Is there a unique thermal source of dileptons in Pb(158 A·GeV) + Au, Pb reactions?

Abstract

An analysis of the dilepton measurements in the reactions Pb(158 A·GeV) + Au, Pb points to a unique thermal source contributing to the invariant mass and transverse momentum spectra. Effects of the flow pattern are discussed.

Statistical hadronization of charm at SPS, RHIC and LHC

“…1). However, the NA50 suggestion of charm enhancement is controversial, and other explanations exist of the observed enhancement in terms of thermal radiation [16,17]. We turn now to predictions for collider energies.…”

Vector mesons in medium and dileptons in heavy-ion collisions

“…At CERN-SpS energies (160-200 AGeV) this 'thermal' component is dominant over (or at least competitive with) final state hadron decays (at low M) and hard initial processes such as Drell-Yan annihilation (at high M) in the invariant mass range M ≃ 0.2-2 GeV. A consistent description of the measured data [24][25][26][27] is possible once hadronic many-body effects are included [20,28,29], cf. Figs.5 and 6.…”

Dileptons in high-energy heavy-ion collisions

“…[28,29]). In particular, an 'anomalous' open-charm enhancement (over the expectation from N -N collision scaling) is not required.…”