Quark Matter 2025

Session

Parallel session 10

10 Apr 2025, 09:00

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

Conveners

Parallel session 10: QCD phase diagram & critical point IV

• Joachim Stroth

1016. Next to leading order estimate for the critical endpoint from contours of constant observables with lattice QCD

Jana N. Guenther (University of Wuppertal)

10/04/2025, 09:00

QCD phase diagram & critical point

Oral

A recent suggestion for finding the QCD critical endpoint [arXiv:2410.16206]
is to investigate entropy contours on the QCD phase diagram. We generalize this
idea to other lines of constant observables, like that of strangeness
susceptibility. Such quantities can not be directly calculated in lattice QCD
because of the infamous sign problem. We present an analytical continuation of
various...

941. Critical point and Columbia plot from functional QCD

Prof. Christian Fischer (University of Giessen, Germany)

10/04/2025, 09:20

QCD phase diagram & critical point

Oral

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...

935. Search for the critical endpoint in high-statistics lattice QCD simulations

Alexander Adam (Bergische Universität Wuppertal)

10/04/2025, 09:40

QCD phase diagram & critical point

Oral

One method to estimate the position of the critical endpoint of QCD is to model the free energy as a rational function of the baryon chemical potential $\mu_B$ and determine the Lee-Yang edge singularities. Using high-statistics simulations on 4HEX improved staggered $16^3\times 8$ lattices by the Wuppertal-Budapest Collaboration we estimate the location of the closest singularity in the QCD...

798. Quantifying fluctuation signatures of the QCD critical point using maximum entropy freeze-out

Maneesha Sushama Pradeep

10/04/2025, 10:00

QCD phase diagram & critical point

Oral

A key question about the QCD phase diagram is whether there is a critical point somewhere on the boundary between the hadron gas and quark-gluon plasma phases, and if so where. Heavy-ion collisions offer a unique opportunity to search for signatures of such a critical point by analyzing event-by-event fluctuations in particle multiplicities. To draw meaningful conclusions from experimental...

995. Constraining the Phases of Hot QCD Matter via Precision Measurement of the Speed of Sound with the CMS Experiment

Wei Li (Rice University (US))

10/04/2025, 10:20

QCD phase diagram & critical point

Oral

Ultrarelativistic nuclear collisions have revealed the existence of a hot, dense medium exhibiting collective flow with minimal viscous dissipation, indicative of a strongly interacting quark-gluon plasma. The CMS Collaboration previously measured the speed of sound in this medium, determining a value of approximately 0.241 at an effective temperature of 219 MeV in ultracentral 5.02 TeV PbPb...