Signatures of chiral symmetry restoration in dilepton production

by Chihiro Sasaki (IFT Wroclaw, Poland)


We study the structural change of the vector spectral function and integrated

production rates of dileptons in the presence of the chiral mixing induced


at finite density. The mixing produces multiple bumps and peaks around the


masses of the $\rho, \omega$ and $\phi$ resonances in the spectral function.

The arising modification becomes pronounced when the mass difference between

parity partners decreases. In particular, the emergent enhancement around the

vacuum $\phi$ meson in the production rates serves as an excellent signature

of the partially-restored chiral symmetry in heavy-ion collisions.