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

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. Li ; Libby, 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. ; Belle Collaboration

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.


Published in:
Physical Review D, 91, 11, 112007
Year:
2015
Publisher:
College Pk, Amer Physical Soc
ISSN:
1550-7998
Laboratories:




 Record created 2015-09-28, last modified 2018-12-03


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