Finite baryon density induces a direct mixing between vector and
axial-vector states,
which yields multiple bumps and peaks around the vacuum masses of the
rho, omega and
phi resonances in the spectral function. The modification become
significantly pronounced
when the mass difference between the parity partners decreases at high
density. We
propose that the emergent enhancement in the dilepton production rates
serves as an
excellent signature of the partially-restored chiral symmetry to be
verified in heavy-ion
collisions.
The seminar will be held in English. Everyone can join the seminar
freely. We look forward to your participation.