The process e+e−→ppbarγ is studied using 469  fb−1 of integrated luminosity collected with the BABAR detector at the SLAC National Accelerator Laboratory, at an e+e− center-of-mass energy of 10.6 GeV. From the analysis of the ppbar invariant mass spectrum, the energy dependence of the cross section for e+e−→ppbar is measured from threshold to 4.5 GeV. The energy dependence of the ratio of electric and magnetic form factors, |GE/GM|, and the asymmetry in the proton angular distribution are measured for ppbar masses below 3 GeV. The branching fractions for the decays J/ψ→ppbar and ψ(2S)→ppbar are also determined.

Study of e(+)e(-) -> p(p)over-bar via initial-state radiation at BABAR

CONTRI, ROBERTO;GUIDO, ELISA;LO VETERE, MAURIZIO;MONGE, MARIA ROBERTA;
2013-01-01

Abstract

The process e+e−→ppbarγ is studied using 469  fb−1 of integrated luminosity collected with the BABAR detector at the SLAC National Accelerator Laboratory, at an e+e− center-of-mass energy of 10.6 GeV. From the analysis of the ppbar invariant mass spectrum, the energy dependence of the cross section for e+e−→ppbar is measured from threshold to 4.5 GeV. The energy dependence of the ratio of electric and magnetic form factors, |GE/GM|, and the asymmetry in the proton angular distribution are measured for ppbar masses below 3 GeV. The branching fractions for the decays J/ψ→ppbar and ψ(2S)→ppbar are also determined.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/696075
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