Radial Flow from Electromagnetic Probes and Signal of Quark Gluon Plasma

Abstract

A first attempt has been made to extract the evolution of radial flow from the analysis of the experimental data on electromagnetic probes experimentally measured at SPS and RHIC energies. The $p_T$ spectra of photons and dileptons measured by WA98 and NA60 collaborations respectively at CERN-SPS and the photon spectra obtained by PHENIX collaboration at BNL-RHIC have been used to constrain the theoretical models, rendering the outcome of the analysis largely model independent. We argue that the variation of the radial velocity with invariant mass is indicative of a phase transition from initially produced partons to hadrons at SPS and RHIC energies.

One LaTeX and 9 eps files, to appear in Phys. Rev. C

References in corpus (13)

• Hydrodynamic Models for Heavy Ion Collisions
• Detailed measurement of the e+e- pair continuum in p+p and Au+Au collisions at sqrt(s_NN)=200 GeV and implications for direct photon production
• Electromagnetic radiation from nuclear collisions at RHIC energies
• QCD equation of state with 2+1 flavors of improved staggered quarks
• Evidence for radial flow of thermal dileptons in high-energy nuclear collisions
• Low Mass Dimuons Produced in Relativistic Nuclear Collisions
• Dimuon transverse momentum spectra as a tool to characterize the emission region in heavy-ion collisions
• Centrality-dependent direct photon pt spectra in Au+Au collisions at RHIC
• e+e- Pairs: a clock and a thermometer of heavy ion collisions
• Single photons from relativistic collision of lead nuclei at CERN SPS: A reanalysis
• Elliptic flow of thermal photons at midrapidity in Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV
• Measuring radial flow of partonic and hadronic phases in relativistic heavy ion collision
• Thermal photon to dilepton ratio in ultra-relativistic heavy ion collisions

Cited by in corpus (9)

• Pseudo-Critical Enhancement of Thermal Photons in Relativistic Heavy-Ion Collisions
• Elliptic flow of thermal dileptons as a probe of QCD matter
• Electromagnetic signals from Au+Au collisions at RHIC energy, $\sqrt{s_{NN}}$=200 GeV and Pb+Pb collisions at LHC energy, $\sqrt{s_{NN}}$=2.76 TeV
• Characterizing quark gluon plasma by dilepton interferometry
• Azimuthal distributions of radial momentum and velocity in relativistic heavy ion collisions
• Thermal photon production in Au+Au collisions: viscous corrections in two different hydrodynamic formalisms
• Probing collectivity in ultra-relativistic heavy ion collision by leptons and photons
• Heavy lepton pair production in nucleus-nucleus collisions at LHC energy - a case study
• Two Photon Correlation in Anisotropic Quark-gluon plasma (aQGP)