Chiral mixing in dense matter

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概要

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.

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