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Strangeness Neutrality and QCD Thermodynamics

by Wei-jie Fu, Jan M. Pawlowski, Fabian Rennecke

Submission summary

As Contributors: Fabian Rennecke
Arxiv Link: (pdf)
Date accepted: 2020-01-24
Date submitted: 2019-11-29 01:00
Submitted by: Rennecke, Fabian
Submitted to: SciPost Physics
Discipline: Physics
Subject area: High-Energy Physics - Phenomenology
Approach: Theoretical


Since the incident nuclei in heavy-ion collisions do not carry strangeness, the global net strangeness of the detected hadrons has to vanish. We investigate the impact of strangeness neutrality on the phase structure and thermodynamics of QCD at finite baryon and strangeness chemical potential. To this end, we study the low-energy sector of QCD within a Polyakov loop enhanced quark-meson effective theory with 2+1 dynamical quark flavors. Non-perturbative quantum, thermal, and density fluctuations are taken into account with the functional renormalization group. We show that the impact of strangeness neutrality on thermodynamic quantities such as the equation of state is sizable.

Ontology / Topics

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Quantum chromodynamics (QCD)

Published as SciPost Phys. Core 2, 002 (2020)

Author comments upon resubmission

List of changes

(1) Edited Eqs. (13) and (14) to make the dependence on \bar{A} explicit.

(2) Added/modified Eqs. (16) and (17) on page 4.

(3) Removed the wave function renormalization / anomalous dimension from the discussion in and after Eq. (38).

(4) Emphasized the smallness of the effect of strangeness neutrality on the pseudocritical temperature at the beginning of Sec. IV.E and streamlined the discussion on the top left of page 15.

(5) Added the chiral and deconfinement crossover lines in Fig. 8.

(6) Corrected an embarrassing typo in App. B, left column on page 19.

(7) Removed some word duplications that we were able to find.

(8) Added our source to the caption of Tab. II on page 17, and pointed it out again after Eq. (A1)

(9) Mentioned potential errors from the initial conditions in Sec. IV.A., in the paragraph after Eq. (49).

(10) Clarified the definition of the speed of sound in and right after Eq. (54).

Submission & Refereeing History

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Resubmission 1808.00410v2 on 29 November 2019

Reports on this Submission

Anonymous Report 1 on 2020-1-16 Invited Report

  • Cite as: Anonymous, Report on arXiv:1808.00410v2, delivered 2020-01-16, doi: 10.21468/SciPost.Report.1455


The authors of the present manuscript have addressed almost all of my concerns in a satisfactory manner.

However, though the authors agree with my second point concerning the lengthy setup in Sec II and III, they have only made marginal changes. This is regrettable since the lengthy discussions obscure the core of this work. I do not think it is always a matter of taste as to whether one should make effort to improve accessibility, readability and, subsequently, impact.

Nevertheless, to avoid any further delay this work should be published now.

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