Virtual Photons Shed Light on the Early Temperature of Dense QCD Matter - Archive ouverte HAL
Article Dans Une Revue Physical Review Letters Année : 2024

Virtual Photons Shed Light on the Early Temperature of Dense QCD Matter

Jessica Churchill
  • Fonction : Auteur
Lipei Du
  • Fonction : Auteur
Charles Gale
  • Fonction : Auteur
Sangyong Jeon
  • Fonction : Auteur

Résumé

Dileptons produced during heavy-ion collisions represent a unique probe of the QCD phase diagram, and convey information about the state of the strongly interacting system at the moment their preceding off-shell photon is created. In this study, we compute thermal dilepton yields from Au+Au collisions performed at different beam energies, employing a (3+1)-dimensional dynamic framework combined with emission rates accurate at next-to-leading order in perturbation theory and which include baryon chemical potential dependencies. By comparing the effective temperature extracted from the thermal dilepton invariant mass spectrum with the average temperature of the fluid, we offer a robust quantitative validation of dileptons as effective probe of the early quark-gluon plasma stage.

Dates et versions

hal-04308738 , version 1 (27-11-2023)

Identifiants

Citer

Jessica Churchill, Lipei Du, Charles Gale, Greg Jackson, Sangyong Jeon. Virtual Photons Shed Light on the Early Temperature of Dense QCD Matter. Physical Review Letters, 2024, 132 (17), pp.172301. ⟨10.1103/PhysRevLett.132.172301⟩. ⟨hal-04308738⟩
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