SQUEEZED FERMIONS AND BACK-TO-BACK CORRELATIONS
P. K. Panda, T. Csörgő, Y. Hama, Gastão I. Krein, Sandra S. Padula · 2001
Back-to-back correlations of asymptotic fermion-anti-fermion pairs appear if in-medium interactions lead to mass modifications of fermion states in a thermalized medium. The back-to-back correlations of protons and anti-protons will be experimentally observable in ultrarelativistic heavy ion collisions. The strength of back-to-back correlations of fermions can be unlimitedly large, diverging as the momentum of the pair increases and the net baryon density decreases.