Observation of the Radiative Decays of ϒ(1S) to χ_{c1}.

Journal Article (Journal Article)

We report the first observation of the radiative decay of the ϒ(1S) into a charmonium state. The significance of the observed signal of ϒ(1S)→γχ_{c1} is 6.3 standard deviations including systematics. The branching fraction is calculated to be B[ϒ(1S)→γχ_{c1}]=[4.7_{-1.8}^{+2.4}(stat)_{-0.5}^{+0.4}(sys)×10^{-5}]. We also searched for ϒ(1S) radiative decays into χ_{c0,2} and η_{c}(1S,2S), and set upper limits on their branching fractions. These results are obtained from a 24.9  fb^{-1} data sample collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider at a center-of-mass energy equal to the ϒ(2S) mass using ϒ(1S) tagging by the ϒ(2S)→ϒ(1S)π^{+}π^{-} transitions.

Full Text

Duke Authors

Cited Authors

  • Katrenko, P; Adachi, I; Aihara, H; Al Said, S; Asner, DM; Aushev, T; Badhrees, I; Bahinipati, S; Behera, P; Beleño, C; Bennett, J; Bhardwaj, V; Bhuyan, B; Biswal, J; Bobrov, A; Bonvicini, G; Bračko, M; Campajola, M; Cao, L; Červenkov, D; Chekelian, V; Chen, A; Cheon, BG; Chilikin, K; Cho, HE; Cho, K; Choi, S-K; Choi, Y; Choudhury, S; Cinabro, D; Cunliffe, S; Di Capua, F; Di Carlo, S; Doležal, Z; Dong, TV; Eidelman, S; Epifanov, D; Fast, JE; Fulsom, BG; Garg, R; Gaur, V; Gabyshev, N; Garmash, A; Giri, A; Goldenzweig, P; Golob, B; Grzymkowska, O; Hartbrich, O; Hayasaka, K; Hayashii, H; Hou, W-S; Iijima, T; Inami, K; Ishikawa, A; Itoh, R; Iwasaki, M; Iwasaki, Y; Jacobs, WW; Jeon, HB; Jia, S; Jin, Y; Joffe, D; Joo, KK; Karyan, G; Kichimi, H; Kim, DY; Kim, KT; Kim, SH; Kinoshita, K; Kodyš, P; Korpar, S; Križan, P; Kroeger, R; Kuhr, T; Lee, IS; Lee, SC; Lewis, P; Li, YB; Li Gioi, L; Libby, J; Lieret, K; MacQueen, C; Masuda, M; Matsuda, T; Matvienko, D; Merola, M; Miyabayashi, K; Miyata, H; Mizuk, R; Mohanty, GB; Moon, TJ; Mori, T; Mussa, R; Nakano, E; Nakano, T; Nakao, M; Nayak, M; Nisar, NK; Nishida, S; Nishimura, K; Ono, H; Onuki, Y; Oskin, P; Pakhlov, P; Pakhlova, G; Pang, T; Pardi, S; Park, CW; Park, H; Park, S-H; Paul, S; Pedlar, TK; Pestotnik, R; Piilonen, LE; Popov, V; Prencipe, E; Prim, MT; Ritter, M; Rostomyan, A; Rout, N; Russo, G; Sahoo, D; Sakai, Y; Sandilya, S; Sanuki, T; Savinov, V; Schneider, O; Schnell, G; Schueler, J; Schwanda, C; Seino, Y; Senyo, K; Sevior, ME; Shen, CP; Shiu, J-G; Solovieva, E; Starič, M; Stottler, ZS; Sumiyoshi, T; Sutcliffe, W; Takizawa, M; Tamponi, U; Tanida, K; Tenchini, F; Trabelsi, K; Uchida, M; Uehara, S; Uglov, T; Unno, Y; Uno, S; Urquijo, P; Usov, Y; Van Tonder, R; Varner, G; Vossen, A; Wang, B; Wang, CH; Wang, M-Z; Wang, P; Wang, XL; Won, E; Yang, SB; Ye, H; Yelton, J; Yin, JH; Yuan, CZ; Yusa, Y; Zhang, ZP; Zhilich, V; Zhukova, V; Belle Collaboration,

Published Date

  • March 2020

Published In

Volume / Issue

  • 124 / 12

Start / End Page

  • 122001 -

PubMed ID

  • 32281835

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.124.122001

Language

  • eng