The process e+e-→pp¯γ is studied using 469fb-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 pp¯ invariant mass spectrum, the energy dependence of the cross section for e+e-→pp¯ 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 pp¯ masses below 3 GeV. The branching fractions for the decays J/ψ→pp¯ and ψ(2S)→pp¯ are also determined.
Titolo: | Study of e^{+}e^{-}→pp[over ¯] via initial-state radiation at BABAR |
Autori: | |
Data di pubblicazione: | 2013 |
Rivista: | |
Abstract: | The process e+e-→pp¯γ is studied using 469fb-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 pp¯ invariant mass spectrum, the energy dependence of the cross section for e+e-→pp¯ 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 pp¯ masses below 3 GeV. The branching fractions for the decays J/ψ→pp¯ and ψ(2S)→pp¯ are also determined. |
Handle: | http://hdl.handle.net/11368/2768736 |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevD.87.092005 |
Appare nelle tipologie: | 1.1 Articolo in Rivista |
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