Crossover or First-Order: Impacts of Regularization
High Energy Physics - Phenomenology
2025-12-18 v1 Nuclear Theory
Abstract
The equation of state of hot, dense nuclear matter plays a fundamental role in many areas. However, owing to the nonperturbative nature of strong interactions, a reliable treatment is still under debate. We use a symmetry-preserving treatment of a vector\,\,vector contact interaction to study related issues at nonzero temperature or quark chemical potential, and carefully compare a noncovariant and a covariant regularization scheme. The numerical results show that the character of the phase transition depends sensitively on the regularization scheme and parameter choices.
Keywords
Cite
@article{arxiv.2512.15094,
title = {Crossover or First-Order: Impacts of Regularization},
author = {Xin-Peng Li and Hao-Ran Zhang and Zhu-Fang Cui and Thomas Klähn},
journal= {arXiv preprint arXiv:2512.15094},
year = {2025}
}