Measurement of e+e- →π+π-ψ (2S) via initial state radiation at Belle

X. L. Wang; C. Z. Yuan; C. P. Shen; P. Wang; A. Abdesselam; I. Adachi; H. Aihara; S. Al Said; K. Arinstein; D. M. Asner; R. Ayad; A. M. Bakich; V. Bansal; B. Bhuyan; A. Bobrov; G. Bonvicini; M. Bračko; T. E. Browder; D. Červenkov; P. Chang; V. Chekelian; A. Chen; B. G. Cheon; K. Chilikin; R. Chistov; K. Cho; V. Chobanova; S. K. Choi; Y. Choi; D. Cinabro; J. Dalseno; M. Danilov; Z. DoleŽal; Z. Drásal; A. Drutskoy; K. Dutta; S. Eidelman; H. Farhat; J. E. Fast; T. Ferber; V. Gaur; A. Garmash; D. Getzkow; R. Gillard; Y. M. Goh; J. Haba; K. Hayasaka; H. Hayashii; X. H. He; W. S. Hou; T. Iijima; K. Inami; A. Ishikawa; R. Itoh; Y. Iwasaki; D. Joffe; T. Julius; K. H. Kang; E. Kato; T. Kawasaki; C. Kiesling; D. Y. Kim; H. J. Kim; J. B. Kim; J. H. Kim; M. J. Kim; S. H. Kim; Y. J. Kim; K. Kinoshita; B. R. Ko; P. Kodyš; S. Korpar; P. KriŽan; P. Krokovny; A. Kuzmin; Y. J. Kwon; J. S. Lange; I. S. Lee; P. Lewis; Y. Li; L. Li Gioi; J. Libby; D. Liventsev; P. Lukin; D. Matvienko; K. Miyabayashi; H. Miyata; R. Mizuk; A. Moll; T. Mori; R. Mussa; E. Nakano; M. Nakao; T. Nanut; Z. Natkaniec; N. K. Nisar; S. Nishida; S. Ogawa; S. Okuno; S. L. Olsen; P. Pakhlov; G. Pakhlova; C. W. Park; H. Park; T. K. Pedlar; R. Pestotnik; M. Petrič; L. E. Piilonen; E. RibeŽl; M. Ritter; A. Rostomyan; S. Ryu; Y. Sakai; S. Sandilya; L. Santelj; T. Sanuki; V. Savinov; O. Schneider; G. Schnell; C. Schwanda; D. Semmler; K. Senyo; V. Shebalin; T. A. Shibata; J. G. Shiu; A. Sibidanov; F. Simon; Y. S. Sohn; A. Sokolov; E. Solovieva; M. Starič; M. Steder; T. Sumiyoshi; U. Tamponi; K. Tanida; G. Tatishvili; Y. Teramoto; K. Trabelsi; M. Uchida; T. Uglov; Y. Unno; S. Uno; Y. Usov; C. Van Hulse; P. Vanhoefer; G. Varner; A. Vinokurova; M. N. Wagner; Y. Watanabe; E. Won; S. Yashchenko; Y. Yusa; Z. P. Zhang; V. Zhilich; A. Zupanc

doi:10.1103/PhysRevD.91.112007

Measurement of e+e- →π+π-ψ (2S) via initial state radiation at Belle

X. L. Wang
, C. Z. Yuan
, C. P. Shen
, P. Wang
, A. Abdesselam
, I. Adachi
, H. Aihara
, S. Al Said
, K. Arinstein
, D. M. Asner
, R. Ayad
, A. M. Bakich
, V. Bansal
, B. Bhuyan
, A. Bobrov
, G. Bonvicini
, M. Bračko
, T. E. Browder
, D. Červenkov
, P. Chang

V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. DoleŽal, Z. Drásal, A. Drutskoy, K. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, A. Garmash, D. Getzkow, R. Gillard, Y. M. Goh, J. Haba, K. Hayasaka, H. Hayashii, X. H. He, W. S. Hou, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, D. Joffe, T. Julius, K. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodyš, S. Korpar, P. KriŽan, P. Krokovny, A. Kuzmin, Y. J. Kwon, J. S. Lange, I. S. Lee, P. Lewis, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, A. Moll, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, T. K. Pedlar, R. Pestotnik, M. Petrič, L. E. Piilonen, E. RibeŽl, M. Ritter, A. Rostomyan, S. Ryu, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, K. Senyo, V. Shebalin, T. A. Shibata, J. G. Shiu, A. Sibidanov, F. Simon, Y. S. Sohn, A. Sokolov, E. Solovieva, M. Starič, M. Steder, T. Sumiyoshi, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, M. N. Wagner, Y. Watanabe, E. Won, S. Yashchenko, Y. Yusa, Z. P. Zhang, V. Zhilich, A. Zupanc

