Constraints on the two-flavor QCD phase diagram from imaginary chemical potential

TL;DR

This paper reviews constraints on the two-flavor QCD phase diagram using imaginary chemical potential, focusing on tricritical lines and their scaling, and presents initial results on finite-temperature behavior in the chiral limit.

Contribution

It introduces new constraints on the two-flavor QCD phase diagram derived from imaginary chemical potential analysis and reports initial findings on finite-temperature effects in the chiral limit.

Findings

Identification of tricritical lines at imaginary chemical potential.

Scaling behavior near tricritical points.

Initial results on finite-temperature behavior in the two-flavor chiral limit.

Abstract

We review our knowledge of the phase diagram of QCD as a function of temperature, chemical potential and quark masses. The presence of tricritical lines at imaginary chemical potential mu=i pi/3 T, with known scaling behaviour in their vicinity, puts constraints on this phase diagram, especially in the case of two light flavors. We show first results in our project to determine the finite-temperature behaviour in the two-flavour chiral limit.