Anisotropy of photon production: Initial eccentricity or magnetic field
arXiv:1208.5502 · doi:10.1103/PhysRevLett.110.192301
Abstract
Recent measurements of the azimuthal anisotropy of direct photons in heavy-ion collisions at the energies of RHIC show that it is of the same order as the hadronic one. This finding appears to contradict the expected dominance of photon production from a quark-gluon plasma at an early stage of a heavy-ion collision. A possible explanation of the strong azimuthal anisotropy of the photons, given recently, is based on the presence of a large magnetic field in the early phase of a collision. In this letter, we propose a method to experimentally measure the degree to which a magnetic field in heavy-ion collisions is responsible for the observed anisotropy of photon production. The experimental test proposed in this letter may potentially change our understanding of the non-equilibrium stage and possible thermalization in heavy-ion collisions.
4 pages, 3 figures; version accepted for publication: discussions extended, MC calculations added
References in corpus (7)
- The Chiral Magnetic Effect
- Event-by-event gluon multiplicity, energy density and eccentricities at RHIC and LHC
- Conformal anomaly as a source of soft photons in heavy ion collisions
- Testing the Chiral Magnetic Effect with Central U+U collisions
- Electromagnetic radiation by quark-gluon plasma in magnetic field
- Wess-Zumino-Witten action and photons from the Chiral Magnetic Effect
- Elliptic flow of thermal dileptons in relativistic nuclear collisions
Cited by in corpus (51)
- Comments About the Electromagnetic Field in Heavy-Ion Collisions
- Effective QCD and transport description of dilepton and photon production in heavy-ion collisions and elementary processes
- Production and Elliptic Flow of Dileptons and Photons in the semi-Quark Gluon Plasma
- QGP formation time and direct photons from heavy ion collisions
- Centrality dependence of the direct photon yield and elliptic flow in heavy-ion collisions at sqrt(s)=200 GeV
- Hadronic and partonic sources of direct photons in relativistic heavy-ion collisions
- Electromagnetic spectral properties and Debye screening of a strongly magnetized hot medium
- Direct real photons in relativistic heavy ion collisions
- Elliptic flow from thermal photons with magnetic field in holography
- Thermal photon with slow quark chemical equilibration
- Chiral Hall Effect and Chiral Electric Waves
- Enhanced thermal photon and dilepton production in strongly coupled N=4 SYM plasma in strong magnetic field
- Photon elliptic flow in relativistic heavy-ion collisions: hadronic versus partonic sources
- Universal Parametrization of Thermal Photon Rates in Hadronic Matter
- Holographic Chiral Electric Separation Effect
- Holographic Photon Production with Magnetic Field in Anisotropic Plasmas
- Pressure of a weakly magnetized hot and dense deconfined QCD matter in one-loop hard-thermal-loop perturbation theory
- Inverse magnetic catalysis -- how much do we know about?
- Flows and polarization of early photons with magnetic field at strong coupling
- General structure of gauge boson propagator and its spectra in a hot magnetized medium
- Dilepton and photon production in the presence of a nontrivial Polyakov loop
- Holographic Photon Production in Heavy Ion Collisions
- A Tale of Tails: Photon Rates and Flow in Ultra-Relativistic Heavy Ion Collisions
- Thermal photon emission from the pi-rho-omega system
- Effect of magnetic field on dilepton production in a hot plasma
- Erratum: Anisotropy in the EoS of Magnetized Quark Matter [Phys Rev C91, 065205 (2015)]
- Benchmarking a Non-Equilibrium Approach to Photon Emission in Relativistic Heavy-Ion Collisions
- Thermo-magnetic spectral properties of neutral mesons in vector and axial-vector channels using NJL model
- Rho meson decay in presence of magnetic field
- Towards azimuthal anisotropy of direct photons
- Spectral function and dilepton rate from a strongly magnetised hot and dense medium in the light of mean field models
- Soft contribution to the damping rate of a hard photon in a weakly magnetized hot medium
- General structure of the neutral meson self-energy and its spectral properties in a hot and dense magnetized medium
- Spin Polarized Photons and Di-leptons from Axially Charged Plasma
- Heavy quark dynamics in a strongly magnetized quark-gluon plasma
- Second-order quark number susceptibility of deconfined QCD matter in the presence of a magnetic field
- Chiral susceptibility in dense thermo-magnetic QCD medium within HTL approximation
- Chiral symmetry breaking and confinement effects on dilepton and photon production around
- Effect of an electromagnetic field on the spectra and elliptic flow of particles
- Effective distributions of quasi-particles for thermal photons
- Effect of the magnetized medium on the decay of neutral scalar bosons
- Direct Photons in Hydrodynamic Modeling of Relativistic Nuclear Collisions
- Photon and dilepton production in high energy heavy ion collisions
- Photons production in heavy-ion collisions as a signal of deconfinement phase
- Probing confinement by direct photons and dileptons
- Medium separation scheme effects on the magnetized and cold two-flavor superconducting quark matter
- Anisotropy of thermal dileptons
- Thermal Field Theory in the Presence of a Background Magnetic Field and its Application to QCD
- Dynamics of strongly interacting parton-hadron matter
- Hydrodynamic model of heavy-ion collisions with low momentum components
- Shear Viscosity of hadronic matter at finite temperature and magnetic field