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Measurement of the e+e− → p¯p cross section in the energy range from 3.0 to 6.5 GeV
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The e + e − → p ¯ p cross section and the proton magnetic form factor have been measured in the center-of-mass energy range from 3.0 to 6.5 GeV using the initial-state radiation technique with an undetected photon. This is the first measurement of the form factor at energies higher than 4.5 GeV. The analysis is based on 469 fb − 1 of integrated luminosity collected with the BABAR detector at the PEP-II collider at e + e − center-of-mass energies near 10.6 GeV. The branching fractions for the decays J / ψ → p ¯ p and ψ ( 2 S ) → p ¯ p have also been measured.
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GRAUGÉS POUS, Eugeni and BABAR Collaboration. Measurement of the e+e− → p¯p cross section in the energy range from 3.0 to 6.5 GeV. Physical Review D. 2013. Vol. 88, num. 7, pags. 072009. ISSN 1550-7998. [consulted: 3 of August of 2026]. Available at: https://hdl.handle.net/2445/131772