Journal article

Publication year: 1997

Pages: 1-6

Journal: Physics Letters B

Volume number: 402

Issue number: 1-2

ISSN: 0370-2693

Open access status: Green

DOI Link: https://doi.org/10.1016/S0370-2693(97)00389-4

Publisher: Elsevier

Abstract: 
We show that lepton-pair production in virtual Compton scattering offers, through interference with the well-known Bethe-Heitler process, a sensitive probe to separate longitudinal and transverse response at positive photon invariant masses. This interference can be measured directly in terms of an asymmetry. The role of off-shell effects in the NN gamma vertices is investigated as well. An additional NN gamma gamma contact term in the amplitude, included to ensure gauge invariance of the model, cancels a substantial part of the off-shell effects, but introduces ambiguities which affect observables. The response of nucleon resonances is also investigated. (C) 1997 Elsevier Science B.V.

Harvard Citation style: Korchin, A., Scholten, O. and deJong, F. (1997) Lepton-pair production in virtual Compton scattering off the proton, Physics Letters B, 402(1-2), pp. 1-6. https://doi.org/10.1016/S0370-2693(97)00389-4

APA Citation style: Korchin, A., Scholten, O., & deJong, F. (1997). Lepton-pair production in virtual Compton scattering off the proton. Physics Letters B. 402(1-2), 1-6. https://doi.org/10.1016/S0370-2693(97)00389-4