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Volume 316 - XXVI International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2018) - WG2: Small-x and Diffraction
Exploring gluon saturation with photons in high energy hadron-hadron collisions
S. Benic,* K. Fukushima, O. Garcia Montero, R. Venugopalan
*corresponding author
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Pre-published on: 2018 September 20
Published on: 2018 November 23
We numerically compute the inclusive photon production in ${\rm p}+{\rm p}$ collisions within the Color Glass Condensate framework as determined through the valence $qg\to q\gamma$ leading-order channel and the $gg \to q\bar{q}\gamma$ next-to-leading-order channel, respectively. We find the $gg\to q\bar{q}\gamma$ channel accounts for more than $90\%$ of the cross section at the center of mass energies of $\sqrt{s} = 7$ TeV and $13$ TeV. The obtained numerical results compare well with the ATLAS and CMS ${\rm p}+{\rm p}$ data for inclusive isolated photon production within the region where $x < 0.01$ in either of the colliding protons.
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