Elliptic flow of thermal dileptons as a probe of QCD matter

Abstract

We study the variation of elliptic flow of thermal dileptons with transverse momentum and invariant mass of the pairs for Pb+Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV. The dilepton productions from quark gluon plasma (QGP) and hot hadrons have been considered including the spectral change of light vector mesons in the thermal bath. The space time evolution has been carried out within the frame work of 2+1 dimensional ideal hydrodynamics with lattice+hadron resonance gas equation of state. We find that a judicious selection of invariant mass(M) and transverse momentum (p_T) windows can be used to extract the collective properties of quark matter, hadronic matter and also get a distinct signature of medium effects on vector mesons. Our results indicate a reduction of elliptic flow (v_2) for M beyond phi mass, which if observed experimentally would give the measure of v_2 of the partonic phase.

To appear in Phys. Rev. C (Rapid Comm.)

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Cited by in corpus (10)

• Challenges in QCD matter physics - The Compressed Baryonic Matter experiment at FAIR
• Pseudo-Critical Enhancement of Thermal Photons in Relativistic Heavy-Ion Collisions
• Dilepton emission in high-energy heavy-ion collisions with viscous hydrodynamics
• Universal Parametrization of Thermal Photon Rates in Hadronic Matter
• Thermal photon emission from the pi-rho-omega system
• Electrical conductivity of hadronic matter from different possible mesonic and baryonic thermal fluctuations
• Effect of spectral modification of $\rho$ on shear viscosity of a pion gas
• Benchmarking a Non-Equilibrium Approach to Photon Emission in Relativistic Heavy-Ion Collisions
• Decoding the flow evolution in Au+Au reactions at $1.23A$ GeV using hadron flow correlations and dileptons
• Elliptic flow of thermal dileptons in event-by-event hydrodynamic simulation