Bremsstrahlung dileptons in ultrarelativistic heavy ion collisions

Jalilian-Marian, J.; Koch, Volker

doi:10.1103/physrevc.58.3763

Cited by 1 publication

(1 citation statement)

References 18 publications

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“…Before the nuclear surfaces actually touch dileptons are produced through coherent Bremsstrahlung [13] in the decelerating Coulomb field of the approaching nuclei. Their contribution seems to be negligible as compared to subsequent sources [14]. Within the first 1 fm/c or so of the nuclear overlap, the excited hadronic system is far from thermal equilibrium and the corresponding 'pre-equilibrium' dilepton radiation mostly consists of hard processes such as Drell-Yan annihilation leaving its trace mainly at large invariant masses M ll ∼ > 3 GeV.…”

Section: Introductionmentioning

confidence: 99%

Chiral Symmetry Restoration and Dileptons in Relativistic Heavy-Ion Collisions

Rapp

Wambach

2002

Advances in Nuclear Physics

545

258

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The current theoretical status in the analysis and interpretation of low-mass dilepton measurements in (ultra-) relativistic heavy-ion experiments is reviewed. Special emphasis is put on potential signals of (partial) restoration of dynamically broken chiral symmetry in a hot and dense hadronic medium. It follows from chiral symmetry alone that parity partners of hadronic correlation functions must become identical when the symmetry is restored. The assessment of medium effects in the vector channel, which governs the dilepton production, thus necessitates a simultaneous treatment of the vector and axialvector degrees of freedom. While significant progress in this respect has been made some open questions remain in establishing a rigorous link in the mass region below 1 GeV. From the present calculations a suggestive 'quark-hadron duality' emerges near the phase boundary. It implies substantial medium effects in the dilepton signal from the hadronic phase which smoothly matches a perturbative description within the plasma phase.

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Section: Introductionmentioning

confidence: 99%