Experimental Overview of Direct Photon Results in Heavy Ion Collisions

Novitzky, N.

doi:10.1016/j.nuclphysbps.2016.05.013

Cited by 1 publication

(1 citation statement)

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“…The production of photons in heavy-ion collisions [57][58][59][60][61][62][63][64][65][66][67] looks a promising future tool for studying the cold nuclear matter effects [68,69], since photons are not accompanied by any final state interaction and hence leave the system with their energy and momenta unaltered. It has also been recognised as a powerful tool to study the fundamental properties of quark-gluon plasma (QGP) created in these collisions [70][71][72][73][74][75][76].…”

Section: Advances In High Energy Physicsmentioning

confidence: 99%

Predictions for the Isolated Prompt Photon Production at the LHC ats= 13 TeV

Goharipour

Mehraban

2017

Advances in High Energy Physics

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The prompt photon production in hadronic collisions has a long history of providing information on the substructure of hadrons and testing the perturbative techniques of QCD. Some valuable information about the parton densities in the nucleon and nuclei, especially of the gluon, can also be achieved by analysing the measurements of the prompt photon production cross section whether inclusively or in association with heavy quarks or jets. In this work, we present predictions for the inclusive isolated prompt photon production in pp collisions at center-of-mass energy of 13 TeV using various modern PDF sets. The calculations are presented as a function of both photon transverse energy and pseudorapidity for the ATLAS kinematic coverage. We also study in detail the theoretical uncertainty in the cross sections due to the variation of the renormalization, factorization, and fragmentation scales. Moreover, we introduce and calculate the ratios of photon momenta for different rapidity regions and study the impact of various input PDFs on such quantity.

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