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Study of the e+ e- → π+ π- π0 process using initial state radiation with BABAR

  • Author(s): Aubert, B;
  • Barate, R;
  • Boutigny, D;
  • Couderc, F;
  • Gaillard, JM;
  • Hicheur, A;
  • Karyotakis, Y;
  • Lees, JP;
  • Tisserand, V;
  • Zghiche, A;
  • Palano, A;
  • Pompili, A;
  • Chen, JC;
  • Qi, ND;
  • Rong, G;
  • Wang, P;
  • Zhu, YS;
  • Eigen, G;
  • Ofte, I;
  • Stugu, B;
  • Abrams, GS;
  • Borgland, AW;
  • 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;
  • Shelkov, VG;
  • 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;
  • Steinke, M;
  • Boyd, JT;
  • Chevalier, N;
  • Cottingham, WN;
  • Kelly, MP;
  • Latham, TE;
  • Wilson, FF;
  • Cuhadar-Donszelmann, T;
  • Hearty, C;
  • Knecht, NS;
  • Mattison, TS;
  • McKenna, JA;
  • Thiessen, D;
  • Khan, A;
  • Kyberd, P;
  • Teodorescu, L;
  • Blinov, AE;
  • Blinov, VE;
  • Druzhinin, VP;
  • Golubev, VB;
  • Ivanchenko, VN;
  • Kravchenko, EA;
  • Onuchin, AP;
  • Serednyakov, SI;
  • Skovpen, YI;
  • Solodov, EP;
  • Yushkov, AN;
  • Best, D;
  • Bruinsma, M;
  • Chao, M;
  • Eschrich, I;
  • Kirkby, D;
  • Lankford, AJ;
  • Mandelkern, M;
  • Mommsen, RK;
  • Roethel, W;
  • Stoker, DP;
  • Buchanan, C;
  • Hartfiel, BL;
  • Foulkes, SD;
  • Gary, JW
  • et al.
Abstract

The process e+ e- → π+ π- π0 γ has been studied at a center-of-mass energy near the Y(4S) resonance using a 89.3 fb-1 data sample collected with the BABAR detector at the PEP-II collider. From the measured 3π mass spectrum we have obtained the products of branching fractions for the ω and φ mesons, B(ω → e+ e-) B(ω → 3π) = (6.70 ± 0.06 ± 0.27) × 10 -5 and B(φ → e+e-)B(φ → 3π) = (4.30 ± 0.08 ± 0.21) × 10-5 and evaluated the e+ e- → π+ π- π0 cross section for the e+ e - center-of-mass energy range 1.05 to 3.00 GeV. About 900 e + e- → J/ψγ → π+ π- π0 γ events have been selected and the branching fraction B(J/ψ → π+ π- π0) = (2.18 ± 0.19)% has been measured.

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