Details

Autor(en) / Beteiligte

• 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.

Titel

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

Ist Teil von

• Physical review. D, Particles, fields, gravitation, and cosmology, 2015-06, Vol.91 (11), Article 112007

Ort / Verlag

United States: American Physical Society (APS)

Erscheinungsjahr

2015

Link zum Volltext

Quelle

APS_美国物理学会过刊

Beschreibungen/Notizen

• 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.