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. ChangV. 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, Eunil Won, S. Yashchenko, Y. Yusa, Z. P. Zhang, V. Zhilich, A. Zupanc

Research output: Contribution to journalArticle

76 Citations (Scopus)

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 languageEnglish
Article number112007
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume91
Issue number11
DOIs
Publication statusPublished - 2015 Jun 12

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electron-positron pairs
radiation
mass spectra
detectors
cross sections
decay

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Wang, X. L., Yuan, C. Z., Shen, C. P., Wang, P., Abdesselam, A., Adachi, I., ... 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), [112007]. https://doi.org/10.1103/PhysRevD.91.112007

Measurement of e+e- →π+π-ψ (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.; Bračko, M.; Browder, T. E.; Červenkov, 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.; DoleŽal, Z.; Drásal, 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.; Kodyš, P.; Korpar, S.; KriŽan, P.; Krokovny, P.; Kuzmin, A.; Kwon, Y. J.; Lange, J. S.; Lee, I. S.; 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, 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.; Petrič, M.; Piilonen, L. E.; 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, T. A.; Shiu, J. G.; Sibidanov, A.; Simon, F.; Sohn, Y. S.; 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, M. N.; Watanabe, Y.; Won, Eunil; Yashchenko, S.; Yusa, Y.; Zhang, Z. P.; Zhilich, V.; Zupanc, A.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 91, No. 11, 112007, 12.06.2015.

Research output: Contribution to journalArticle

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
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. ; 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. ; DoleŽal, Z. ; Drásal, 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. ; Kodyš, P. ; Korpar, S. ; KriŽan, P. ; Krokovny, P. ; Kuzmin, A. ; Kwon, Y. J. ; Lange, J. S. ; Lee, I. S. ; 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, 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. ; Petrič, M. ; Piilonen, L. E. ; 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, T. A. ; Shiu, J. G. ; Sibidanov, A. ; Simon, F. ; Sohn, Y. S. ; 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, M. N. ; Watanabe, Y. ; Won, Eunil ; Yashchenko, S. ; Yusa, Y. ; Zhang, Z. P. ; Zhilich, V. ; Zupanc, A. / Measurement of e+e- →π+π-ψ (2S) via initial state radiation at Belle. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2015 ; Vol. 91, No. 11.
@article{6e6abe4b8ff44d488e2e6ea5577eb5e3,
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. Bračko and Browder, {T. E.} and D. Červenkov 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. DoleŽal 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. Kodyš and S. Korpar and P. KriŽan 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. Petrič and Piilonen, {L. E.} and E. RibeŽl 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. Starič 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 Eunil Won and S. Yashchenko and Y. Yusa and Zhang, {Z. P.} and V. Zhilich and A. Zupanc",
year = "2015",
month = "6",
day = "12",
doi = "10.1103/PhysRevD.91.112007",
language = "English",
volume = "91",
journal = "Physical review D: Particles and fields",
issn = "0556-2821",
publisher = "American Institute of Physics Publising LLC",
number = "11",

}

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, Eunil

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.

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U2 - 10.1103/PhysRevD.91.112007

DO - 10.1103/PhysRevD.91.112007

M3 - Article

AN - SCOPUS:84931282002

VL - 91

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 0556-2821

IS - 11

M1 - 112007

ER -