Observation of anomalous Y(1S)pi(+)pi(-) and Y(2S)pi(+)pi(-) production near the Y(5S) resonance

  • Chen, K. -F.
  • Hou, W. -S.
  • Shapkin, M.
  • Sokolov, A.
  • Adachi, I.
  • ... Won, E.
  • 외 145명
Citations

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161
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208

초록

We report the first observation of e(+)e(-) -> Y(1S)pi(+)pi(-), Upsilon(2S)pi(+)pi(-), and first evidence for e(+)e(-) -> Y(3S)pi(+)pi(-), Y(1S)K+K-, near the peak of the Y(5S) resonance at root s similar to 10.87 GeV. The results are based on a data sample of 21.7 fb(-1) collected with the Belle detector at the KEKB e(+)e(-) collider. Attributing the signals to the Upsilon(5S) resonance, the partial widths Gamma(Y(5S) -> Y(1S)pi(+)pi(-)) = 0.59 +/- 0.04(stat)+/- 0.09(syst) MeV and Gamma(Y(5S) -> Y(2S)pi(+)pi(-)) = 0.85 +/- 0.07(stat)+/- 0.16(syst) MeV are obtained from the observed cross sections. These values exceed by more than 2 orders of magnitude the previously measured partial widths for dipion transitions between lower Y resonances.

키워드

HADRONIC TRANSITIONSDECAY
제목
Observation of anomalous Y(1S)pi(+)pi(-) and Y(2S)pi(+)pi(-) production near the Y(5S) resonance
저자
Chen, K. -F.Hou, W. -S.Shapkin, M.Sokolov, A.Adachi, I.Aihara, H.Arinstein, K.Aulchenko, V.Aushev, T.Bakich, A. M.Balagura, V.Bay, A.Belous, K.Bhardwaj, V.Bitenc, U.Bondar, A.Bozek, A.Bracko, M.Brodzicka, J.Browder, T. E.Chang, P.Chao, Y.Chen, A.Chen, W. T.Chistov, R.Choi, Y.Dalseno, J.Danilov, M.Dash, M.Drutskoy, A.Eidelman, S.Gabyshev, N.Golob, B.Ha, H.Haba, J.Hayasaka, K.Hayashii, H.Hazumi, M.Heffernan, D.Hoshi, Y.Hsiung, Y. B.Hyun, H. J.Iijima, T.Inami, K.Ishikawa, A.Ishino, H.Itoh, R.Iwasaki, M.Iwasaki, Y.Kah, D. H.Kang, J. H.Kapusta, P.Katayama, N.Kawai, H.Kawasaki, T.Kichimi, H.Kim, H. O.Kim, S. K.Kim, Y. J.Kinoshita, K.Korpar, S.Krizan, P.Krokovny, P.Kumar, R.Kuo, C. C.Kwon, Y. -J.Lange, J. S.Lee, J. S.Lee, M. J.Lesiak, T.Limosani, A.Lin, S. -W.Liu, Y.Liventsev, D.Mandl, F.McOnie, S.Medvedeva, T.Mitaroff, W.Miyabayashi, K.Miyake, H.Miyata, H.Miyazaki, Y.Mizuk, R.Moloney, G. R.Nakao, M.Natkaniec, Z.Nishida, S.Nitoh, O.Ogawa, S.Ohshima, T.Okuno, S.Olsen, S. L.Ostrowicz, W.Ozaki, H.Pakhlov, P.Pakhlova, G.Palka, H.Park, C. W.Park, H.Park, K. S.Pestotnik, R.Piilonen, L. E.Sakai, Y.Schneider, O.Schuemann, J.Schwanda, C.Schwartz, A. J.Senyo, K.Sevior, M. E.Shen, C. P.Shibuya, H.Shiu, J. -G.Shwartz, B.Somov, A.Stanic, S.Staric, M.Sumiyoshi, T.Takasaki, F.Tamai, K.Tanaka, M.Taylor, G. N.Teramoto, Y.Trabelsi, K.Uehara, S.Ueno, K.Uglov, T.Unno, Y.Uno, S.Urquijo, P.Ushiroda, Y.Usov, Y.Varner, G.Vervink, K.Villa, S.Wang, C. C.Wang, C. H.Wang, M. -Z.Wang, P.Wang, X. L.Watanabe, Y.Wedd, R.Wicht, J.Won, E.Yabsley, B. D.Yamashita, Y.Yamauchi, M.Yuan, C. Z.Yusa, Y.Zhang, C. C.Zhang, Z. P.Zupanc, A.
DOI
10.1103/PhysRevLett.100.112001
발행일
2008-03-21
유형
Article
저널명
Physical Review Letters
100
11