Parity-Violating Asymmetry in Exclusive Photoproduction of Lepton Pairs from Protons

H. Konashi, K. Ushio, Y. Yokoo
1980 Progress of theoretical physics  
The neutral-current effects in the exclusive lepton pair production with a circularly polarized photon beam on a proton target are discussed. We derive the parity-violating asymmetry for the lepton produced by rightand left-handed photons. It is expressed in terms of the well-known electromagnetic and weak form factors of the nucleons. Numerical calculations are given in the standard Weinberg-Salam model. We show the asymmetry as a function of the lepton energy in some kinematical
more » ... tical configurations. The neutral-current effects are of order 10-7 "'-'10-' in the lepton production angle range from 1o to 10° for the incident photon energy of 20 GeV.
doi:10.1143/ptp.63.2032 fatcat:xluvpe6vdzdaroorgszsubqpum