Diphoton production in high-energy p+A collisions
Abstract
We consider semi-inclusive diphoton+jet and inclusive diphoton production in high-energy proton-nucleus collisions, treating the target nucleus as a Color-Glass-Condensate and the projectile proton in the parton model. We obtain the prompt diphoton production cross-section in terms of fragmentation and direct contributions. The fragmentation part is given in terms of single-photon and double-photon fragmentation functions. We study prompt, direct and fragmentation diphoton correlations in p+p and p+A collisions at the LHC, and show that at low values of transverse momenta of the produced photon pair, these correlations are sensitive to saturation effects. We show that back-to-back (de)-correlations in prompt diphoton production are stronger in fragmentation part than in the direct one.
Keywords
Cite
@article{arxiv.1404.5632,
title = {Diphoton production in high-energy p+A collisions},
author = {Alex Kovner and Amir H. Rezaeian},
journal= {arXiv preprint arXiv:1404.5632},
year = {2014}
}
Comments
17 pages, 8 figures; v2: results unchanged, a clarifying footnote added. The version to appear in PRD