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arXiv · 2003.06352

Momentum Anisotropy of Leptons from Two Photon Processes in Heavy Ion Collisions

Bo-Wen Xiao·Feng Yuan·Jian Zhou
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Abstract

We investigate the azimuthal angular correlation between the lepton transverse momentum $P_\perp$ and the impact parameter $b_\perp$ in non-central heavy-ion collisions, where the leptons are produced through two-photon scattering. Among the Fourier harmonic coefficients, a significant $v_4$ asymmetry is found for the typical kinematics at RHIC and LHC with a mild dependence on the $P_\perp$, whereas $v_2$ is power suppressed by the lepton mass over $P_\perp$. This unique prediction, if confirmed from the experiments, shall provide crucial information on the production mechanism for the dilepton in two-photon processes.

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Bo-Wen Xiao, Feng Yuan, Jian Zhou. 2020-03-13. Momentum Anisotropy of Leptons from Two Photon Processes in Heavy Ion Collisions. https://doi.org/10.1103/physrevlett.125.232301

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