Pre-critical chiral fluctuations in nuclear medium — precursors of chiral restoration at ϱB ≠ 0 Original Research Article

It is shown that an enhancement in the spectral function near 2mπ threshold in the I=J=0 channel is a good signal of the partial restoration of chiral symmetry in nuclear medium. Several experiments are discussed to detect the enhancement, which uses hadron-nucleus and photo-nucleus reactions.