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

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/105185

Title:	Measurement of e+e- →π+π-ψ (2S) via initial state radiation at Belle
Authors:	陳鎰鋒;Yuan, C. Z.;Shen, C. P.;Wang, P.;Abdesselam, A.;Adachi, I.;Aihara, H.;Al Said, S.;Arinstein, K.;Asner, D. M.;Bhuyan, B.;Browder, T. E.;Chang, P.;Chekelian, V.;Chistov, R.;Cho, K.;Chobanova, V.;Choi, S.-K.;Choi, Y.;Cinabro, D.;Dalseno, J.;Doležal, Z.;Drutskoy, A.;Dutta, K.;Eidelman, S.;Farhat, H.;Fast, J. E.;Ferber, T.;Gaur, V.;Garmash, A.;He, X. H.;Hou, W.-S.;Iijima, T.;Inami, K.;Ishikawa, A.;Joffe, D.;Julius, T.;Kang, K. H.;Kato, E.;Kim, D. Y.;Kim, H. J.;Kim, J. B.;Kim, J. H.;Kim, S. H.;Kim, Y. J.;Kinoshita, K.;Korpar, S.;Krokovny, P.;Kuzmin, A.;Kwon, Y.-J.;Lange, J. S.;Lewis, P.;Li, Y.;Libby, J.;Liventsev, D.;Lukin, P.;Matvienko, D.;Miyabayashi, K.;Miyata, H.;Mizuk, R.;Mori, T.;Mussa, R.;Nakao, M.;Natkaniec, Z.;Nishida, S.;Ogawa, S.;Okuno, S.;Olsen, S. L.;Pakhlov, P.;Pakhlova, G.;Park, H.;Pestotnik, R.;Ribežl, E.;Rostomyan, A.;Sakai, Y.;Sanuki, T.;Savinov, V.;Schneider, O.;Schnell, G.;Semmler, D.;Shebalin, V.;Shibata, T.-A.;Shiu, J.-G.;Sibidanov, A.;Sohn, Y.-S.;Solovieva, E.;Starič, M.;Steder, M.;Tanida, K.;Tatishvili, G.;Trabelsi, K.;Unno, Y.;Uno, S.;Van Hulse, C.;Varner, G.;Vinokurova, A.;Wagner, M. N.;Yashchenko, S.;Yusa, Y.;Zhilich, V.;Zupanc, A.
Contributors:	理學院物理學系
Date:	2015-06-12
Issue Date:	2026-04-23 12:10:04 (UTC+8)
Publisher:	American Physical Society;United States: American Physical Society (APS)
Abstract:	摘要： We report here 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 discover two solutions with identical mass and width but different couplings to electron-positron pairs: MY ( 4360 ) = ( 4347±6±3 ) MeV / c2 , Γ Y ( 4360 ) = ( 103±9±5 ) MeV , MY ( 4660 ) = ( 4652±10±8 ) MeV / c2 , Γ Y ( 4660 ) = ( 68±11±1 ) MeV ; and B [ Y ( 4360 ) → π+π-ψ ( 2S ) ] · Γ Y ( 4360 ) e+e-= ( 10.9±0.6±0.7 ) eV and B [ Y ( 4660 ) → π+π-ψ ( 2S ) ] · Γ Y ( 4660 ) e+e-= ( 8.1±1.1±0.5 ) eV for one solution; or B [ Y ( 4360 ) → π+π-ψ ( 2S ) ] · Γ Y ( 4360 ) e+e-= ( 9.2±0.6±0.6 ) eV and B [ Y ( 4660 ) → π+π=ψ ( 2S ) ] · Γ Y ( 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. decays. 出版者： United States: American Physical Society (APS) 出版日期： 2015-06-12 出處： Physical review. D, Particles, fields, gravitation, and cosmology, 2015-06, Vol.91 (11), Article 112007 識別號： ISSN: 1550-7998 識別號： EISSN: 1550-2368 識別號： DOI: 10.1103/PhysRevD.91.112007
Appears in Collections:	[Department of Physics] journal & Dissertation

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