yin, K. Dugic, V. S. Vismaya, F. Tenchini, J.-Y. Kim, N. Ipsita, L. Zani, 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, A. Gaz, I. Haide, A. Heidelbach, D. Meleshko, R. Kumar, I. Heredia-De La Cruz, F. Bianchi, B. Gobbo, Zhiqing Liu, F. Meier, E. Torassa, R. Cheaib, O. Gogota, M. Nakao, L. Massaccesi, E. Bertholet, L. Zhu, M. H. Liu, X. Shi, J. Skorupa, I. Domínguez Jiménez, D. Ghosh, Y. P. Liao, D. Jacobi, J. Yuan, L. E. Piilonen, K. Inami, M. Merola, G. Casarosa, A. Warburton, V. Gaur, T. Ferber, T. Aushev, C. Martellini, E. De La Cruz–Burelo, R. Žlebčík, M. Starič, C. Wessel, L. Lanceri, K. Yoshihara, T. S. Lau, S. Banerjee, J. U. Rehman, R. HOPPE, A. Bożek, K. Trabelsi, G. Schnell, N. Suwonjandee, G. Pakhlova, S. Vahsen, Y. Ushiroda, Z. Natkaniec, R. Stroili, J. M. Roney, P. Križan, M. Maushart, C. Madaan, Yue Ma
article en
4 citations

Abstract

A bstract Using data samples of 983.0 fb − 1 and 427.9 fb − 1 accumulated with the Belle and Belle II detectors operating at the KEKB and SuperKEKB asymmetric-energy e + e − colliders, singly Cabibbo-suppressed decays $$ {\Xi}_c^{+}\to p{K}_S^0 $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:mi>p</mml:mi> <mml:msubsup> <mml:mi>K</mml:mi> <mml:mi>S</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math> , $$ {\Xi}_c^{+}\to \Lambda {\pi}^{+} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:mi>Λ</mml:mi> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> </mml:math> , and $$ {\Xi}_c^{+}\to {\Sigma}^0{\pi}^{+} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>Σ</mml:mi> <mml:mn>0</mml:mn> </mml:msup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> </mml:math> are observed for the first time. The ratios of branching fractions of $$ {\Xi}_c^{+}\to p{K}_S^0 $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:mi>p</mml:mi> <mml:msubsup> <mml:mi>K</mml:mi> <mml:mi>S</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math> , $$ {\Xi}_c^{+}\to \Lambda {\pi}^{+} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:mi>Λ</mml:mi> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> </mml:math> , and $$ {\Xi}_c^{+}\to {\Sigma}^0{\pi}^{+} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>Σ</mml:mi> <mml:mn>0</mml:mn> </mml:msup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> </mml:math> relative to that of $$ {\Xi}_c^{+}\to {\Xi}^{-}{\pi}^{+}{\pi}^{+} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>Ξ</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> </mml:math> are measured to be $$ {\displaystyle \begin{array}{c}\frac{\mathcal{B}\left({\Xi}_c^{+}\to p{K}_S^0\right)}{\mathcal{B}\left({\Xi}_c^{+}\to {\Xi}^{-}{\pi}^{+}{\pi}^{+}\right)}=\left(2.47\pm 0.16\pm 0.07\right)\%,\ {}\frac{\mathcal{B}\left({\Xi}_c^{+}\to \Lambda {\pi}^{+}\right)}{\mathcal{B}\left({\Xi}_c^{+}\to {\Xi}^{-}{\pi}^{+}{\pi}^{+}\right)}=\left(1.56\pm 0.14\pm 0.09\right)\%,\ {}\frac{\mathcal{B}\left({\Xi}_c^{+}\to {\Sigma}^0{\pi}^{+}\right)}{\mathcal{B}\left({\Xi}_c^{+}\to {\Xi}^{-}{\pi}^{+}{\pi}^{+}\right)}=\left(4.13\pm 0.26\pm 0.22\right)\%.\end{array}} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mtable> <mml:mtr> <mml:mtd> <mml:mfrac> <mml:mrow> <mml:mi>B</mml:mi> <mml:mfenced> <mml:mrow> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:mi>p</mml:mi> <mml:msubsup> <mml:mi>K</mml:mi> <mml:mi>S</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:mrow> </mml:mfenced> </mml:mrow> <mml:mrow> <mml:mi>B</mml:mi> <mml:mfenced> <mml:mrow> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>Ξ</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> </mml:mrow> </mml:mfenced> </mml:mrow> </mml:mfrac> <mml:mo>=</mml:mo> <mml:mfenced> <mml:mrow> <mml:mn>2.47</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.16</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.07</mml:mn> </mml:mrow> </mml:mfenced> <mml:mo>%</mml:mo> <mml:mo>,</mml:mo> </mml:mtd> </mml:mtr> <mml:mtr> <mml:mtd> <mml:mfrac> <mml:mrow> <mml:mi>B</mml:mi> <mml:mfenced>

Journal of High Energy PhysicsVol. 2025(3)
Twitter (United States) (US), University of Hawaiʻi at Mānoa (US), University of Hawaii System (US), High Energy Accelerator Research Organization (JP), Korea Electric Power Corporation (South Korea) (KR), Centre de physique des particules de Marseille (FR), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (FR), The University of Osaka (JP)
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