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Lepton Pair Production Through Two Photon Process in Heavy Ion Collisions

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arxiv 2003.02947 v2 pith:3YB3PNWL submitted 2020-03-05 hep-ph hep-exnucl-exnucl-th

Lepton Pair Production Through Two Photon Process in Heavy Ion Collisions

classification hep-ph hep-exnucl-exnucl-th
keywords collisionsphotonmomentumtransversecontributionsheavyleptonproduction
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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This paper investigates the electromagnetic production of lepton pairs with low transverse momentum in relativistic heavy ion collisions. We estimate the initial photons' transverse momentum contributions by employing models where the average transverse momentum squared of the incoming photon can be calculated in the equivalent photon approximation. We further derive an all order QED resummation for the soft photon radiation, which gives an excellent description of the ATLAS data in ultra-peripheral collisions at the LHC. For peripheral and central collisions, additional $p_T$-broadening effects from multiple interaction with the medium and the magnetic field contributions from the quark-gluon plasma are also discussed.

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Cited by 3 Pith papers

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    All-order resummation of soft gluons for transverse energy-energy correlators in diffractive dijet production demonstrates sensitivity of acoplanarity to diffractive TMDs.

  2. Probing Saturation Effect in Heavy Meson Pair Correlation in Forward $pA$ Collisions

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    Heavy meson pair correlations in forward pA collisions are computed in the CGC framework with Sudakov resummation, reproducing LHCb data and showing a mass hierarchy in R_pA that strengthens at higher rapidity.

  3. Exclusive dimuon production and coherent charmonium photoproduction at forward rapidity in ultra-peripheral Pb$-$Pb collisions at $\mathbf{\sqrt{s_{\rm NN}}=5.36}$ TeV

    nucl-ex 2026-05 unverdicted novelty 4.0

    ALICE reports new rapidity-differential cross sections for coherent J/ψ and ψ(2S) photoproduction and exclusive dimuons in forward rapidity UPC Pb-Pb collisions at 5.36 TeV, showing nuclear shadowing ratios of approxi...