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

Xiao, Bo-Wen; Yuan, Feng; Zhou, Jian

doi:10.1103/PhysRevLett.125.232301

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

Journal Article · Tue Dec 01 00:00:00 EST 2020 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.125.232301· OSTI ID:1778461

; Yuan, Feng; Zhou, Jian

We investigate the azimuthal angular correlation between the lepton transverse momentum P⊥ and the impact parameter b⊥ in noncentral heavy-ion collisions, where the leptons are produced through two-photon scattering. Among the Fourier harmonic coefficients, a significant v₄ asymmetry is found for the typical kinematics at RHIC and LHC with a mild dependence on the P⊥, whereas v₂ is power suppressed by the lepton mass over P⊥. 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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Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF)

Grant/Contract Number:: AC02-05CH11231; 11675093; 11575070

OSTI ID:: 1778461

Alternate ID(s):: OSTI ID: 1762213

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Vol. 125 Journal Issue: 23; ISSN 0031-9007

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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