First Observation of the P-Wave Spin-Singlet Bottomonium States h(b)(1P) and h(b)(2P)

  • Adachi, I.
  • Aihara, H.
  • Arinstein, K.
  • Asner, D. M.
  • Aushev, T.
  • ... Cheon, Byung Gu
  • 외 150명
Citations

WEB OF SCIENCE

116
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157

초록

We report the first observations of the spin-singlet bottomonium states h(b)(1P) and h(b)(2P). The states are produced in the reaction e(+)e(-) --> h(b)(nP)pi(+)pi(-) using a 121.4 fb(-1) data sample collected at energies near the Y(5S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We determine M[h(b)(1P)] = (9898.2(-1.0-1.1)(+1.1+1.0)) MeV/c(2) and M[h(b)(2P)] = (10 259.8 +/- 0.6(-1.0)(+1.4)) MeV/c(2), which correspond to P-wave hyperfine splittings Delta M-HF = (+1.7 +/- 1.5) and (+0.5(-1.2)(+1.6)) MeV/c(2), respectively. The significances of the h(b)(1P) and h(b)(2P) are 5.5 sigma and 11.2 sigma, respectively. We find that the production of the h(b)(1P) and h(b)(2P) is not suppressed relative to the production of the Y(1S), Y(2S), and Y(3S).

제목
First Observation of the P-Wave Spin-Singlet Bottomonium States h(b)(1P) and h(b)(2P)
저자
Adachi, I.Aihara, H.Arinstein, K.Asner, D. M.Aushev, T.Aziz, T.Bakich, A. M.Barberio, E.Belous, K.Bhardwaj, V.Bhuyan, B.Bondar, A.Bracko, M.Brodzicka, J.Browder, T. E.Chang, P.Chen, A.Chen, P.Cheon, Byung GuChilikin, K.Chistov, R.Cho, I. -S.Cho, K.Choi, Y.Dalseno, J.Danilov, M.Drasal, Z.Drutskoy, A.Eidelman, S.Epifanov, D.Esen, S.Fast, J. E.Feindt, M.Gaur, V.Gabyshev, N.Garmash, A.Goh, Y. M.Golob, B.Hara, T.Hayasaka, K.Hayashii, H.Hoshi, Y.Hou, W. -S.Hsiung, Y. B.Hyun, H. J.Iijima, T.Ishikawa, A.Iwabuchi, M.Iwasaki, Y.Jaegle, I.Julius, T.Kang, J. H.Katayama, N.Kawasaki, T.Kichimi, H.Kim, H. O.Kim, J. B.Kim, K. T.Kim, M. J.Kim, Y. J.Kinoshita, K.Ko, B. R.Kobayashi, N.Koblitz, S.Korpar, S.Krizan, P.Kuhr, T.Kumita, T.Kuzmin, A.Kwon, Y-J.Lange, J. S.Lee, S. -H.Li, J.Libby, J.Liu, C.Liventsev, D.Louvot, R.MacNaughton, J.Matvienko, D.McOnie, S.Miyabayashi, K.Miyata, H.Miyazaki, Y.Mizuk, R.Mohanty, G. B.Mussa, R.Nagasaka, Y.Nakano, E.Nakao, M.Nakazawa, H.Natkaniec, Z.Neubauer, S.Nishida, S.Nishimura, K.Nitoh, O.Nozaki, T.Ohshima, T.Okuno, S.Olsen, S. L.Onuki, Y.Pakhlov, P.Pakhlova, G.Park, H.Pedlar, T. K.Pestotnik, R.Petric, M.Piilonen, L. E.Poluektov, A.Ritter, M.Roehrken, M.Ryu, S.Sahoo, H.Sakai, Y.Sanuki, T.Schneider, O.Schwanda, C.Schwartz, A. J.Senyo, K.Seon, O.Sevior, M. E.Shapkin, M.Shebalin, V.Shibata, T. -A.Shiu, J. -G.Shwartz, B.Simon, F.Smerkol, P.Sohn, Y. -S.Sokolov, A.Solovieva, E.Stanic, S.Staric, M.Sumihama, M.Tatishvili, G.Teramoto, Y.Tikhomirov, I.Trabelsi, K.Uchida, M.Uehara, S.Uglov, T.Unno, Y.Uno, S.Vahsen, S. E.Varner, G.Varvell, K. E.Vinokurova, A.Wang, C. H.Wang, X. L.Watanabe, Y.Wicht, J.Won, E.Yabsley, B. D.Yamashita, Y.Yuan, C. Z.Zhilich, V.Zupanc, A.
DOI
10.1103/PhysRevLett.108.032001
발행일
2012-01
유형
Article
저널명
Physical Review Letters
108
3
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