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arXiv · 1407.8329

Thermal photon $v_3$ at LHC from fluctuating initial conditions

Rupa Chatterjee·Dinesh K. Srivastava·Thorsten Renk
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Abstract

We calculate the triangular flow parameter $v_3$ of thermal photons for 0--40\% central collisions of Pb nuclei at LHC using an event-by-event hydrodynamic model with fluctuating initial conditions. Thermal photon $v_3$ with respect to the the participant plane angle is found to be positive and significant compared to the elliptic flow parameter $v_2$ of thermal photons. In addition, photon $v_3$ as a function of $p_T$ shows similar qualitative nature to photon $v_2$ in the region $1< p_T <6$ GeV/$c$. We argue that while $v_3$ originates from $ε_3$ deformations of the initial state density distribution, fast buildup of radial flow due to fluctuations is the main driving mechanism for the observed large value.

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Rupa Chatterjee, Dinesh K. Srivastava, Thorsten Renk. 2014-07-31. Thermal photon $v_3$ at LHC from fluctuating initial conditions. https://doi.org/10.1016/j.nuclphysa.2014.08.012

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