학술논문
Study of the reaction e+e-→ψ(2S)π+π- via initial-state radiation at BaBar
Document Type
article
Author
Lees, JP; Poireau, V; Tisserand, V; Tico, J Garra; Grauges, E; Palano, A; Eigen, G; Stugu, B; Brown, DN; Kerth, LT; Kolomensky, Yu G; Lynch, G; Koch, H; Schroeder, T; Asgeirsson, DJ; Hearty, C; Mattison, TS; McKenna, JA; So, RY; Khan, A; Blinov, VE; Buzykaev, AR; Druzhinin, VP; Golubev, VB; Kravchenko, EA; Onuchin, AP; Serednyakov, SI; Skovpen, Yu I; Solodov, EP; Todyshev, K Yu; Yushkov, AN; Bondioli, M; Kirkby, D; Lankford, AJ; Mandelkern, M; Atmacan, H; Gary, JW; Liu, F; Long, O; Vitug, GM; Campagnari, C; Hong, TM; Kovalskyi, D; Richman, JD; West, CA; Eisner, AM; Kroseberg, J; Lockman, WS; Martinez, AJ; Schumm, BA; Seiden, A; Chao, DS; Cheng, CH; Echenard, B; Flood, KT; Hitlin, DG; Ongmongkolkul, P; Porter, FC; Rakitin, AY; Andreassen, R; Huard, Z; Meadows, BT; Sokoloff, MD; Sun, L; Bloom, PC; Ford, WT; Gaz, A; Nauenberg, U; Smith, JG; Wagner, SR; Ayad, R; Toki, WH; Spaan, B; Schubert, KR; Schwierz, R; Bernard, D; Verderi, M; Clark, PJ; Playfer, S; Bettoni, D; Bozzi, C; Calabrese, R; Cibinetto, G; Fioravanti, E; Garzia, I; Luppi, E; Munerato, M; Negrini, M; Piemontese, L; Santoro, V; Baldini-Ferroli, R; Calcaterra, A; de Sangro, R; Finocchiaro, G; Patteri, P; Peruzzi, IM; Piccolo, M; Rama, M; Zallo, A; Contri, R
Source
Physical Review D. 89(11)
Subject
Language
Abstract
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.