Study of η and dipion transitions in ϒ(4S) decays to lower bottomonia

Published

Journal Article

© 2017 American Physical Society. We study hadronic transitions between bottomonium states using 496 fb-1 data collected at the ?(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e-collider. We measure B(?(4S)→π+π(1S))=(8.2±0.5(stat)±0.4(syst))×10-5, B(?(4S)→π+π(2S))=(7.9±1.0(stat)±0.4(syst))×10-5, and B(?(4S)→η?(1S))=(1.70±0.23(stat)±0.08(syst))×10-4. We measure the ratio of branching fractions R=B(?(4S)→η?(1S))/B(?(4S)→π+π(1S))=2.07±0.30(stat)±0.11(syst). We search for the decay ?(1D31,2)→η?(1S), but do not find significant evidence for such a transition. We also measure the initial-state radiation production cross sections of the ?(2S,3S) resonances and we find values compatible with the expected ones. Finally, the analysis of the ?(4S)→π+π(1S) events shows indications for a resonant contribution due to the f0(980) meson.

Full Text

Duke Authors

Cited Authors

  • Guido, E; Mussa, R; Tamponi, U; Adachi, I; Aihara, H; Al Said, S; Asner, DM; Aulchenko, V; Aushev, T; Ayad, R; Badhrees, I; Bakich, AM; Bansal, V; Behera, P; Bhardwaj, V; Bhuyan, B; Biswal, J; Bobrov, A; Bondar, A; Bozek, A; Bračko, M; Browder, TE; Červenkov, D; Chekelian, V; Chen, A; Cheon, BG; Chilikin, K; Cho, K; Choi, SK; Choi, Y; Cinabro, D; Dash, N; Di Carlo, S; DoleŽal, Z; Drásal, Z; Eidelman, S; Epifanov, D; Farhat, H; Fast, JE; Ferber, T; Fulsom, BG; Gaur, V; Gabyshev, N; Garmash, A; Gelb, M; Gillard, R; Goldenzweig, P; Haba, J; Hara, T; Hayasaka, K; Hayashii, H; Hedges, MT; Hou, WS; Iijima, T; Inami, K; Inguglia, G; Ishikawa, A; Itoh, R; Iwasaki, Y; Jacobs, WW; Jaegle, I; Jeon, HB; Jia, S; Jin, Y; Joffe, D; Joo, KK; Julius, T; Kang, KH; Karyan, G; Kawasaki, T; Kim, DY; Kim, JB; Kim, KT; Kim, MJ; Kim, SH; Kim, YJ; Kinoshita, K; Kodyš, P; Korpar, S; Kotchetkov, D; KriŽan, P; Krokovny, P; Kulasiri, R; Kumita, T; Kuzmin, A; Kwon, YJ; Lange, JS; Lewis, P; Li, CH; Li, L; Li Gioi, L; Libby, J; Liventsev, D; Lubej, M; Luo, T; Masuda, M; Matsuda, T; Matvienko, D; Merola, M; Miyabayashi, K

Published Date

  • September 1, 2017

Published In

Volume / Issue

  • 96 / 5

Electronic International Standard Serial Number (EISSN)

  • 2470-0029

International Standard Serial Number (ISSN)

  • 2470-0010

Digital Object Identifier (DOI)

  • 10.1103/PhysRevD.96.052005

Citation Source

  • Scopus