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, Leo 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