Observation of a broad structure in the pi(+)pi(-)J/psi mass spectrum around 4.26 GeV/c(2)

Aubert, B; Barate, R; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, Jp; Poireau, V; Tisserand, V; Zghiche, A; Grauges, E; Palano, A; Pappagallo, M; Pompili, A; Chen, Jc; Nd, Qi; Rong, G; Wang, P; Zhu, Ys; Eigen, G; Ofte, I; Stugu, B; Abrams, Gs; Battaglia, M; Breon, Ab; Brown, Dn; Button Shafer, J; Cahn, Rn; Charles, E; Day, Ct; Gill, Ms; Gritsan, Av; Groysman, Y; Jacobsen, Rg; Kadel, Rw; Kadyk, J; Kerth, Lt; Kolomensky, Yg; Kukartsev, G; Lynch, G; Mir, Lm; Oddone, Pj; Orimoto, Tj; Pripstein, M; Roe, Na; Ronan, Mt; Wenzel, Wa; Barrett, M; Ford, Ke; Harrison, Tj; Hart, Aj; Hawkes, Cm; Morgan, Se; Watson, At; Fritsch, M; Goetzen, K; Held, T; Koch, H; Lewandowski, B; Pelizaeus, M; Peters, K; Schroeder, T; Steinke, M; Boyd, Jt; Burke, Jp; Chevalier, N; Cottingham, Wn; Cuhadar Donszelmann, T; Fulsom, Bg; Hearty, C; Knecht, Ns; Mattison, Ts; Mckenna, Ja; Khan, A; Kyberd, P; Saleem, M; Teodorescu, L; Blinov, Ae; Blinov, Ve; Bukin, Ad; Druzhinin, Vp; Golubev, Vb; Kravchenko, Ea; Onuchin, Ap; Serednyakov, Si; Skovpen, Yi; Solodov, Ep; Yushkov, An; Best, D; Bondioli, M; Bruinsma, M; Chao, M; Curry, S; Eschrich, I; Kirkby, D; Lankford, Aj; Lund, P; Mandelkern, M; Mommsen, Rk; Roethel, W; Stoker, Dp; Buchanan, C; Hartfiel, Bl; Ajr, Weinstein; Foulkes, Sd; Gary, Jw; Long, O; Shen, Bc; Wang, K; Zhang, L; del Re, D; Hadavand, Hk; Hill, Ej; Macfarlane, Db; Paar, Hp; Rahatlou, S; Sharma, V; Berryhill, Jw; Campagnari, C; Cunha, A; Dahmes, B; Hong, Tm; Mazur, Ma; Richman, Jd; Verkerke, W; Beck, Tw; Eisner, Am; Flacco, Cj; Heusch, Ca; Kroseberg, J; Lockman, Ws; Nesom, G; Schalk, T; Schumm, Ba; Seiden, A; Spradlin, P; Williams, Dc; Wilson, Mg; Albert, J; Chen, E; Dubois Felsmann GP,; Dvoretskii, A; Hitlin, Dg; Narsky, I; Piatenko, T; Porter, Fc; Ryd, A; Samuel, A; Andreassen, R; Jayatilleke, S; Mancinelli, G; Meadows, Bt; Sokoloff, Md; Blanc, F; Bloom, P; Chen, S; Ford, Wt; Hirschauer, Jf; Kreisel, A; Nauenberg, U; Olivas, A; Rankin, P; Ruddick, Wo; Smith, Jg; Ulmer, Ka; Wagner, Sr; Zhang, J; Chen, A; Eckhart, Ea; Soffer, A; Toki, Wh; Wilson, Rj; Zeng, Q; Altenburg, D; Feltresi, E; Hauke, A; Spaan, B; Brandt, T; Brose, J; Dickopp, M; Klose, V; Lacker, Hm; Nogowski, R; Otto, S; Petzold, A; Schott, G; Schubert, J; Schubert, Kr; Schwierz, R; Sundermann, Je; Bernard, D; Bonneaud, Gr; Grenier, P; Schrenk, S; Thiebaux, C; Vasileiadis, G; Verderi, M; Bard, Dj; Clark, Pj; Gradl, W; Muheim, F; Playfer, S; Xie, Y; Andreotti, M; Azzolini, V; Bettoni, D; Bozzi, C; Calabrese, R; Cibinetto, G; Luppi, E; Negrini, M; Piemontese, L; Anulli, F; Baldini Ferroli, R; Calcaterra, A; de Sangro, R; Finocchiaro, G; Patteri, P; Peruzzi, Im; Piccolo, M; Zallo, A; Buzzo, A; Capra, R; Contri, R; Lo