[RIKEN Lunch Seminar] Modification of the nucleon-nucleon potential and nuclear correlations due to the QCD critical point

by Dr Juan M Torres-Rincon (Stony Brook University)

Thursday 7 Feb 2019, 12:00 → 13:00 US/Eastern

2-160 (Bldg 510)

The scalar-isoscalar mode of QCD becomes lighter/nearly massless close to the chiral transition/second-order critical point. This mode is the main responsible for the attractive part of the nucleon-nucleon potential at distances of 1-2 fm. Therefore, a long-range strong attraction among nucleons is predicted to develop close to the QCD critical point. Using the Walecka-Serot model for the NN potential we study the effects of the critical mode in a system of nucleons and mesons using a Molecular Dynamics+Langevin equations for the freeze-out conditions of heavy-ion collisions. Beyond mean field, we observe strong nucleon correlations leading to baryon clustering. We propose that light-nuclei formation, together with an enhancement of cumulants of the proton distribution can signal the presence of the QCD critical point.