Elliptic flow from thermal photons with magnetic field in holography

Abstract

We compute the elliptic flow $v_2$ of thermal photons in a strongly coupled plasma with constant magnetic field via gauge/gravity duality. The D3/D7 embedding is applied to generate the contributions from massive quarks. By considering the cases in 2+1 flavor SYM analogous to the photon production in QGP, we obtain the thermal-photon $v_2$, which is qualitatively consistent with the direct-photon $v_2$ measured in RHIC at intermediate energy. However, due to the simplified setup, the thermal-photon $v_2$ in our model should be regarded as the upper bound for the $v_2$ generated by solely magnetic field in the strongly coupled scenario.

7 pages, 6 figures, paragraphs extended, journal version accepted by Physical Review D

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• Holographic Phase Transitions with Fundamental Matter
• Photon and dilepton production in supersymmetric Yang-Mills plasma
• Time and space dependence of electromagnetic field in relativistic heavy-ion collisions
• Comparing the drag force on heavy quarks in N=4 super-Yang-Mills theory and QCD
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• Photon decay in strong magnetic field in heavy-ion collisions
• Photoemission with Chemical Potential from QCD Gravity Dual
• Bright branes for strongly coupled plasmas
• Thermal photon production in a strongly coupled anisotropic plasma
• Prediction of a Photon Peak in Heavy Ion Collisions

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• Benchmarking a Non-Equilibrium Approach to Photon Emission in Relativistic Heavy-Ion Collisions
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• Shear Viscosities of Photons in Strongly Coupled Plasmas
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• Direct-Photon Spectra and Anisotropic Flow in Heavy Ion Collisions from Holography
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• QGP formation time and the large photon v2 puzzle in heavy ion collisions
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