Vetere, M; Macri, M; Monge, Mr; Passaggio, S; Patrignani, C; Robutti, E; Santroni, A; Tosi, S; Brandenburg, G; Chaisanguanthum, Ks; Morii, M; Won, E; J, Wu; Dubitzky, Rs; Langenegger, U; Marks, J; Schenk, S; Uwer, U; Bhimji, W; Bowerman, Da; Dauncey, Pd; Egede, U; Flack, Rl; Gaillard, Jr; Morton, Gw; Nash, Ja; Nikolich, Mb; Taylor, Gp; Vazquez, Wp; Charles, Mj; Mader, Wf; Mallik, U; Mohapatra, Ak; Cochran, J; Crawley, Hb; Eyges, V; Meyer, Wt; Prell, S; Rosenberg, Ei; Rubin, Ae; J, Yi; Arnaud, N; Davier, M; Giroux, X; Grosdidier, G; Hocker, A; Le Diberder, F; Lepeltier, V; Lutz, Am; Oyanguren, A; Petersen, Tc; Pierini, M; Plaszczynski, S; Rodier, S; Roudeau, P; Schune, Mh; Stocchi, A; Wormser, G; Cheng, Ch; Lange, Dj; Simani, Mc; Wright, Dm; Bevan, Aj; Chavez, Ca; Forster, Ij; Fry, Jr; Gabathuler, E; Gamet, R; George, Ka; Hutchcroft, De; Parry, Rj; Payne, Dj; Schofield, Kc; Touramanis, C; Cormack, Cm; Di Lodovico, F; Menges, W; Sacco, R; Brown, Cl; Cowan, G; Flaecher, Hu; Green, Mg; Hopkins, Da; Jackson, Ps; Mcmahon, Tr; Ricciardi, S; Salvatore, F; Brown, D; Davis, Cl; Allison, J; Barlow, Nr; Barlow, Rj; Edgar, Cl; Hodgkinson, Mc; Kelly, Mp; Lafferty, Gd; Naisbit, Mt; Williams, Jc; Chen, C; Hulsbergen, Wd; Jawahery, A; Kovalskyi, D; Lae, Ck; Roberts, Da; Simi, G; Blaylock, G; Dallapiccola, C; Hertzbach, Ss; Kofler, R; Koptchev, Vb; X, Li; Moore, Tb; Saremi, S; Staengle, H; Willocq, S; Cowan, R; Koeneke, K; Sciolla, G; Sekula, Sj; Spitznagel, M; Taylor, F; Yamamoto, Rk; Kim, H; Patel, Pm; Robertson, Sh; Lazzaro, A; Lombardo, V; Palombo, F; Bauer, Jm; Cremaldi, L; Eschenburg, V; Godang, R; Kroeger, R; Reidy, J; Sanders, Da; Summers, Dj; Zhao, Hw; Brunet, S; Cote, D; Taras, P; Viaud, B; Nicholson, H; Cavallo, N; De Nardo, G; Fabozzi, F; Gatto, C; Lista, L; Monorchio, D; Paolucci, P; Piccolo, D; Sciacca, C; Baak, M; Bulten, H; Raven, G; Snoek, Hl; Wilden, L; Jessop, Cp; Losecco, Jm; Allmendinger, T; Benelli, G; Gan, Kk; Honscheid, K; Hufnagel, D; Jackson, Pd; Kagan, H; Kass, R; Pulliam, T; Rahimi, Am; Ter Antonyan, R; Wong, Qk; Brau, J; Frey, R; Igonkina, O; M, Lu; Potter, Ct; Sinev, Nb; Strom, D; Strube, J; Torrence, E; Galeazzi, F; Margoni, M; Morandin, M; Posocco, M; Rotondo, M; Simonetto, F; Stroili, R; Voci, C; Benayoun, M; Briand, H; Chauveau, J; David, P; Del Buono, L; de la Vaissiere, C; Hamon, O; Mjj, John; Leruste, P; Malcles, J; Ocariz, J; Roos, L; Therin, G; Behera, Pk; Gladney, L; Guo, Qh; Panetta, J; Biasini, M; Covarelli, R; Pacetti, S; Pioppi, M; Angelini, Carlo; Batignani, Giovanni; Bettarini, Stefano; Bucci, F; Calderini, Giovanni; Carpinelli, M; Cenci, R; Forti, Francesco; Giorgi, Marcello; Lusiani, A; Marchiori, G; Morganti, M; Neri, N; Paoloni, Eugenio; Rama, M; Rizzo, Giuliana; Walsh, J; Haire, M; Judd, D; Wagoner, De; Biesiada, J; Danielson, N; Elmer, P; Lau, Yp; C, Lu; Olsen, J; Ajs, Smith; Telnov, Av; Bellini, F; Cavoto, G; D'Orazio, A; Di