| Literature DB >> 18517777 |
K-F Chen1, W-S Hou, M Shapkin, A Sokolov, I Adachi, H Aihara, K Arinstein, V Aulchenko, T Aushev, A M Bakich, V Balagura, A Bay, K Belous, V Bhardwaj, U Bitenc, A Bondar, A Bozek, M Bracko, J Brodzicka, T E Browder, P Chang, Y Chao, A Chen, W T Chen, R Chistov, Y Choi, J Dalseno, M Danilov, M Dash, A Drutskoy, S Eidelman, N Gabyshev, B Golob, H Ha, J Haba, K Hayasaka, H Hayashii, M Hazumi, D Heffernan, Y Hoshi, Y B Hsiung, H J Hyun, T Iijima, K Inami, A Ishikawa, H Ishino, R Itoh, M Iwasaki, Y Iwasaki, D H Kah, J H Kang, P Kapusta, N Katayama, H Kawai, T Kawasaki, H Kichimi, H O Kim, S K Kim, Y J Kim, K Kinoshita, S Korpar, P Krizan, P Krokovny, R Kumar, C C Kuo, Y-J Kwon, J S Lange, J S Lee, M J Lee, T Lesiak, A Limosani, S-W Lin, Y Liu, D Liventsev, F Mandl, S McOnie, T Medvedeva, W Mitaroff, K Miyabayashi, H Miyake, H Miyata, Y Miyazaki, R Mizuk, G R Moloney, M Nakao, Z Natkaniec, S Nishida, O Nitoh, S Ogawa, T Ohshima, S Okuno, S L Olsen, W Ostrowicz, H Ozaki, P Pakhlov, G Pakhlova, H Palka, C W Park, H Park, K S Park, R Pestotnik, L E Piilonen, Y Sakai, O Schneider, J Schümann, C Schwanda, A J Schwartz, K Senyo, M E Sevior, C P Shen, H Shibuya, J-G Shiu, B Shwartz, A Somov, S Stanic, M Staric, T Sumiyoshi, F Takasaki, K Tamai, M Tanaka, G N Taylor, Y Teramoto, K Trabelsi, S Uehara, K Ueno, T Uglov, Y Unno, S Uno, P Urquijo, Y Ushiroda, Y Usov, G Varner, K Vervink, S Villa, C C Wang, C H Wang, M-Z Wang, P Wang, X L Wang, Y Watanabe, R Wedd, J Wicht, E Won, B D Yabsley, Y Yamashita, M Yamauchi, C Z Yuan, Y Yusa, C C Zhang, Z P Zhang, A Zupanc.
Abstract
We report the first observation of e;{+}e;{-}-->Upsilon(1S)pi;{+}pi;{-}, Upsilon(2S)pi;{+}pi;{-}, and first evidence for e;{+}e;{-}-->Upsilon(3S)pi;{+}pi;{-}, Upsilon(1S)K+K-, near the peak of the Upsilon(5S) resonance at sqrt[s] approximately 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(Upsilon(5S)-->Upsilon(1S)pi;{+}pi;{-})=0.59+/-0.04(stat)+/-0.09(syst) MeV and Gamma(Upsilon(5S)-->Upsilon(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 Upsilon resonances.Entities:
Year: 2008 PMID： 18517777 DOI： 10.1103/PhysRevLett.100.112001
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161