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Yuan, C Z; Shen, C P; Wang, P; McOnie, S; Adachi, I; Aihara, H; Aulchenko, V; Bahinipati, S; Balagura, V; Barberio, E; Bitenc, U; Bondar, A; Bracko, M; Browder, T E; Chang, P; Chen, K-F; Chen, W T; Cheon, B G; Chistov, R; Cho, I-S; Choi, Y; Dash, M; Eidelman, S; Golob, B; Hayasaka, K; Heffernan, D; Hokuue, T; Hoshi, Y; Hyun, H J; Iijima, T; Ikado, K; Inami, K; Itoh, R; Kaji, H; Kang, J H; Katayama, N; Kawasaki, T; Kichimi, H; Kim, Y J; Kinoshita, K; Krizan, P; Kuo, C C; Kuzmin, A; Kwon, Y-J; Lee, S E; Lesiak, T; Lin, S-W; Liu, Y; Matyja, A; Medvedeva, T; Mitaroff, W; Miyabayashi, K; Miyake, H; Miyata, H; Miyazaki, Y; Mori, T; Nakao, M; Natkaniec, Z; Nishida, S; Nitoh, O; Okuno, S; Olsen, S L; Pakhlov, P; Pakhlova, G; Palka, H; Park, H; Park, K S; Peak, L S; Piilonen, L E; Schümann, J; Seidl, R; Senyo, K; Sevior, M E; Shapkin, M; Shiu, J-G; Shwartz, B; Singh, J B; Sokolov, A; Somov, A; Staric, M; Sumiyoshi, T; Takasaki, F; Tanaka, M; Taylor, G N; Tikhomirov, I; Uehara, S; Unno, Y; Usov, Y; Varner, G; Varvell, K E; Villa, S; Vinokurova, A; Wang, C C; Watanabe, Y; Won, E; Yabsley, B D; Yamashita, Y; Zhang, Z P; Zhilich, V; Zupanc, A
Physical review letters, 11/2007, Letnik: 99, Številka: 18Journal Article
The cross section for e(+)e(-)-->pi(+)pi(-)J/psi between 3.8 and 5.5 GeV/c(2) is measured using a 548 fb(-1) data sample collected on or near the Upsilon(4S) resonance with the Belle detector at KEKB. A peak near 4.25 GeV/c(2), corresponding to the so called Y(4260), is observed. In addition, there is another cluster of events at around 4.05 GeV/c(2). A fit using two interfering Breit-Wigner shapes describes the data better than one that uses only the Y(4260), especially for the lower-mass side of the 4.25 GeV enhancement.
