Spin-dependent Pomeron and Odderon in elastic proton-proton scattering
Abstract
We introduce a new model of near-forward elastic proton-(anti)proton scattering at high energy based on the modern formulation of Pomeron and Odderon in terms of Wilson lines and generalized TMDs (GTMDs). We compute the helicity-dependent elastic amplitudes φ1,2,3,4,5 in this model and study their energy dependence from the nonlinear small-x evolution equations. While both Pomeron and Odderon contribute to helicity-flip processes in general, in the forward limit t=0 only the double helicity-flip amplitude φ2, dominated by the spin-dependent Odderon, survives. This may affect the extraction of the parameter as well as the total cross section in the LHC energy domain and beyond.
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