Phenomenology of collinear photon emission from quark-gluon plasma in $AA$ collisions

Abstract

We study the role of running coupling and the effect of variation of the thermal quark mass on contribution of the collinear bremsstrahlung and annihilation to photon emission in $AA$ collisions in a scheme similar to that used in our previous jet quenching analyses. We find that for a scenario with the thermal quark mass $m_q\sim 50-100$ MeV contribution of the higher order collinear processes summed with the $2\to 2$ processes can explain a considerable part ($\sim 50$\%) of the experimental photon spectrum at $k_T\sim 2-3$ GeV for Au+Au collisions at $\sqrt{s}=0.2$ TeV. But for $m_q=300$ MeV and for the thermal quark mass predicted by the HTL scheme the theoretical predictions underestimate considerably the experimental spectrum.

arXiv comment6 pages, 2 figures

References in corpus (43)

• Radiative energy loss and $p_{\perp }$-broadening of high energy partons in nuclei
• Radiative energy loss of high energy quarks and gluons in a finite volume quark-gluon plasma
• The QCD equation of state with dynamical quarks
• Fully quantum treatment of the Landau--Pomeranchuk--Migdal effect in QED and QCD
• Multiple Collisions and Induced Gluon Bremsstrahlung in QCD
• Hadron production in nuclear collisions at RHIC and high density QCD
• Radiative energy loss of high energy quarks in finite-size nuclear matter and quark-gluon plasma
• Photon Emission from Quark-Gluon Plasma: Complete Leading Order Results
• Static quark anti-quark interactions in zero and finite temperature QCD. I. Heavy quark free energies, running coupling and quarkonium binding
• The production of photons in relativistic heavy-ion collisions
• Hadronic Production of Thermal Photons
• Massive gluons and quarks and the equation of state obtained from SU(3) lattice QCD
• A perturbative framework for jet quenching
• Bose--Einstein Condensation and Thermalization of the Quark Gluon Plasma
• Conformal anomaly as a source of soft photons in heavy ion collisions
• A simple sum rule for the thermal gluon spectral function and applications
• On the Energy Loss of High Energy Quarks in a Finite-Size Quark-Gluon Plasma
• Azimuthal jet flavor tomography with CUJET2.0 of nuclear collisions at RHIC and LHC
• Electromagnetic response of quark-gluon plasma in heavy-ion collisions
• Transverse Spectra of Radiation Processes in Medium
• Parton energy loss in an expanding quark-gluon plasma: Radiative vs collisional
• Magnetic Screening in Hot Non-Abelian Gauge Theory
• Parametric estimate of the relative photon yields from the Glasma and the Quark-Gluon Plasma in heavy-ion collisions
• KLN theorem, magnetic mass, and thermal photon production
• Induced photon emission from quark jets in ultrarelativistic heavy-ion collisions
• Production of Photons and Dileptons in the Glasma
• Landau-Pomeranchuk-Migdal effect for finite-size targets
• Jet quenching with running coupling including radiative and collisional energy losses
• Energy dependence of the saturation scale and the charged multiplicity in pp and AA collisions
• On the role of magnetic field in photon excess in heavy ion collisions
• The quark-gluon medium
• Effect of magnetic field on the photon radiation from quark-gluon plasma in heavy ion collisions
• Parton energy loss in the mini quark-gluon plasma and jet quenching in proton-proton collisions
• Variation of jet quenching from RHIC to LHC and thermal suppression of QCD coupling constant
• Nuclear modification factor for light and heavy flavors within pQCD and recent data from the LHC
• Towards azimuthal anisotropy of direct photons
• Nuclear suppression of light hadrons and single electrons at RHIC and LHC
• Vanishing Thermal Mass in the Strongly Coupled QCD/QED medium
• Multiplicity density at mid-rapidity in $AA$ collisions: effect of meson cloud
• Thermal mass and dispersion relations of quarks in the deconfined phase of quenched QCD
• Collinear Photon Emission from the Quark-Gluon Plasma: The Light-Cone Path Integral Formulation
• Structure of a thermal quasifermion in the QCD/QED Medium
• Parton energy loss in glasma

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