Aug 8 – 13, 2022
Hörsaalzentrum Poppelsdorf
Europe/Berlin timezone

Progress on the QCD Deconfinement Critical Point for $N_\text{f}=2$ Staggered Fermions

Aug 9, 2022, 2:40 PM
20m
CP1-HSZ/Ground-0.011 - HS1 (CP1-HSZ)

CP1-HSZ/Ground-0.011 - HS1

CP1-HSZ

450
Oral Presentation QCD at Non-zero Temperature Non-zero Temperature

Speaker

Reinhold Kaiser

Description

The global center symmetry of quenched QCD at zero baryonic chemical potential is broken spontaneously at a critical temperature $T_c$ leading to a first-order phase transition. Including heavy dynamical quarks breaks the center symmetry explicitly and weakens the first-order phase transition for decreasing quark masses until it turns into a smooth crossover at a $Z_2$-critical point. We investigate the $Z_2$-critical quark mass value towards the continuum limit for $N_\text{f}=2$ flavors using lattice QCD in the staggered formulation. As part of a continued study, we present results from Monte-Carlo simulations on $N_\tau=8, 10$ lattices. Several aspect ratios and quark mass values were simulated in order to obtain the critical mass from a fit of the Polyakov loop to a kurtosis finite size scaling formula. Moreover, the possibility to develop a Ginzburg-Landau effective theory around the $Z_2$-critical point is explored. The coefficients of the Landau functional can be determined from fits of the Polyakov loop to the data as a function of the bare parameters.

Primary authors

Owe Philipsen (Goethe-University Frankfurt) Reinhold Kaiser

Presentation materials