Virginia Polytechnic Institute and State University
CAS - Institute of High Energy Physics
Beihang University
University of Tabuk
The Graduate University for Advanced Studies
High Energy Accelerator Research Organization, Tsukuba
The University of Tokyo
King Abdulaziz University
Novosibirsk State University
Pacific Northwest National Laboratory
The University of Sydney
Indian Institute of Technology Guwahati
Wayne State University
Jožef Stefan Institute
University of Maribor
University of Hawai'i at Mānoa
Charles University
National Taiwan University
Max Planck Institute for Physics (Werner Heisenberg Institute)
National Central University
Hanyang University
Alikhanov Institute for Theoretical and Experimental Physics
Korea Institute of Science and Technology Information
Gyeongsang National University
Sungkyunkwan University
Technische Universität München
Moscow Engineering Physics Institute
German Electron Synchrotron
Tata Institute of Fundamental Research
Justus Liebig University Giessen
Nagoya University
Nara Women's University
Peking University
Tohoku University
Kennesaw State University
University of Melbourne
Kyungpook National University
Niigata University
Soongsil University
Korea University
University of Cincinnati
University of Ljubljana
Yonsei University
Indian Institute of Technology Madras
National Institute for Nuclear Physics
Osaka Metropolitan University
H. Niewodniczanski Institute of Nuclear Physics
Toho University
Kanagawa University
Seoul National University
Luther College, Decorah
University of Pittsburgh
Swiss Federal Institute of Technology Lausanne
University of the Basque Country
Ikerbasque Basque Foundation for Science
Austrian Academy of Sciences
Yamagata University
Institute of Science Tokyo
Institute for High Energy Physics
Tokyo Metropolitan University
University of Turin
Moscow Institute of Physics and Technology
University of Science and Technology of China

Research output: Contribution to journal › Article › peer-review

165 Scopus citations

Abstract

We report measurement of the cross section of e+e-→π+π-ψ(2S) between 4.0 and 5.5 GeV, based on an analysis of initial state radiation events in a 980fb-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 π+π-ψ(2S) with two coherent Breit-Wigner functions, we find two solutions with identical mass and width but different couplings to electron-positron pairs: MY(4360)=(4347±6±3)MeV/c2, ΓY(4360)=(103±9±5)MeV, MY(4660)=(4652±10±8)MeV/c2, ΓY(4660)=(68±11±1)MeV; and B[Y(4360)→π+π-ψ(2S)]·ΓY(4360)e+e-=(10.9±0.6±0.7)eV and B[Y(4660)→π+π-ψ(2S)]·ΓY(4660)e+e-=(8.1±1.1±0.5)eV for one solution; or B[Y(4360)→π+π-ψ(2S)]·ΓY(4360)e+e-=(9.2±0.6±0.6)eV and B[Y(4660)→π+π-ψ(2S)]·ΓY(4660)e+e-=(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 4.05GeV/c2 is observed in the π±ψ(2S) intermediate state in the Y(4360) decays.

Original language	English
Article number	112007
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	91
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.91.112007
State	Published - 12 Jun 2015

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10.1103/PhysRevD.91.112007

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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., Bračko, M., Browder, T. E., Červenkov, D., ... Zupanc, A. (2015). Measurement of e+e- →π+π-ψ (2S) via initial state radiation at Belle. Physical Review D - Particles, Fields, Gravitation and Cosmology, 91(11), Article 112007. https://doi.org/10.1103/PhysRevD.91.112007

@article{1534bba91eeb4d0786414517b47b8c7c,

title = "Measurement of e+e- →π+π-ψ (2S) via initial state radiation at Belle",

abstract = "We report measurement of the cross section of e+e-→π+π-ψ(2S) between 4.0 and 5.5 GeV, based on an analysis of initial state radiation events in a 980fb-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 π+π-ψ(2S) with two coherent Breit-Wigner functions, we find two solutions with identical mass and width but different couplings to electron-positron pairs: MY(4360)=(4347±6±3)MeV/c2, ΓY(4360)=(103±9±5)MeV, MY(4660)=(4652±10±8)MeV/c2, ΓY(4660)=(68±11±1)MeV; and B[Y(4360)→π+π-ψ(2S)]·ΓY(4360)e+e-=(10.9±0.6±0.7)eV and B[Y(4660)→π+π-ψ(2S)]·ΓY(4660)e+e-=(8.1±1.1±0.5)eV for one solution; or B[Y(4360)→π+π-ψ(2S)]·ΓY(4360)e+e-=(9.2±0.6±0.6)eV and B[Y(4660)→π+π-ψ(2S)]·ΓY(4660)e+e-=(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 4.05GeV/c2 is observed in the π±ψ(2S) intermediate state in the Y(4360) decays.",

