Dilepton radiation from strongly interacting systems

The Compressed Baryonic Matter (CBM) Experiment at FAIR – Physics, Status and Prospects

“…It is expected that non-monotonous behaviour in the variation of the fireball temperature as a function of the collision energy -'Caloric Curve' potentially signals a first-order phase transition (see figure 5). Therefore, dileptons are a crucial tool to understand the nature of a quark-hadron phase transition (detailed review in [33]). The NA60 experiment at SPS used dimuons (μ + μ − ) to extract a mean fireball temperature of T slope = 205 ± 12 MeV in In-In collisions at s NN = 17.3 GeV [34].…”

The exploration of hot and dense nuclear matter: introduction to relativistic heavy-ion physics

“…There are two main physics questions that can be addressed with dilepton and photon measurements. By investigating the invariant mass spectrum of dileptons emitted from vector mesons one can get insight about the properties of the spectral functions of resonances in the medium (see [346] for a recent review). The ρ-meson is of special interest, since the idea is to study chiral symmetry restoration by observing the spectral functions of the ρ and its chiral partner a 1 become degenerate.…”

Electromagnetic Probes: Theory and Experiment

“…Electromagnetic (EM) probes, i.e. photons and dileptons, have proven to be exceptionally versatile and useful probes to study the properties of the hot and dense medium created in such collisions, see for example [6,7,8,9,10] for reviews. This is due to the fact that they don't (directly) interact 'strongly' with the surrounding medium, i.e.…”