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Measurement of e(+)e(-) -> pi(+)pi(-)psi(2S) via initial state radiation at Belle

Authors
Wang, X. L.Yuan, C. Z.Shen, C. P.Wang, P.Abdesselam, A.Adachi, I.Aihara, H.Al Said, S.Arinstein, K.Asner, D. M.Ayad, R.Bakich, A. M.Bansal, V.Bhuyan, B.Bobrov, A.Bonvicini, G.Bracko, M.Browder, T. E.Cervenkov, D.Chang, P.Chekelian, V.Chen, A.Cheon, B. G.Chilikin, K.Chistov, R.Cho, K.Chobanova, V.Choi, S. -K.Choi, Y.Cinabro, D.Dalseno, J.Danilov, M.Dolezal, Z.Drasal, Z.Drutskoy, A.Dutta, K.Eidelman, S.Farhat, H.Fast, J. E.Ferber, T.Gaur, V.Garmash, A.Getzkow, D.Gillard, R.Goh, Y. M.Haba, J.Hayasaka, K.Hayashii, H.He, X. H.Hou, W. -S.Iijima, T.Inami, K.Ishikawa, A.Itoh, R.Iwasaki, Y.Joffe, D.Julius, T.Kang, K. H.Kato, E.Kawasaki, T.Kiesling, C.Kim, D. Y.Kim, H. J.Kim, J. B.Kim, J. H.Kim, M. J.Kim, S. H.Kim, Y. J.Kinoshita, K.Ko, B. R.Kodys, P.Korpar, S.Krizan, P.Krokovny, P.Kuzmin, A.Kwon, Y. -J.Lange, J. S.Lee, I. S.Lewis, P.Li, Y.Gioi, L. LiLibby, J.Liventsev, D.Lukin, P.Matvienko, D.Miyabayashi, K.Miyata, H.Mizuk, R.Moll, A.Mori, T.Mussa, R.Nakano, E.Nakao, M.Nanut, T.Natkaniec, Z.Nisar, N. K.Nishida, S.Ogawa, S.Okuno, S.Olsen, S. L.Pakhlov, P.Pakhlova, G.Park, C. W.Park, H.Pedlar, T. K.Pestotnik, R.Petric, M.Piilonen, L. E.Ribezl, E.Ritter, M.Rostomyan, A.Ryu, S.Sakai, Y.Sandilya, S.Santelj, L.Sanuki, T.Savinov, V.Schneider, O.Schnell, G.Schwanda, C.Semmler, D.Senyo, K.Shebalin, V.Shibata, T. -A.Shiu, J. -G.Sibidanov, A.Simon, F.Sohn, Y. -S.Sokolov, A.Solovieva, E.Staric, M.Steder, M.Sumiyoshi, T.Tamponi, U.Tanida, K.Tatishvili, G.Teramoto, Y.Trabelsi, K.Uchida, M.Uglov, T.Unno, Y.Uno, S.Usov, Y.Van Hulse, C.Vanhoefer, P.Varner, G.Vinokurova, A.Wagner, M. N.Watanabe, Y.Won, E.Yashchenko, S.Yusa, Y.Zhang, Z. P.Zhilich, V.Zupanc, A.
Issue Date
12-6월-2015
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW D, v.91, no.11
Indexed
SCOPUS
Journal Title
PHYSICAL REVIEW D
Volume
91
Number
11
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/93267
DOI
10.1103/PhysRevD.91.112007
ISSN
2470-0010
Abstract
We report measurement of the cross section of e(+)e(-) -> pi(+)pi(-)psi(2S) between 4.0 and 5.5 GeV, based on an analysis of initial state radiation events in a 980 fb(-1) data sample recorded with the Belle detector. The properties of the Y(4360) and Y(4660) states are determined. Fitting the mass spectrum of pi(+)pi(-)psi(2S) with two coherent Breit-Wigner functions, we find two solutions with identical mass and width but different couplings to electron-positron pairs: M-Y(4360) = (4347 +/- 6 +/- 3) MeV/c(2), Gamma(Y(4360)) = (103 +/- 9 +/- 5) MeV, M-Y(4660) = (4652 +/- 10 +/- 8) MeV/c(2), Gamma(Y(4660)) = (68 +/- 11 +/- 1) MeV; and B[Y(4360) -> pi(+)pi(-)psi(2S)] . Gamma(e+e-)(Y(4360)) = (10.9 +/- 0.6 +/- 0.7) eV and B[Y(4660) -> pi(+)pi(-)psi(2S)] . Gamma(e+e-)(Y(4660)) = (8.1 +/- 1.1 +/- 0.5) eV for one solution; or B[Y(4360) -> pi(+)pi(-)psi(2S)] . Gamma(e+e-)(Y(4360)) = (9.2 +/- 0.6 +/- 0.6) eV and B[Y(4660) -> pi(+)pi(-)psi(2S)] . Gamma(e+e-)(Y(4660)) = (2.0 +/- 0.3 +/- 0.2) eV for the other. Here, the first errors are statistical and the second systematic. Evidence for a charged charmoniumlike structure at 4.05 GeV/c(2) is observed in the pi(+/-)psi(2S) intermediate state in the Y(4360) decays.
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