author = "Wang, \{X. L.\} and Yuan, \{C. Z.\} and Shen, \{C. P.\} and P. Wang and A. Abdesselam and I. Adachi and H. Aihara and \{Al Said\}, S. and K. Arinstein and Asner, \{D. M.\} and R. Ayad and Bakich, \{A. M.\} and V. Bansal and B. Bhuyan and A. Bobrov and G. Bonvicini and M. Bra{\v c}ko and Browder, \{T. E.\} and D. {\v C}ervenkov and P. Chang and V. Chekelian and A. Chen and Cheon, \{B. G.\} and K. Chilikin and R. Chistov and K. Cho and V. Chobanova and Choi, \{S. K.\} and Y. Choi and D. Cinabro and J. Dalseno and M. Danilov and Z. Dole{\v Z}al and Z. Dr{\'a}sal and A. Drutskoy and K. Dutta and S. Eidelman and H. Farhat and Fast, \{J. E.\} and T. Ferber and V. Gaur and A. Garmash and D. Getzkow and R. Gillard and Goh, \{Y. M.\} and J. Haba and K. Hayasaka and H. Hayashii and He, \{X. H.\} and Hou, \{W. S.\} and T. Iijima and K. Inami and A. Ishikawa and R. Itoh and Y. Iwasaki and D. Joffe and T. Julius and Kang, \{K. H.\} and E. Kato and T. Kawasaki and C. Kiesling and Kim, \{D. Y.\} and Kim, \{H. J.\} and Kim, \{J. B.\} and Kim, \{J. H.\} and Kim, \{M. J.\} and Kim, \{S. H.\} and Kim, \{Y. J.\} and K. Kinoshita and Ko, \{B. R.\} and P. Kody{\v s} and S. Korpar and P. Kri{\v Z}an and P. Krokovny and A. Kuzmin and Kwon, \{Y. J.\} and Lange, \{J. S.\} and Lee, \{I. S.\} and P. Lewis and Y. Li and \{Li Gioi\}, L. and J. Libby and D. Liventsev and P. Lukin and D. Matvienko and K. Miyabayashi and H. Miyata and R. Mizuk and A. Moll and T. Mori and R. Mussa and E. Nakano and M. Nakao and T. Nanut and Z. Natkaniec and Nisar, \{N. K.\} and S. Nishida and S. Ogawa and S. Okuno and Olsen, \{S. L.\} and P. Pakhlov and G. Pakhlova and Park, \{C. W.\} and H. Park and Pedlar, \{T. K.\} and R. Pestotnik and M. Petri{\v c} and Piilonen, \{L. E.\} and E. Ribe{\v Z}l and M. Ritter and A. Rostomyan and S. Ryu and Y. Sakai and S. Sandilya and L. Santelj and T. Sanuki and V. Savinov and O. Schneider and G. Schnell and C. Schwanda and D. Semmler and K. Senyo and V. Shebalin and Shibata, \{T. A.\} and Shiu, \{J. G.\} and A. Sibidanov and F. Simon and Sohn, \{Y. S.\} and A. Sokolov and E. Solovieva and M. Stari{\v c} and M. Steder and T. Sumiyoshi and U. Tamponi and K. Tanida and G. Tatishvili and Y. Teramoto and K. Trabelsi and M. Uchida and T. Uglov and Y. Unno and S. Uno and Y. Usov and \{Van Hulse\}, C. and P. Vanhoefer and G. Varner and A. Vinokurova and Wagner, \{M. N.\} and Y. Watanabe and E. Won and S. Yashchenko and Y. Yusa and Zhang, \{Z. P.\} and V. Zhilich and A. Zupanc",

