Baryon chemical potential dependency of the pseudo-critical temperature from $N_f = 2+1$ flavor lattice QCD

by Seyong Kim (Sejong University)

Wednesday May 7, 2025, 4:00 PM → 5:00 PM Asia/Seoul

CTPU Seminar room

In the QCD phase diagram, the dependence of the pseudo-critical temperature, Tpc, on the baryon chemical potential, μB, is of fundamental interest. The variation of Tpc with μB is normally captured by κ, the coefficient of the leading (quadratic) term of the polynomial expansion of Tpc with μB. In this work, we present the first calculation of κ using hadronic quantities. Simulating Nf = 2 + 1 flavours of Wilson fermions on Fastsum ensembles, we calculate the O(μ2B ) correction to mesonic correlation functions. By demanding degeneracy in the vector and axial vector channels we obtain Tpc(μB) and hence κ. While lacking a continuum extrapolation and being away from the physical point, our results are consistent with previous works using thermodynamic observables (renormalised chiral condensate, strange quark number susceptibility) from lattice QCD simulations with staggered fermions.