Towards a parameter-free analysis of the QCD chiral phase transition and its universal critical behavior

2025/01/23 by Mitra, Sabarnya, Karsch, Frithjof
#FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2501.13653

Abstract

To quantify the universal properties of chiral phase transition in (2+1)-flavor QCD, we use an improved, renormalized order parameter for the chiral symmetry breaking. We construct ratios of this divergence-free order parameter from its values for different pairs of light quark masses. From this, we determine in a parameter-independent manner, the chiral phase transition temperature T_c and the associated critical exponent δ of the universality class. We present first numerical results of these calculations on N_τ=8 lattices, with staggered fermions.

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