Accès ouvert déclaré
2014
article
Study of the reaction e+e- →ψ (2S)π+π- via initial-state radiation at B a B ar
Jp Lees, V Poireau, V Tisserand, J Garra Tico, E Grauges, A Palano, G Eigen, B Stugu, DN Brown, LT Kerth, YG Kolomensky, G Lynch, H Koch, T Schroeder, Dj Asgeirsson, C Hearty, Ts Mattison, JA McKenna, RY So, A Khan, VE Blinov, AR Buzykaev, VP Druzhinin, VB Golubev, EA Kravchenko, AP Onuchin, SI Serednyakov, YI Skovpen, Ep Solodov, KY Todyshev, AN Yushkov, M Bondioli, D Kirkby, AJ Lankford, M Mandelkern, H Atmacan, JW Gary, F Liu, O Long, G. Vitug, C Campagnari, TM Hong, D Kovalskyi, JD Richman, CA West, AM Eisner, J Kroseberg, WS Lockman, AJ Martinez, BA Schumm, A Seiden, DS Chao, CH Cheng, B Echenard, KT Flood, DG Hitlin, P Ongmongkolkul, FC Porter, AY Rakitin, R Andreassen, Z Huard, BT Meadows, MD Sokoloff, L Sun, Pc Bloom, WT Ford, A Gaz, U Nauenberg, JG Smith, SR Wagner, R Ayad, WH Toki, B Spaan, KR Schubert, R Schwierz, D Bernard, M Verderi, PJ Clark, S Playfer, D Bettoni, C Bozzi, R Calabrese, G Cibinetto, E Fioravanti, I Garzia, E Luppi, M Munerato, M Negrini, L Piemontese, V Santoro, R Baldini-Ferroli, A Calcaterra, R De Sangro, G Finocchiaro, P Patteri, Im Peruzzi, M Piccolo, M Rama, A Zallo, R Contri
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Le résumé fourni par la source
We study the process e+e-→ψ(2S)π+π- with initial-state-radiation events produced at the PEP-II asymmetric-energy collider. The data were recorded with the BABAR detector at center-of-mass energies at and near the (nS) (n=2,3,4) resonances and correspond to an integrated luminosity of 520fb-1. We investigate the ψ(2S)π+π- mass distribution from 3.95 to 5.95GeV/c2, and measure the center-of-mass energy dependence of the associated e+e-→ψ(2S)π+π- cross section. The mass distribution exhibits evidence of two resonant structures. A fit to the ψ(2S)π+π- mass distribution corresponding to the decay mode ψ(2S)→J/ψπ+π- yields a mass value of 4340±16(stat) ±9(syst)MeV/c2 and a width of 94±32(stat)±13(syst)MeV for the first resonance, and for the second a mass value of 4669±21(stat) ±3(syst)MeV/c2 and a width of 104±48(stat)±10(syst)MeV. In addition, we show the π+π- mass distributions for these resonant regions. © 2014 American Physical Society.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
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Les sujets associés
Quantum Chromodynamics and Particle InteractionsParticle physics theoretical and experimental studiesNuclear physics research studies