Volume 380 - Particles and Nuclei International Conference 2021 (PANIC2021) - QCD, spin physics and chiral dynamics
Exclusive Double Drell-Yan factorization and GTMDs
P.A. Gutiérrez García*, M.G. Echevarria and I. Scimemi
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Pre-published on: March 16, 2022
Published on: May 24, 2022
Abstract
The factorization of exclusive processes can give access to generalized transverse momentum-dependent distributions (GTMDs). We consider here the case of the differential cross-section for the exclusive process $\pi N\rightarrow N' \gamma^* \gamma^*\rightarrow p (\ell^+\ell^-)(\ell^+\ell^-)$. We provide a factorization theorem for this process studying the gauge links that are involved and providing an expression of the cross-section factorized in terms of two GTMDs and two light-cone wave functions. Furthermore, we show that the soft radiation has a structure very similar to the one found in single parton scattering. Finally, the cancellation of rapidity divergences is also studied.
DOI: https://doi.org/10.22323/1.380.0383
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