The color dipole picture for prompt photon production in $pp$ and $pPb$ collisions at the CERN-LHC

Abstract

A study on the prompt photon production within the QCD color dipole picture with emphasis in $pp$ and $pA$ collisions at the LHC energy regimes is performed. We present predictions for the differential cross section as a function of photon transverse momentum at different rapidity bins considering updated phenomenological color dipole models, which take into account the QCD gluon saturation physics. The results are directly compared to the recent experimental measurements provided by CMS and ATLAS Collaborations, showing a reasonable agreement in all rapidity bins with no free parameters. Special attention is given to the IPSAT model given its good description of the data in all rapidity bins from low- to high-$p_T$ ranges. As a result, a free-parameter approach has succeeded in describing the LHC data for prompt photon production, while new predictions for the 13-TeV data is presented in view of new data to confirm such prospect.

arXiv comment12 pages, 18 figures

References in corpus (47)

• An Impact Parameter Dipole Saturation Model
• EPPS16: Nuclear parton distributions with LHC data
• Isolated photons in perturbative QCD
• Analysis of combined HERA data in the Impact-Parameter dependent Saturation model
• Cross section of isolated prompt photons in hadron-hadron collisions
• Relating high-energy lepton-hadron, proton-nucleus and nucleus-nucleus collisions through geometric scaling
• Bremsstrahlung of a Quark Propagating through a Nucleus
• Phenomenological Review on Quark-Gluon Plasma: Concepts vs. Observations
• Quantitative constraints on the gluon distribution function in the proton from collider isolated-photon data
• Measurement of the inclusive isolated prompt photon cross-section in pp collisions at sqrt(s)= 7 TeV using 35 pb-1 of ATLAS data
• Measurement of the Differential Cross Section for Isolated Prompt Photon Production in pp Collisions at 7 TeV
• Prompt photon production and photon-hadron correlations at RHIC and the LHC from the Color Glass Condensate
• Measurement of the inclusive isolated prompt photon cross section in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector using 4.6 fb-1
• Off-diagonal parton distributions and their evolution
• Nuclear effects in the Drell-Yan process at very high energies
• Saturation model of DIS : an update
• Saturation physics at HERA and RHIC: An unified description
• The color dipole picture of the Drell-Yan process
• Probing gluon saturation with next-to-leading order photon production at central rapidities in proton-nucleus collisions
• Geometric Scaling at RHIC and LHC
• Azimuthal anisotropy of direct photons
• Diffractive dijet production in impact parameter dependent saturation models
• Inclusive prompt photon production in nuclear collisions at RHIC and LHC
• Parton model versus color dipole formulation of the Drell-Yan process
• Direct photons and dileptons via color dipoles
• Constraining unintegrated gluon distributions from inclusive photon production in proton-proton collisions at the LHC
• Measurement of the differential cross sections for isolated direct photon pair production in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV
• Inclusive prompt photon production in electron-nucleus scattering at small x
• Direct photon production and PDF fits reloaded
• Geometrical Scaling of Direct-Photon Production in Hadron Collisions from RHIC to the LHC
• Measuring gluon shadowing with prompt photons at RHIC and LHC
• Hadrons and direct photon in pp and pA collisions at LHC and saturation effects
• Isolated photon production in proton-nucleus collisions at forward rapidity
• Deeply Virtual Compton Scattering and Saturation Approach
• Direct photons at forward rapidities in high-energy pp collisions
• Centrality dependence of inclusive prompt photon production in d+Au, Au+Au, p+Pb, and Pb+Pb collisions
• Prompt photon - jet angular correlations at central rapidities in p+A collisions
• Photon-jet ridge at RHIC and the LHC
• Properties of Thermal Photons at RHIC and LHC
• Di-photon "Ridge" in p+p and p+A collisions at RHIC and the LHC
• Diphoton production in high-energy p+A collisions
• Investigating the Drell-Yan transverse momentum distribution in the color dipole approach
• Investigating the high energy QCD approaches for prompt photon production at the LHC
• Parton saturation scaling function for exclusive production of vector mesons and Deeply Virtual Compton Scattering
• Investigating F_L(x,Q2) at fixed energy in the color dipole formalism
• Probing nuclear modifications of parton distribution functions through the isolated prompt photon production at the LHC
• Geometrical scaling of prompt photons in heavy ion collisions

Cited by in corpus (6)

• Prompt photon production in proton collisions as a probe of parton scattering in high energy limit
• TMD parton showers for associated $\gamma$+jet production in electron-proton collisions at high energies
• Prompt photon production in high-energy $pA$ collisions at forward rapidity
• An energy independent scaling of transverse momentum spectra of direct (prompt) photons from two-body processes in high-energy proton-proton collisions
• $D$-meson production in high energy $pA$ collisions within the QCD color dipole transverse momentum representation
• Isolated photon production in $pp$ collisions at forward rapidities and high multiplicity events