Study of Electromagnetic Decays of Orbitally Excited $Ξ_c$ Baryons
Creators: name: Belle Collaboration
name: Yelton, J.
name: Adachi, I.
name: Ahn, J. K.
name: Aihara, H.
name: AlSaid, S.
name: Asner, D. M.
name: Aushev, T.
name: Ayad, R.
name: Babu, V.
name: pati, S. Bahini
name: Behera, P.
name: Bele, C.
name: Bennett, J.
name: Bhardwaj, V.
name: Bhuyan, B.
name: Bilka, T.
name: Biswal, J.
name: Bonvicini, G.
name: Bozek, A.
name: Bracko, M.
name: Browder, T. E.
name: Campajola, M.
name: Cervenkov, D.
name: Chang, M. -C.
name: Chang, P.
name: Chekelian, V.
name: Chen, A.
name: Cheon, B. G.
name: Chilikin, K.
name: Cho, K.
name: Cho, S. -J.
name: Choi, S. - K.
name: Choi, Y.
name: Choudhury, S.
name: Cinabro, D.
name: Cunliffe, S.
name: DeNardo, G.
name: DiCapua, F.
name: Dolezal, Z.
name: Dong, T. V.
name: Eidelman, S.
name: Epifanov, D.
name: Ferber, T.
name: Fulsom, B. G.
name: Garg, R.
name: Gaur, V.
name: Gabyshev, N.
name: Garmash, A.
name: Giri, A.
name: Goldenzweig, P.
name: Hadjivasiliou, C.
name: Hartbrich, O.
name: Hayasaka, K.
name: Hayashii, H.
name: Hedges, M. T.
name: HernandezVillanueva, M.
name: Hou, W. -S.
name: Hsu, C. -L.
name: Iijima, T.
name: Inami, K.
name: Inguglia, G.
name: Ishikawa, A.
name: Itoh, R.
name: Iwasaki, M.
name: Iwasaki, Y.
name: Jacobs, W. W.
name: Jia, S.
name: Jin, Y.
name: Joo, C. W.
name: Joo, K. K.
name: Kaliyar, A. B.
name: Kang, K. H.
name: Karyan, G.
name: Kato, Y.
name: Kawasaki, T.
name: Kichimi, H.
name: Kiesling, C.
name: Kim, B. H.
name: Kim, D. Y.
name: Kim, S. H.
name: Kim, Y. -K.
name: Kinoshita, K.
name: Kodys, P.
name: Korpar, S.
name: Kotchetkov, D.
name: Krizan, P.
name: Kroeger, R.
name: Krokovny, P.
name: Kulasiri, R.
name: Kumar, R.
name: Kumara, K.
name: Kuzmin, A.
name: Kwon, Y. -J.
name: Lalwani, K.
name: Lange, J. S.
name: Lee, S . C.
name: Lewis, P.
name: Li, L. K.
name: Li, Y. B.
name: LiGioi, L.
name: Libby, J.
name: Lieret, K.
name: Liptak, Z.
name: Liventsev, D.
name: Luo, T.
name: MacQueen, C.
name: Masuda, M.
name: Matsuda, T.
name: Matvienko, D.
name: McNeil, J. T.
name: Merola, M.
name: Miyata, H.
name: Mizuk, R.
name: Mohanty, G. B.
name: Mohanty, S.
name: Moon, T. J.
name: Mori, T.
name: Mrvar, M.
name: Mussa, R.
name: Nakano, E.
name: Nakao, M.
name: Natkaniec, Z.
name: Natochii, A.
name: Nayak, M.
name: Nisar, N. K.
name: Nishida, S.
name: Ogawa, K.
name: Ogawa, S.
name: Ono, H.
name: Onuki, Y.
name: Oskin, P.
name: Pakhlov, P.
name: Pakhlova, G.
name: Pardi, S.
name: Park, H.
name: Park, S. -H.
name: Patra, S.
name: Paul, S.
name: Pedlar, T. K.
name: Pestotnik, R.
name: Piilonen, L. E.
name: Podobnik, T.
name: Popov, V.
name: Prencipe, E.
name: Prim, M. T.
name: Ritter, M.
name: Rostomyan, A.
name: Rout, N.
name: Russo, G.
name: Sahoo, D.
name: Sakai, Y.
name: Sandilya, S.
name: Santelj, L.
name: Sanuki, T.
name: Savinov, V.
name: Schnell, G.
name: Schueler, J.
name: Schwanda, C.
name: Seino, Y.
name: Sevior, K. Senyo M. E.
name: Shapkin, M.
name: Shebalin, V.
name: Shen, C. P.
name: Shiu, J. -G.
name: Shwartz, B.
name: Singh, J. B.
name: Sokolov, A.
name: Solovieva, E.
name: Staric, M.
name: Stottler, Z. S.
name: Strube, J. F.
name: Sumihama, M.
name: Sumisawa, K.
name: Sumiyoshi, T.
name: Sutcliffe, W.
name: Takizawa, M.
name: Tamponi, U.
name: Tanida, K.
name: Tenchini, F.
name: Uchida, M.
name: Uglov, T.
name: Unno, Y.
name: Uno, S.
name: Urquijo, P.
name: Usov, Y.
name: Vahsen, S. E.
name: VanTonder, R.
name: Varner, G.
name: Vinokurova, A.
name: Vorobyev, V.
name: Waheed, E.
name: Wang, C. H.
name: Wang, E.
name: Wang, M. -Z.
name: Wang, P.
name: Wang, X. L.
name: Watanabe, M.
name: Won, E.
name: Xu, X.
name: Yabsley, B. D.
name: Yan, W.
name: Yang, S. B.
name: Ye, H.
name: Yin, J. H.
name: Zhang, Z. P.
name: Zhilich, V.
name: Zhukova, V.
name: Zhulanov, V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: Using 980 $fb^-1$ of data collected with the Belle detector operating at the KEKB asymmetric-energy e^+e^- collider, we report a study of the electromagnetic decays of excited {charmed baryons} $Ξ_c(2790)$ and $Ξ_c(2815)$. A clear signal (8.6 standard deviations) is observed for $Ξ_c(2815)^0 \to Ξ_c^0γ$, and we measure: $B[Ξ_c(2815)^0 \to Ξ_c^0γ]/B[Ξ_c(2815)^0 \to Ξ_c(2645)^+π^- \to Ξ_c^0π^+π^-] = 0.41 \pm 0.05 \pm 0.03$. We also present evidence (3.8 standard deviations) for the similar decay of the $Ξ_c(2790)^0$ and measure: $B[Ξ_c(2790)^{0}\toΞ_c^{0}γ]/B[Ξ_c(2790)^0\toΞ_c^{\prime +}π^{-}\toΞ_c^{+}γπ^-] = 0.13 \pm 0.03 \pm 0.02$. The first quoted uncertainties are statistical and the second systematic. We find no hint of the analogous decays of the $Ξ_c(2815)^+$ and $Ξ_c(2790)^+$ baryons and set upper limits at the 90% confidence level of: $B[Ξ_c(2815)^{+}\toΞ_c^{+}γ]/B[Ξ_c(2815)^+\toΞ_c(2645)^0π^+\toΞ_c^+π^-π^+] &lt; 0.09,$ and $B[Ξ_c(2790)^{+}\toΞ_c^{+}γ]/B[Ξ_c(2790)^+\toΞ_c^{\prime 0}π^{+}\toΞ_c^{0}γπ^+] &lt; 0.06.$ Approximate values of the partial widths of the decays are extracted, which can be used to discriminate between models of the underlying quark structure of these excited states.
description: Submitted to Phys. Rev. D (Rapid Communications)