Inclusive photoproduction of lepton pairs in the parton model

Abstract

In the framework of the QCD parton model, we study unpolarized scattering of high energy real photons from a proton target into lepton pairs and a system of hadrons. For a given parametrization of parton distributions in the proton, we calculate the cross section of this process and show the cancellation of the interference terms.

Probing the Nucleon’s Transversity and the Photon’s Distribution Amplitude in Lepton Pair Photoproduction

“…Moreover the timelike Compton process [20] (the exclusive analog of Drell Yan photoproduction) and its interference with the Bethe Heitler process, is in the analysis process [21]. The unpolarized Drell Yan cross section is estimated of the order a few picobarns for Q 2 values of a few GeV 2 in [17,22].…”

Inclusive and Exclusive Compton Processes in Quantum Chromodynamics

“…19: Compton cross section σ C (solid line) and Bethe-Heitler cross section σ BH (dashed line) plotted as a function of the angle θ γγ between the incoming virtual and outgoing real photon in the target rest frame for Q 2 1 = 2.5 GeV 2 and x B = 0.35 with ω = 5.75 GeV electron beam. both parts of the amplitude and accordingly, probe different linear combinations of OFPDs.By the inclusive photoproduction of lepton pairs, see Ref [100],. we refer to the reaction, in which a high-energy real photon γ (with the four-momentum q) scatters inelastically from a nucleon N (P ) emitting a pair of leptons (electrons or muons)…”