note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society.",

year = "2015",

month = jun,

day = "12",

doi = "10.1103/PhysRevD.91.112007",

language = "English",

volume = "91",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

publisher = "American Physical Society",

number = "11",

}

Wang, XL, Yuan, CZ, Shen, CP, Wang, P, Abdesselam, A, Adachi, I, Aihara, H, Al Said, S, Arinstein, K, Asner, DM, Ayad, R, Bakich, AM, Bansal, V, Bhuyan, B, Bobrov, A, Bonvicini, G, Bračko, M, Browder, TE, Červenkov, D, Chang, P, Chekelian, V, Chen, A, Cheon, BG, Chilikin, K, Chistov, R, Cho, K, Chobanova, V, Choi, SK, Choi, Y, Cinabro, D, Dalseno, J, Danilov, M, DoleŽal, Z, Drásal, Z, Drutskoy, A, Dutta, K, Eidelman, S, Farhat, H, Fast, JE, Ferber, T, Gaur, V, Garmash, A, Getzkow, D, Gillard, R, Goh, YM, Haba, J, Hayasaka, K, Hayashii, H, He, XH, Hou, WS, Iijima, T, Inami, K, Ishikawa, A, Itoh, R, Iwasaki, Y, Joffe, D, Julius, T, Kang, KH, Kato, E, Kawasaki, T, Kiesling, C, Kim, DY, Kim, HJ, Kim, JB, Kim, JH, Kim, MJ, Kim, SH, Kim, YJ, Kinoshita, K, Ko, BR, Kodyš, P, Korpar, S, KriŽan, P, Krokovny, P, Kuzmin, A, Kwon, YJ, Lange, JS, Lee, IS, Lewis, P, Li, Y, Li Gioi, L, 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, NK, Nishida, S, Ogawa, S, Okuno, S, Olsen, SL, Pakhlov, P, Pakhlova, G, Park, CW, Park, H, Pedlar, TK, Pestotnik, R, Petrič, M, Piilonen, LE, RibeŽl, 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, TA, Shiu, JG, Sibidanov, A, Simon, F, Sohn, YS, Sokolov, A, Solovieva, E, Starič, 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, MN, Watanabe, Y, Won, E, Yashchenko, S, Yusa, Y, Zhang, ZP, Zhilich, V & Zupanc, A 2015, 'Measurement of e+e- →π+π-ψ (2S) via initial state radiation at Belle', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 91, no. 11, 112007. https://doi.org/10.1103/PhysRevD.91.112007

TY - JOUR

T1 - Measurement of e+e- →π+π-ψ (2S) via initial state radiation at Belle

AU - Wang, X. L.

AU - Yuan, C. Z.

AU - Shen, C. P.

AU - Wang, P.

AU - Abdesselam, A.

AU - Adachi, I.

AU - Aihara, H.

AU - Al Said, S.

AU - Arinstein, K.

AU - Asner, D. M.

AU - Ayad, R.

AU - Bakich, A. M.

AU - Bansal, V.

AU - Bhuyan, B.

AU - Bobrov, A.

AU - Bonvicini, G.

AU - Bračko, M.

AU - Browder, T. E.

AU - Červenkov, D.

AU - Chang, P.

AU - Chekelian, V.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Chistov, R.

AU - Cho, K.

AU - Chobanova, V.

AU - Choi, S. K.

AU - Choi, Y.

AU - Cinabro, D.

AU - Dalseno, J.

AU - Danilov, M.

AU - DoleŽal, Z.

AU - Drásal, Z.

AU - Drutskoy, A.

AU - Dutta, K.

AU - Eidelman, S.

AU - Farhat, H.

AU - Fast, J. E.

AU - Ferber, T.

AU - Gaur, V.

AU - Garmash, A.

AU - Getzkow, D.

AU - Gillard, R.

AU - Goh, Y. M.

AU - Haba, J.

AU - Hayasaka, K.

AU - Hayashii, H.

AU - He, X. H.

AU - Hou, W. S.

AU - Iijima, T.

AU - Inami, K.

AU - Ishikawa, A.

AU - Itoh, R.

AU - Iwasaki, Y.

AU - Joffe, D.

AU - Julius, T.

AU - Kang, K. H.

AU - Kato, E.

AU - Kawasaki, T.

AU - Kiesling, C.

AU - Kim, D. Y.

AU - Kim, H. J.

AU - Kim, J. B.

AU - Kim, J. H.

AU - Kim, M. J.

AU - Kim, S. H.

AU - Kim, Y. J.

AU - Kinoshita, K.

AU - Ko, B. R.

AU - Kodyš, P.

AU - Korpar, S.

AU - KriŽan, P.

AU - Krokovny, P.

AU - Kuzmin, A.

AU - Kwon, Y. J.

AU - Lange, J. S.

AU - Lee, I. S.

AU - Lewis, P.

AU - Li, Y.

AU - Li Gioi, L.

AU - Libby, J.

AU - Liventsev, D.

AU - Lukin, P.

AU - Matvienko, D.

AU - Miyabayashi, K.

AU - Miyata, H.

AU - Mizuk, R.

AU - Moll, A.

AU - Mori, T.

AU - Mussa, R.

AU - Nakano, E.

