Observation of the radiative decay $D_s (2317)^+ \to D_s^* γ$

We observe the radiative decay $D^{*}_{s0}(2317)^{+} \to D_{s}^{*+} γ$ for the first time, with a significance exceeding $10$ standard deviations. The signal is found in the continuum $e^+ e^- \to c\bar{c}$ process with the combined data samples of 980.4~$\rm fb^{-1}$ and 427.9~$\rm fb^{-1}$ collected by the Belle and Belle~II detectors operating at the KEKB and SuperKEKB asymmetric-energy $e^+e^-$ colliders, respectively. The branching fraction ratio ${\cal B}(D^{*}_{s0}(2317)^{+} \to D_{s}^{*+} γ)/{\cal B}(D^{*}_{s0}(2317)^{+} \to D_{s}^{+} π^{0})$ is measured to be $[7.14 \pm 0.70({\rm stat.}) \pm 0.23({\rm syst.})]\%$. This result provides significant new experimental input for the determination of the quark structure of the $D^{*}_{s0}(2317)^{+}$, which remains unknown.

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Publication Details

Journal
ArXiv.org
Published
2025-01-01
DOI
https://doi.org/10.3204/pubdb-2025-05071
Primary Topic
Quantum Chromodynamics and Particle Interactions
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article
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article

Observation of the radiative decay $D_s (2317)^+ \to D_s^* γ$

K. Ravindran, H. Atmacan, C. Cecchi, T. E. Browder et al.
ArXiv.org
Quantum Chromodynamics and Particle Interactions
article

