Evidence for the η<inf>b</inf>(2S) and observation of h <inf>b</inf>(1P)→η<inf>b</inf>(1S)γ and h<inf>b</inf>(2P) →η<inf>b</inf>(1S)γ

Date Issued
06-12-2012
Author(s)
Mizuk, R.
Asner, D. M.
Bondar, A.
Pedlar, T. K.
Adachi, I.
Aihara, H.
Arinstein, K.
Aulchenko, V.
Aushev, T.
Aziz, T.
Bakich, A. M.
Bay, A.
Belous, K.
Bhardwaj, V.
Bhuyan, B.
Bischofberger, M.
Bonvicini, G.
Bozek, A.
BraÄ ko, M.
Brodzicka, J.
Browder, T. E.
Chekelian, V.
Chen, A.
Chen, P.
Cheon, B. G.
Chilikin, K.
Chistov, R.
Cho, I. S.
Cho, K.
Choi, S. K.
Choi, Y.
Dalseno, J.
Danilov, M.
Doležal, Z.
Drásal, Z.
Drutskoy, A.
Eidelman, S.
Epifanov, D.
Fast, J. E.
Gaur, V.
Gabyshev, N.
Garmash, A.
Golob, B.
Haba, J.
Hara, T.
Hayasaka, K.
Hayashii, H.
Horii, Y.
Hoshi, Y.
Hou, W. S.
Hsiung, Y. B.
Hyun, H. J.
Iijima, T.
Ishikawa, A.
Itoh, R.
Iwabuchi, M.
Iwasaki, Y.
Iwashita, T.
Jaegle, I.
Julius, T.
Kang, J. H.
Kapusta, P.
Kawasaki, T.
Kim, H. J.
Kim, H. O.
Kim, J. H.
Kim, K. T.
Kim, M. J.
Kim, Y. J.
Kinoshita, K.
Ko, B. R.
Koblitz, S.
Kodyš, P.
Korpar, S.
Kouzes, R. T.
Križan, P.
Krokovny, P.
Kuhr, T.
Kumita, T.
Kuzmin, A.
Kwon, Y. J.
Lange, J. S.
Lee, S. H.
Li, J.
Indian Institute of Technology, Madras
Liu, C.
Liu, Y.
Liu, Z. Q.
Liventsev, D.
Louvot, R.
Matvienko, D.
McOnie, S.
Miyabayashi, K.
Miyata, H.
Mohanty, G. B.
Mohapatra, D.
Moll, A.
Muramatsu, N.
Mussa, R.
Nakao, M.
DOI
Abstract
We report the first evidence for the ηb(2S) using the h b(2P)→ηb(2S)γ transition and the first observation of the hb(1P)→ηb(1S)γ and hb(2P)→ηb(1S)γ transitions. The mass and width of the ηb(1S) and ηb(2S) are measured to be mηb (1S)=(9402.4±1.5±1.8) MeV/c2, m ηb (2S)=(9999.0±3.5-1.9+2.8) MeV/c2, and Γηb (1S)=(10.8-3.7-2.0+4.0+4.5) MeV. We also update the hb(1P) and hb(2P) mass measurements. We use a 133.4 fb-1 data sample collected at energies near the γ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e - collider. © 2012 American Physical Society.
Volume
109