Contributors: Lees, Jp; Poireau, V; Tisserand, V; Grauges, E; Palano, A; Eigen, G; Brown, Dn; Kolomensky, Yg; Fritsch, M; Koch, H; Schroeder, T; Cheaib, R; Hearty, C; Mattison, T; Mckenna, Ja; So, Ry; Blinov, Ve; Buzykaev, Ar; Druzhinin, Vp; Golubev, Vb; Kozyrev, Ea; Kravchenko, Ea; Onuchin, Ap; Serednyakov, Si; Skovpen, Yi; Solodov, Ep; Todyshev, Ky; Lankford, Aj; Dey, B; Gary, Jw; Long, O; Eisner, Am; Lockman, W; Vazquez, Wp; Chao, D; Cheng, Ch; Echenard, B; Flood, Kt; Hitlin, Dg; Kim, J; Li, Y; Lin, Dx; Middleton, S; Miyashita, T; Ongmongkolkul, P; Oyang, J; Porter, Fc; Rohrken, M; Huard, Z; Meadows, Bt; Pushpawela, Bg; Sokoloff, Md; Sun, L; Smith, Jg; Wagner, Sr; Bernard, D; Verderi, M; Bettoni, D; Bozzi, C; Calabrese, R; Cibinetto, G; Fioravanti, E; Garzia, I; Luppi, E; Santoro, V; Calcaterra, A; de Sangro, R; Finocchiaro, G; Martellotti, S; Patteri, P; Peruzzi, Im; Piccolo, M; Rotondo, M; Zallo, A; Passaggio, S; Patrignani, C; Shuve, Bj; Lacker, Hm; Bhuyan, B; Mallik, U; Chen, C; Cochran, J; Prell, S; Gritsan, Av; Arnaud, N; Davier, M; Le Diberder, F; Lutz, Am; Wormser, G; Lange, Dj; Wright, Dm; Coleman, Jp; Gabathuler, E; Hutchcroft, De; Payne, Dj; Touramanis, C; Bevan, Aj; Di Lodovico, F; Sacco, R; Cowan, G
نبذة مختصرة : The process e(+)e(-) -> pi(+) pi(-) pi(0)gamma is studied at a center-of-mass energy near the Upsilon(4S) resonance using a data sample of 469 fb(-1) collected with the BABAR detector at the PEP-II collider. We have performed a precise measurement of the e(+)e(-) -> pi(+) pi(-) pi(0) cross section in the center-of-mass energy range from 0.62 to 3.5 GeV. In the energy regions of the omega and phi resonances, the cross section is measured with a systematic uncertainty of 1.3%. The leading-order hadronic contribution to the muon magnetic anomaly calculated using the measured e(+) e(-) -> pi(+) pi(-) pi(0) cross section from threshold to 2.0 GeV is (45.86 +/- 0.14 +/- 0.58) x 10(-10). From the fit to the measured 3 pi mass spectrum we have determined the resonance parameters Gamma(omega -> e(+)e(-)) B(omega -> pi(+) pi- pi(0)) = (0.5698 +/- 0.0031 +/- 0.0082) keV, Gamma(phi -> e(+)e(-)) B(phi -> pi(+) pi(-)pi(0)) = (0.1841 +/- 0.0021 +/- 0.0080) keV, and B(rho -> 3 pi) = (0.88 +/- 0.23 +/- 0.30) x 10(-4). The significance of the rho -> 3 pi signal is greater than 6 sigma. For the J/psi resonance we have measured the product Gamma(J/psi -> e(+) e(-)) B (J/psi -> 3 pi) = (0.1248 +/- 0.0019 +/- 0.0026) keV.
Processing Request
No Comments.