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Parton distributions incorporating QED contributions
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We perform a global parton analysis of deep inelastic and related hard-scattering data, including ${\cal O}(\alpha_{\rm QED})$ corrections to the parton evolution. Although the quality of the fit is essentially unchanged, there are two important physical consequences. First, the different DGLAP evolution of u and d type quarks introduces isospin violation, i.e. $u^p \neq d^n$, which is found to be unambiguously in the direction to reduce the NuTeV $\sin^2\theta_W$ anomaly. A second consequence is the appearance of photon parton distributions $\gamma(x,Q^2)$ of the proton and the neutron. In principle these can be measured at HERA via the deep inelastic scattering processes $e N \to e\gamma X$; our predictions are in agreement with the present data.
Forward citations
Cited by 3 Pith papers
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Single inclusive hadron and jet production in lepton-hadron scattering
Single inclusive high-PT hadron and jet production in lepton-hadron scattering is factorized using a joint QCD+QED approach with universal lepton distribution functions, and predictions are given for JLab and EIC energies.
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Influence of Photon Inverse Emission on Forward-Backward Asymmetry in Dilepton Production at the LHC
Photon inverse emission contributes to forward-backward asymmetry in LHC dilepton production, quantified via numerical analysis and additive relative corrections in high-mass kinematic regions.
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Production of $W^+ W^-$ and $t \bar t$ pairs via photon-photon processes in proton-proton collisions
Review summarizing cross-section results for photon-photon production of WW and ttbar pairs in pp collisions with discussion of structure functions and rapidity gap survival.
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