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We investigate the elastic photon-proton and photon-photon scattering in aholographic QCD model, focusing on the Regge regime. Considering contributionsof the Pomeron and Reggeon exchange, the total and differential cross sectionsare calculated. While our model involves several parameters, by virtue of theuniversality of the Pomeron and Reggeon, for most of them the values determinedin the preceding study on the proton-proton and proton-antiproton scatteringcan be employed. Once the two adjustable parameters, the Pomeron-photon andReggeon-photon coupling constant, are determined with the experimental data ofthe total cross sections, predicting the both cross sections in a widekinematic region, from the GeV to TeV scale, becomes possible. We show that thetotal cross section data can be well described within the model, and ourpredictions for the photon-proton differential cross section are consistentwith the data.

Holographic description of elastic photon-proton and photon-photon scattering