Marco, E; Faccini, R; Ferrarotto, F; Ferroni, F; Gaspero, M; Li Gioi, L; Mazzoni, Ma; Morganti, S; Piredda, G; Polci, F; Safai Tehrani, F; Voena, C; Schroder, H; Wagner, G; Waldi, R; Adye, T; De Groot, N; Franek, B; Gopal, Gp; Olaiya, Eo; Wilson, Ff; Aleksan, R; Emery, S; Gaidot, A; Ganzhur, Sf; Giraud, Pf; Graziani, G; Hamel de Monchenault, G; Kozanecki, W; Legendre, M; London, Gw; Mayer, B; Vasseur, G; Yeche, C; Zito, M; Purohit, Mv; Weidemann, Aw; Wilson, Jr; Yumiceva, Fx; Abe, T; Allen, Mt; Aston, D; van Bakel, N; Bartoldus, R; Berger, N; Boyarski, Am; Buchmueller, Ol; Claus, R; Coleman, Jp; Convery, Mr; Cristinziani, M; Dingfelder, Jc; Dong, D; Dorfan, J; Dujmic, D; Dunwoodie, W; Fan, S; Field, Rc; Glanzman, T; Gowdy, Sj; Hadig, T; Halyo, V; Hast, C; Hryn'Ova, T; Innes, Wr; Kelsey, Mh; Kim, P; Kocian, Ml; Dwgs, Leith; Libby, J; Luitz, S; Luth, V; Lynch, Hl; Marsiske, H; Messner, R; Muller, Dr; O'Grady, Cp; Ozcan, Ve; Perazzo, A; Perl, M; Ratcliff, Bn; Roodman, A; Salnikov, Aa; Schindler, Rh; Schwiening, J; Snyder, A; Stelzer, J; D, Su; Sullivan, Mk; Suzuki, K; Swain, S; Thompson, Jm; Va'Vra, J; Weaver, M; Wisniewski, Wj; Wittgen, M; Wright, Dh; Yarritu, Ak; K, Yi; Young, Cc; Burchat, Pr; Edwards, Aj; Majewski, Sa; Petersen, Ba; Roat, C; Ahmed, M; Ahmed, S; Alam, Ms; Ernst, Ja; Saeed, Ma; Wappler, Fr; Zain, Sb; Bugg, W; Krishnamurthy, M; Spanier, Sm; Eckmann, R; Ritchie, Jl; Satpathy, A; Schwitters, Rf; Izen, Jm; Kitayama, I; Lou, Xc; Williams, G; S, Ye; Bianchi, F; Bona, M; Gallo, F; Gamba, D; Bomben, M; Bosisio, L; Cartaro, C; Cossutti, F; Della Ricca, G; Dittongo, S; Grancagnolo, S; Lanceri, L; Vitale, L; Martinez Vidal, F; Panvini, Rs; Banerjee, S; Bhuyan, B; Brown, Cm; Fortin, D; Hamano, K; Kowalewski, R; Roney, Jm; Sobie, Rj; Back, Jj; Harrison, Pf; Latham, Te; Mohanty, Gb; Band, Hr; Chen, X; Cheng, B; Dasu, S; Datta, M; Eichenbaum, Am; Flood, Kt; Graham, M; Hollar, Jj; Johnson, Jr; Kutter, Pe; H, Li; Liu, R; Mellado, B; Mihalyi, A; Pan, Y; Prepost, R; Tan, P; von Wimmersperg Toeller JH,; Sl, Wu; Z, Yu; Neal, H.

doi:10.1103/PhysRevLett.95.142001

We study initial-state radiation events, e(+)e(-)->gamma(ISR)pi(+)pi(-)J/psi, with data collected with the BABAR detector. We observe an accumulation of events near 4.26 GeV/c(2) in the invariant-mass spectrum of pi(+)pi(-)J/psi. Fits to the mass spectrum indicate that a broad resonance with a mass of about 4.26 GeV/c(2) is required to describe the observed structure. The presence of additional narrow resonances cannot be excluded. The fitted width of the broad resonance is 50 to 90 MeV/c(2), depending on the fit hypothesis. RI Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Patrignani, Claudia/C-5223-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; Roe, Natalie/A-8798-2012; Neri, Nicola/G-3991-2012; Monge, Maria Roberta/G-9127-2012