2008/11/03 by B. Pire, L. Szymanowski, J. Wagner · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevd.79.014010
published as Phys.Rev.D79:014010,2009 · 9 pages, 10 figures
arxiv created 2008/11/03 · openalex publication_date 2009/01/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Exclusive photoproduction of dileptons, \ensuremathγN\ensuremath→\ensuremathℓ+\ensuremathℓ^\ensuremath-N, is and will be measured in ultraperipheral collisions at hadron colliders, such as the Tevatron, Relativistic Heavy Ion Collider, and the LHC. We demonstrate that the timelike deeply virtual Compton scattering mechanism \ensuremathγq\ensuremath→\ensuremathℓ+\ensuremathℓ^\ensuremath-q where the lepton pair comes from the subprocess \ensuremathγq\ensuremath→\ensuremathγ*q dominates in some accessible kinematical regions, thus opening a new way to study generalized parton distributions in the nucleon. High energy kinematics enables one to probe parton distributions at small skewedness. This subprocess interferes at the amplitude level with the pure QED subprocess \ensuremathγ\ensuremathγ*\ensuremath→\ensuremathℓ+\ensuremathℓ^\ensuremath- where the virtual photon is radiated from the nucleon.