Abstract
In this work, extending a previous study at zero temperature (), we perform a systematic study of the modifications to the QCD vacuum energy density in the finite-temperature case, above the chiral transition at , caused by a nonzero value of the parameter , using two different effective Lagrangian models which implement the axial anomaly of the fundamental theory and which are both well defined also above . In particular, we derive (and critically compare) the expressions for the topological susceptibility and for the second cumulant starting from the dependence of in the two models.
- Received 29 March 2019
DOI:https://doi.org/10.1103/PhysRevD.99.114009
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society