Nuclear shadowing and prompt photons at relativistic hadron colliders

Abstract

The production of prompt photons at high energies provides a direct probe of the dynamics of the strong interactions. In particular, one expect that it could be used to constrain the behavior of the nuclear gluon distribution in $pA$ and $AA$ collisions. In this letter we investigate the influence of nuclear effects in the production of prompt photons and estimate the transverse momentum dependence of the nuclear ratios $R_{pA}=\frac{d\sigma (pA)}{dy{d}^2{p}_T}/A\frac{d\sigma (pp)}{dy{d}^2{p}_T}$ and $R_{AA}=\frac{d\sigma (AA)}{dy{d}^2{p}_T}/A^2\frac{d\sigma (pp)}{dy{d}^2{p}_T}$ at RHIC and LHC energies. We demonstrate that the study of these observables can be useful to determine the magnitude of the shadowing and antishadowing effects in the nuclear gluon distribution.

4 pages, 3 figures. Version to be published in PRC

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Cited by in corpus (11)

• Global Analysis of Nuclear Parton Distributions
• Nuclear PDFs After the First Decade of LHC Data
• Centrality dependence of inclusive prompt photon production in d+Au, Au+Au, p+Pb, and Pb+Pb collisions
• Investigating the high energy QCD approaches for prompt photon production at the LHC
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• Predictions for the isolated prompt photon production at the LHC at $\sqrt{s}=$13 TeV
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• Isolated photon production in $pp$ collisions at forward rapidities and high multiplicity events
• Quarkonium plus prompt-photon associated hadroproduction and nuclear shadowing
• Gluino production in ultrarelativistic heavy ion collisions and nuclear shadowing