Journalartikel

Jahr der Veröffentlichung: 2023

Zeitschrift: Physics Letters B

Bandnummer: 841

ISSN: 0370-2693

eISSN: 1873-2445

Open Access Status: Gold

DOI Link: https://doi.org/10.1016/j.physletb.2023.137908

Verlag: Elsevier

Abstract: 
We present results for the volume dependence of baryon number fluctuations in the vicinity of the (conjectured) critical endpoint of QCD. They are extracted from the nonperturbative quark propagator that is obtained as a solution to a set of truncated Dyson-Schwinger equations of (2 + 1)-flavor QCD in Landau gauge, which takes the backcoupling of quarks onto the Yang-Mills sector explicitly into account. This well-studied system predicts a critical endpoint at moderate temperatures and rather large chemical potential. We investigate this system at small and intermediate finite, three-dimensional, cubic volumes and study the resulting impact on baryon number fluctuations and ratios thereof up to fourth order in the region of the critical endpoint. Due to the limitations of our truncation, the results are quantitatively meaningful only outside the critical scaling region of the endpoint. We find that the fluctuations are visibly affected by the finite volume, particularly for antiperiodic boundary conditions, whereas their ratios are practically invariant.(c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons .org /licenses /by /4 .0/). Funded by SCOAP3.

Harvard-Zitierstil: Bernhardt, J., Fischer, C. and Isserstedt, P. (2023) Finite-volume effects in baryon number fluctuations around the QCD critical endpoint, Physics Letters B, 841, Article 137908. https://doi.org/10.1016/j.physletb.2023.137908

APA-Zitierstil: Bernhardt, J., Fischer, C., & Isserstedt, P. (2023). Finite-volume effects in baryon number fluctuations around the QCD critical endpoint. Physics Letters B. 841, Article 137908. https://doi.org/10.1016/j.physletb.2023.137908