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Zha, W.; Ruan, L.; Tang, Z.; Xu, Z.; Yang, S.
Physics letters. B, 06/2018, Volume: 781, Issue: CJournal Article
Recently, significant enhancements of e+e− pair production at very low transverse momentum (pT<0.15 GeV/c) were observed by the STAR collaboration in peripheral hadronic A+A collisions. This excesses can not be described by the QGP thermal radiation and ρ in-medium broadening calculations. This is a sign of coherent photon–photon interactions, which were conventionally studied only in ultra-peripheral collisions. In this article, we present calculations of lepton pair (e+e− and μ+μ−) production from coherent photon–photon interactions in hadronic A+A collisions at RHIC and LHC energies within the STAR and ALICE acceptance.