Observation of the radiative decay $D_s (2317)^+ \to D_s^* γ$

K. Ravindran, H. Atmacan, C. Cecchi, T. E. Browder, S. P. Maharana, A. Lozar, P. Ecker, X. Dong, G. Dujany, Z. Gruberová, L. K. Li, R. Leboucher, R. Garg, F. Otani, D. Ricalde Herrmann, Shinichi Ogawa, A. Panta, M. Alhakami, S. Uno, P. Chang, K. Uno, M. Garcia-Hernandez, C. Schwanda, T. Iijima, R. Volpe, J. Libby, S. -J. Cho, W. Gradl, G. Gaudino, E. Ganiev, R. Mizuk, D. Marcantonio, S. Patra, S. A. Al‐Ghamdi, K. Parham, N. K. Baghel, H. Ghumaryan, Н. Акопов, S. Paul, S. Pardi, E. -J. Jang, A. Ishikawa, G. Sharma, S. X. Li, S. Moneta, H. Ono, Dmitry Meleshko, M. Starič, K. Chirapatpimol, Anning Huang, J. L. Ma, H. Chetri, H. Aihara, Cheng‐Hsuan Lyu, J. X. Cui, S. A. De La Motte, M. Masuda, P. Cheema, L. Chen, H. Miyake, A. Beaubien, B. Shwartz, A. Natochii, B. Gobbo, V. Lisovskyi, L. Aggarwal, Jürgen Becker, S. Bussino, T. Martinov, T. Kuhr, T. K. Pedlar, M. Merola, F. Keil, T. Bilka, M. Sobotzik, K. Kumara, C. Praz, Ruchika Mehta, Malaya K. Nayak, M. Mirra, C. Sfienti, P. Kodyš, Y. Li, Q. Y. Liu, T. Higuchi, P. L. M. Podesta-Lerma, J. V. Bennett, J. Borah, S. Kohani, A. Di Canto, J. A. McKenna, T. Kunigo, J. Baudot, S. Wallner, SAMIRAN CHUTIA, Markus Reif, F. Simon, A. Glazov, A. Thaller, M. Campajola, S. Jia, Sagar Hazra, R. Maiti, Michael H. Bartl, V. Bertacchi, Z. Q. Liu, Jian‐Min Yuan, E. Solovieva, D. Greenwald, R. Manfredi, C. Wessel, R. Sobie, S. Longo, P. Branchini, Q. Zhou, V. Babu, T. Podobnik, Francesco Testa, M. J. Lee, T. Lueck, M. Bessner, K. -H. Kim, C. -L. Hsu, D. Liventsev, S. Choudhury, P. Gironella Gironell, P. Goldenzweig, M. Laurenza, S. Bettarini, Lan Zhu, D. Biswas, M. Piccolo, Z. Doležal, J. -G. Shiu, T. Lam, Y. Yusa, D. A. Sanders, A. Rostomyan, G. Rizzo, P. Urquijo, M. Maggiora, K. H. Kang, D. Bodrov, G. Karyan, A. Korobov, N. Anh Ky, T. Fillinger, S. Raiz, M. Bertemes, C. P. Shen, H. Ahmed, S. Nishida, K. Gudkova, S. S. Tang, P. Leo, D. M. Asner, A. Gaz, G. De Pietro, R. Godang, P. Feichtinger, Y. -J. Kwon, Masayuki Watanabe, M. Barrett, I. Ripp-Baudot, S. Schneider, R. de Sangro, K. R. Amos, H. Kindo, K. Chilikin, C. Hearty, S. Lacaprara, R. Giordano, A. Martens, P. Stavroulakis, G. Ghevondyan, T. V. Dong, I. Ueda, M. Destefanis, K. E. Varvell, A. Boschetti, D. Y. Kim, E. Kovalenko, M. Wakai, V. Vobbilisetti, S. -H. Park, K. Cho, T. Shillington, Y. Unno, Q. M. Li, S. Bahinipati, R. Tiwary, X. T. Hou, R. A. Briere, C. Miller, P. Rados, G. Finocchiaro, M. Sumihama, M. Iwasaki, Y.B Li, M. Naruki, K. Tanida, K. Schoenning, P. Bambade, C. Mariñas, M. Dorigo, A. Budano, D. Matvienko, R. Kowalewski, G. Mancinelli, B. Yabsley, H. Hayashii, J. S. Lange, L. Corona, S. Spataro, P. M. Lewis, B. Fulsom, P. Krokovny, Richárd Farkas, Y. Jin, T. Humair, K. Unger, P. Horak, Richard T. Hoppe, L. Šantelj, Sumit Saha, B. Spruck, A. Bondar, F. F. Trantou, A. Johnson, J. Yelton, Shun Watanuki, I. Nakamura, H. -G. Moser, J. Serrano, A. Gabrielli, Y. Ma, J. Lin, L. Vitale, A. Giri, Kentaro Kinoshita, M. Hohmann, Yi Liao, T. Aushev, Q. Campagna, G. Bonvicini, N. Althubiti, H. Purwar, A. Passeri, O. Tittel, L. Reuter, S. Dey, J. S. Zhou, F. Tenchini, F. U. Bernlochner, T. Nguyen Manh, M. -Z. Wang, N. Ipsita, M. Bračko, D. Shtol, Y. B. Li, L. Zani, V. S. Vismaya, A. A. Bobrov, A. Gellrich, B. Scavino, M. Mantovano, H. -E. Cho, W. Shan, F. Forti, S. Reiter, R. Ayad, H. -J. Li, V. Savinov, I. Haide, P. Ecker, K. Špenko, G. Heine, J. A. Colorado-Caicedo, S. Privalov, Jae-Young Kim, I. Heredia-De La Cruz, Junho Park, L. Kumar, F. Meier, E. Torassa, Y. L. Han, O. Gogota, L. Massaccesi, E. Bertholet, Hyung Mok Lee, X. Shi, J. Skorupa, J. Kandra, I. Domínguez Jiménez, S. Kang, D. Ghosh, C. Finck, Belle II Collaboration, D. Jacobi, M. Zeyrek, K. Yi, L. E. Piilonen, V. Gautam, J. H. Yin, G. Casarosa, M. T. Prim, A. Warburton, V. Gaur, T. Ferber, Q. P. Ji, C. Martellini, R. Nomaru, E. De La Cruz–Burelo, R. Žlebčík, K. Senyo, S. H. Robertson, G. B. Mohanty, C. Kiesling, S. Korpar, R. Itoh, E. Won, S. Prell, A. Kuzmin, M. Nakao, E. Graziani, W. W. Jacobs, I. Adachi, F. Bianchi, A. Soffer, G. De Nardo, W. B. Yan, M. T. Hedges, M. Hoek, T. Koga, A. Aloisio, E. Solovieva, R. van Tonder, Y. Seino, X. P. Xu, K. Yoshihara, T. S. Lau, C. Santos, R. Pestotnik, M. Veronesi, F. R. Le Diberder, B. G. Cheon, M. H. Liu, J. U. Rehman, A. Sibidanov, S.-K. Choi, Y. H. Ahn, A. Bożek, K. Trabelsi, G. Pakhlova, S. Vahsen, Y. Ushiroda, Z. Natkaniec, R. Stroili, J. M. Roney, P. Križan, M. Maushart, C. Li, Sw. Banerjee, C. Cheshta, C. Antonioli, I. Consigny, M. Abumusabh, L. Salutari, M. Marfoli
article en

Abstract

We observe the radiative decay $D^{*}_{s0}(2317)^{+} \to D_{s}^{*+} γ$ for the first time, with a significance exceeding $10$ standard deviations. The signal is found in the continuum $e^+ e^- \to c\bar{c}$ process with the combined data samples of 980.4~$\rm fb^{-1}$ and 427.9~$\rm fb^{-1}$ collected by the Belle and Belle~II detectors operating at the KEKB and SuperKEKB asymmetric-energy $e^+e^-$ colliders, respectively. The branching fraction ratio ${\cal B}(D^{*}_{s0}(2317)^{+} \to D_{s}^{*+} γ)/{\cal B}(D^{*}_{s0}(2317)^{+} \to D_{s}^{+} π^{0})$ is measured to be $[7.14 \pm 0.70({\rm stat.}) \pm 0.23({\rm syst.})]\%$. This result provides significant new experimental input for the determination of the quark structure of the $D^{*}_{s0}(2317)^{+}$, which remains unknown.

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