Helicity structure functions in Drell-Yan are analyzed in the Parton Reggeization Approach with gauge-invariant inclusion of initial-state transverse momentum, clarifying relations to the TMD Parton Model.
A proof of the reggeized form of amplitudes with quark exchanges
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abstract
A complete proof of the quark Reggeization hypothesis in the leading logarithmic approximation for any quark--gluon inelastic process in the multi--Regge kinematics in all orders of $\alpha_s$ is given. First, we show that the multi--Regge form of QCD amplitudes is guarantied if a set of conditions on the Reggeon vertices and the trajectories is fulfilled. Then, we examine these conditions and show that they are satisfied.
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hep-ph 1years
2019 1verdicts
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Off-shell initial state effects and gauge invariance in the Drell-Yan process
Helicity structure functions in Drell-Yan are analyzed in the Parton Reggeization Approach with gauge-invariant inclusion of initial-state transverse momentum, clarifying relations to the TMD Parton Model.