Li, Y.Shen, C. P.Adachi, I.Aihara, H.Asner, D. M.Aulchenko, V.Aushev, T.Babu, V.Behera, P.Belous, K.Bennett, J.Bessner, M.Bhardwaj, V.Bhuyan, B.Bilka, T.Bobrov, A.Bodrov, D.Bonvicini, G.Borah, J.Bozek, A.Bracko, M.Branchini, P.Browder, T. E.Budano, A.Campajola, M.Cervenkov, D.Chang, M. -C.Chang, P.Cheon, B. G.Chilikin, K.Cho, H. E.Cho, K.Cho, S. -J.Choi, S. -K.Choi, Y.Choudhury, S.Cinabro, D.Das, S.Dash, N.De Pietro, G.Dhamija, R.Di Capua, F.Dingfelder, J.Dolezal, Z.Dong, T. V.Dossett, D.Epifanov, D.Ferlewicz, D.Fulsom, B. G.Garg, R.Gaur, V.Garmash, A.Giri, A.Goldenzweig, P.Graziani, E.Gu, T.Gudkova, K.Hadjivasiliou, C.Hayasaka, K.Hayashii, H.Hou, W. -S.Hsu, C. -L.Iijima, T.Inami, K.Ipsita, N.Ishikawa, A.Itoh, R.Iwasaki, M.Jacobs, W. W.Jang, E. -J.Ji, Q. P.Jia, S.Jin, Y.Joo, K. K.Kang, K. H.Kiesling, C.Kim, C. H.Kim, D. Y.Kim, K. -H.Kim, Y. -K.Kinoshita, K.Korobov, A.Korpar, S.Kovalenko, E.Krizan, P.Krokovny, P.Kumar, M.Kumar, R.Kumara, K.Kwon, Y. -J.Lam, T.Lange, J. S.Laurenza, M.Lee, S. C.Li, C. H.Li, J.Li, L. K.Li, Y. B.Li Gioi, L.Lieret, K.Libby, J.Liventsev, D.Masuda, M.Matsuda, T.Matvienko, D.Maurya, S. K.Meier, F.Merola, M.Metzner, F.Miyabayashi, K.Mizuk, R.Mrvar, M.Nakamura, I.Nakao, M.Natkaniec, Z.Natochii, A.Nayak, L.Nayak, M.Nisar, N. K.Nishida, S.Ogawa, S.Ono, H.Oskin, P.Pakhlov, P.Pakhlova, G.Pardi, S.Park, H.Park, S. -H.Patra, S.Paul, S.Pedlar, T. K.Pestotnik, R.Piilonen, L. E.Podobnik, T.Prencipe, E.Prim, M. T.Rout, N.Russo, G.Sandilya, S.Sangal, A.Santelj, L.Savinov, V.Schnell, G.Schueler, J.Schwanda, C.Seino, Y.Senyo, K.Sevior, M. E.Shapkin, M.Sharma, C.Shiu, J. G.Singh, J. B.Solovieva, E.Staric, M.Stottler, Z. S.Sumihama, M.Sumiyoshi, T.Takizawa, M.Tamponi, U.Tanida, K.Tenchini, F.Trabelsi, K.Tsuboyama, T.Uchida, M.Unno, Y.Uno, S.van Tonder, R.Varner, G.Varvell, K. E.Vinokurova, A.Waheed, E.Wang, E.Wang, M. -Z.Watanabe, M.Watanuki, S.Werbycka, O.Won, E.Yabsley, B. D.Yan, W.Yang, S. B.Yelton, J.Yin, J. H.Yuan, C. Z.Yusa, Y.Zhai, Y.Zhang, Z. P.Zhilich, V.Zhukova, V.2024-01-222024-01-222023-02-072470-0010https://hdl.handle.net/10919/117466We present the first search for the weak radiative decays Λc+→ς+γ and Ξc0→Ξ0γ using a data sample of 980 fb-1 collected by the Belle detector operating at the KEKB asymmetric-energy e+e- collider. There are no evident Λc+→ς+γ or Ξc0→Ξ0γ signals. Taking the decays Λc+→pK-π+ and Ξc0→Ξ-π+ as normalization channels, the upper limits at 90% credibility level on the ratios of branching fractions B(Λc+→ς+γ)/B(Λc+→pK-π+)<4.0×10-3 and B(Ξc0→Ξ0γ)/B(Ξc0→Ξ-π+)<1.2×10-2 are determined. We obtain the upper limits at 90% credibility level on the absolute branching fractions B(Λc+→ς+γ)<2.6×10-4 and B(Ξc0→Ξ0γ)<1.8×10-4.11 page(s)application/pdfenIn CopyrightArticle - Refereedhttps://doi.org/10.1103/PhysRevD.107.0320011073Piilonen, Leo [0000-0001-6836-0748]2470-0029