AU - Nakao, M.

AU - Nanut, T.

AU - Natkaniec, Z.

AU - Nisar, N. K.

AU - Nishida, S.

AU - Ogawa, S.

AU - Okuno, S.

AU - Olsen, S. L.

AU - Pakhlov, P.

AU - Pakhlova, G.

AU - Park, C. W.

AU - Park, H.

AU - Pedlar, T. K.

AU - Pestotnik, R.

AU - Petrič, M.

AU - Piilonen, L. E.

AU - RibeŽl, E.

AU - Ritter, M.

AU - Rostomyan, A.

AU - Ryu, S.

AU - Sakai, Y.

AU - Sandilya, S.

AU - Santelj, L.

AU - Sanuki, T.

AU - Savinov, V.

AU - Schneider, O.

AU - Schnell, G.

AU - Schwanda, C.

AU - Semmler, D.

AU - Senyo, K.

AU - Shebalin, V.

AU - Shibata, T. A.

AU - Shiu, J. G.

AU - Sibidanov, A.

AU - Simon, F.

AU - Sohn, Y. S.

AU - Sokolov, A.

AU - Solovieva, E.

AU - Starič, M.

AU - Steder, M.

AU - Sumiyoshi, T.

AU - Tamponi, U.

AU - Tanida, K.

AU - Tatishvili, G.

AU - Teramoto, Y.

AU - Trabelsi, K.

AU - Uchida, M.

AU - Uglov, T.

AU - Unno, Y.

AU - Uno, S.

AU - Usov, Y.

AU - Van Hulse, C.

AU - Vanhoefer, P.

AU - Varner, G.

AU - Vinokurova, A.

AU - Wagner, M. N.

AU - Watanabe, Y.

AU - Won, E.

AU - Yashchenko, S.

AU - Yusa, Y.

AU - Zhang, Z. P.

AU - Zhilich, V.

AU - Zupanc, A.

PY - 2015/6/12

Y1 - 2015/6/12

N2 - We report measurement of the cross section of e+e-→π+π-ψ(2S) between 4.0 and 5.5 GeV, based on an analysis of initial state radiation events in a 980fb-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 π+π-ψ(2S) with two coherent Breit-Wigner functions, we find two solutions with identical mass and width but different couplings to electron-positron pairs: MY(4360)=(4347±6±3)MeV/c2, ΓY(4360)=(103±9±5)MeV, MY(4660)=(4652±10±8)MeV/c2, ΓY(4660)=(68±11±1)MeV; and B[Y(4360)→π+π-ψ(2S)]·ΓY(4360)e+e-=(10.9±0.6±0.7)eV and B[Y(4660)→π+π-ψ(2S)]·ΓY(4660)e+e-=(8.1±1.1±0.5)eV for one solution; or B[Y(4360)→π+π-ψ(2S)]·ΓY(4360)e+e-=(9.2±0.6±0.6)eV and B[Y(4660)→π+π-ψ(2S)]·ΓY(4660)e+e-=(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 4.05GeV/c2 is observed in the π±ψ(2S) intermediate state in the Y(4360) decays.

AB - We report measurement of the cross section of e+e-→π+π-ψ(2S) between 4.0 and 5.5 GeV, based on an analysis of initial state radiation events in a 980fb-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 π+π-ψ(2S) with two coherent Breit-Wigner functions, we find two solutions with identical mass and width but different couplings to electron-positron pairs: MY(4360)=(4347±6±3)MeV/c2, ΓY(4360)=(103±9±5)MeV, MY(4660)=(4652±10±8)MeV/c2, ΓY(4660)=(68±11±1)MeV; and B[Y(4360)→π+π-ψ(2S)]·ΓY(4360)e+e-=(10.9±0.6±0.7)eV and B[Y(4660)→π+π-ψ(2S)]·ΓY(4660)e+e-=(8.1±1.1±0.5)eV for one solution; or B[Y(4360)→π+π-ψ(2S)]·ΓY(4360)e+e-=(9.2±0.6±0.6)eV and B[Y(4660)→π+π-ψ(2S)]·ΓY(4660)e+e-=(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 4.05GeV/c2 is observed in the π±ψ(2S) intermediate state in the Y(4360) decays.

UR - https://www.scopus.com/pages/publications/84931282002

U2 - 10.1103/PhysRevD.91.112007

DO - 10.1103/PhysRevD.91.112007

M3 - Article

AN - SCOPUS:84931282002

SN - 1550-7998

VL - 91

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 11

M1 - 112007

ER -

Measurement of e+e- →π+π-ψ (2S) via initial state radiation at Belle

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