Details

Autor(en) / Beteiligte

• Adachi, I
• Aihara, H
• Arinstein, K
• Aushev, T
• Balagura, V
• Bozek, A
• Brodzicka, J
• Chen, A
• Chen, W T
• Chistov, R
• Dalseno, J
• Danilov, M
• Dash, M
• Drutskoy, A
• Eidelman, S
• Gabyshev, N
• Ha, H
• Haba, J
• Hayasaka, K
• Hayashii, H
• Hazumi, M
• Heffernan, D
• Iijima, T
• Inami, K
• Ishikawa, A
• Ishino, H
• Itoh, R
• Iwasaki, Y
• Kah, D H
• Kang, J H
• Kapusta, P
• Katayama, N
• Kawai, H
• Kawasaki, T
• Kichimi, H
• Kim, H O
• Kim, Y J
• Kinoshita, K
• Krizan, P
• Kuo, C C
• Lange, J S
• Lee, J S
• Lesiak, T
• Lin, S-W
• Liu, Y
• Liventsev, D
• Mandl, F
• Medvedeva, T
• Mitaroff, W
• Miyabayashi, K
• Miyazaki, Y
• Mizuk, R
• Moloney, G R
• Nakao, M
• Natkaniec, Z
• Nishida, S
• Nitoh, O
• Okuno, S
• Olsen, S L
• Ostrowicz, W
• Ozaki, H
• Pakhlova, G
• Palka, H
• Park, C W
• Park, H
• Park, K S
• Pestotnik, R
• Schneider, O
• Schümann, J
• Schwartz, A J
• Shen, C P
• Shibuya, H
• Shiu, J-G
• Shwartz, B
• Stanic, S
• Sumiyoshi, T
• Takasaki, F
• Tamai, K
• Tanaka, M
• Taylor, G N
• Teramoto, Y
• Trabelsi, K
• Uehara, S
• Ueno, K
• Uglov, T
• Unno, Y
• Ushiroda, Y
• Usov, Y
• Villa, S
• Wang, C C
• Wang, C H
• Wang, M-Z
• Wang, P
• Wang, X L
• Won, E
• Yabsley, B D
• Yamashita, Y
• Yamauchi, M
• Yusa, Y
• Zhang, Z P

Titel

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

Ist Teil von

• Physical review letters, 2008-03, Vol.100 (11), p.112001-112001, Article 112001

Ort / Verlag

United States

Erscheinungsjahr

2008

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• 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.