Quark Matter 2025

Critical point and Columbia plot from functional QCD

Not scheduled

20m

Goethe University Frankfurt, Campus Westend, Theodor-W.-Adorno-Platz 1, 60629 Frankfurt am Main, Germany

Oral QCD phase diagram & critical point

Speaker

Prof. Christian Fischer (University of Giessen, Germany)

Description

In the past year, results for the location of the critical point from different
approaches seem to converge towards previous predictions from functional QCD.
We summarise recent theoretical results of the latter approach on the
Columbia plot [1], the QCD phase diagram and the location of the critical
point at finite baryon chemical potential [3]. We highlight our efforts to
systematically gauge the approach by making contact with lattice results
at zero and imaginary chemical potential [2] in various regions of the Columbia
plot [1]. We furthermore discuss steps towards making contact with experiment
via baryon number fluctuations [4].

[1] J. Bernhardt and C. S. Fischer, Phys. Rev. D 108 (2023) no.11, 114018
[2] J. Bernhardt and C. S. Fischer, Eur. Phys. J. A 59 (2023) no.8, 181
[3] P. J. Gunkel and C. S. Fischer, Phys. Rev. D 104 (2021) no.5, 054022
[4] P. Isserstedt, M. Buballa, C. S. Fischer and P. J. Gunkel, Phys. Rev. D 100 (2019) no.7, 074011