Dilepton production at next-to-leading order and intermediate invariant-mass observables

Abstract

The thermal QCD dilepton production rate is calculated at next-to-leading order in the strong coupling and at finite baryon chemical potential. The two-loop virtual photon self-energy is evaluated using finite temperature field theory and combined consistently with the self-energy in the Landau-Pomeranchuk-Migdal regime. We present new results for a dense baryonic plasma. The rates are then integrated using (3+1)-dimensional fluid-dynamical simulations calibrated to reproduce hadronic experimental results obtained at RHIC at energies ranging from those of the Beam Energy Scan to $\sqrt{s_{{}_{\mathrm{NN}}}}=200$ GeV. We elaborate on the ability for dileptons to relay information about the plasma baryonic content and temperature.

v1: 19 pages, 15 figures; v2: minor revision; v3: published version. Companion paper: Phys. Rev. Lett. 132, 172301 (2024) [arXiv:2311.06951]

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Cited by in corpus (9)

• The QCD phase diagram and Beam Energy Scan physics: a theory overview
• Virtual Photons Shed Light on the Early Temperature of Dense QCD Matter
• Lattice QCD estimates of thermal photon production from the QGP
• Bulk medium properties of heavy-ion collisions from the beam energy scan with a multistage hydrodynamic model
• Multimessenger study of baryon-charged QCD matter in heavy-ion collisions
• Thermal dilepton production within conformal viscous Gubser flow
• Efficient calculation of thermodynamic properties of baryon-rich QCD matter from heavy-ion transport models
• Finite-Density Dynamics of Chemically Equilibrating QGP in Conformal Gubser Flow and Hard Thermal Photon Production
• Dileptons at Colliders as Probes of the Quark-Gluon Plasma