First Observation of the Hadronic Transitionϒ(4S)→ηhb(1P)and New Measurement of thehb(1P)andηb(1S)Parameters Academic Article uri icon

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abstract

  • Using a sample of 771.6×10(6) ϒϒ(4S) decays collected by the Belle experiment at the KEKB e(+)e(-) collider, we observe, for the first time, the transition ϒ(4S)→ηh(b)(1P) with the branching fraction B[ϒ(4S)→ηh(b)(1P)]=(2.18±0.11±0.18)×10(-3) and we measure the h(b)(1P) mass M(h(b)(1P))=(9899.3±0.4±1.0)  MeV/c(2), corresponding to the hyperfine (HF) splitting ΔM(HF)(1P)=(0.6±0.4±1.0)  MeV/c(2). Using the transition h(b)(1P)→γη(b)(1S), we measure the η(b)(1S) mass M(η(b)(1S))=(9400.7±1.7±1.6)  MeV/c(2), corresponding to ΔM(HF)(1S)=(59.6±1.7±1.6)  MeV/c(2), the η(b)(1S) width Γ(η(b)(1S))=(8(-5)(+6)±5)  MeV/c(2) and the branching fraction B[h(b)(1P)→γη(b)(1S)]=(56±8±4)%.

authors

  • Tamponi, U
  • Mussa, R
  • Abdesselam, A
  • Aihara, H
  • Arinstein, K
  • Asner, DM
  • Atmacan, H
  • Aushev, T
  • Ayad, R
  • Badhrees, I
  • Bakich, AM
  • Barberio, E
  • Bhardwaj, V
  • Bhuyan, B
  • Biswal, J
  • Bondar, A
  • Bonvicini, G
  • Bozek, A
  • Bračko, M
  • Browder, TE
  • Červenkov, D
  • Chen, Alan
  • Cheon, BG
  • Cho, K
  • Chobanova, V
  • Choi, S-K
  • Choi, Y
  • Cinabro, D
  • Danilov, M
  • Doležal, Z
  • Drásal, Z
  • Drutskoy, A
  • Eidelman, S
  • Epifanov, D
  • Farhat, H
  • Fast, JE
  • Ferber, T
  • Fulsom, BG
  • Gaur, V
  • Gabyshev, N
  • Garmash, A
  • Getzkow, D
  • Gillard, R
  • Goh, YM
  • Golob, B
  • Haba, J
  • Hayasaka, K
  • Hayashii, H
  • He, XH
  • Hedges, MT
  • Hou, W-S
  • Iijima, T
  • Inami, K
  • Ishikawa, A
  • Jaegle, I
  • Joffe, D
  • Julius, T
  • Kato, E
  • Katrenko, P
  • Kichimi, H
  • Kiesling, C
  • Kim, DY
  • Kim, HJ
  • Kim, JH
  • Kim, KT
  • Kim, SH
  • Kinoshita, K
  • Kodyš, P
  • Korpar, S
  • Križan, P
  • Krokovny, P
  • Kumita, T
  • Kuzmin, A
  • Lange, JS
  • Lewis, P
  • Libby, J
  • Lukin, P
  • Matvienko, D
  • Miyabayashi, K
  • Miyata, H
  • Mizuk, R
  • Mohanty, GB
  • Moll, A
  • Mori, T
  • Nakano, E
  • Nakao, M
  • Nanut, T
  • Natkaniec, Z
  • Nayak, M
  • Nisar, NK
  • Nishida, S
  • Ogawa, S
  • Okuno, S
  • Olsen, SL
  • Ostrowicz, W
  • Oswald, C
  • Pakhlova, G
  • Pal, B
  • Park, H
  • Pedlar, TK
  • Pesántez, L
  • Pestotnik, R
  • Petrič, M
  • Piilonen, LE
  • Ribežl, E
  • Ritter, M
  • Rostomyan, A
  • Ryu, S
  • Sakai, Y
  • Sandilya, S
  • Santelj, L
  • Sanuki, T
  • Sato, Y
  • Savinov, V
  • Schneider, O
  • Schnell, G
  • Schwanda, C
  • Semmler, D
  • Senyo, K
  • Sevior, ME
  • Shapkin, M
  • Shebalin, V
  • Shen, CP
  • Shibata, T-A
  • Shiu, J-G
  • Shwartz, B
  • Sibidanov, A
  • Simon, F
  • Sohn, Y-S
  • Sokolov, A
  • Starič, M
  • Steder, M
  • Stypula, J
  • Tanida, K
  • Teramoto, Y
  • Trabelsi, K
  • Uchida, M
  • Uglov, T
  • Unno, Y
  • Uno, S
  • Urquijo, P
  • Van Hulse, C
  • Vanhoefer, P
  • Varner, G
  • Vinokurova, A
  • Vossen, A
  • Wagner, MN
  • Wang, M-Z
  • Wang, XL
  • Watanabe, Y
  • Williams, KM
  • Won, E
  • Yamaoka, J
  • Yashchenko, S
  • Zhang, ZP
  • Zhilich, V
  • Zhulanov, V
  • Zupanc, A

publication date

  • October 2, 2015