PoS - Proceedings of Science
Volume 400 - The International conference on Critical Point and Onset of Deconfinement (CPOD2021) - session Mon3
High-order baryon number fluctuations within the fRG approach
W.j. Fu
Full text: pdf
Pre-published on: August 23, 2022
Published on: September 01, 2022
We compute high-order baryon number fluctuations at finite temperature and density within a QCD-assisted low energy effective field theory. Quantum, thermal and density fluctuations are incorporated with the functional renormalization group approach. Quantum and in-medium fluctuations are encoded via the evolution of renormalization group flow equations. The resulting fourth- and sixth-order baryon number fluctuations meet the lattice benchmark results at vanishing density. They are consistent with experimental measurements, and in particular, the non-monotonic dependence of the kurtosis of net-baryon number distributions on the collision energy is observed in our calculations. This non-monotonicity arises from the increasingly sharpened chiral crossover with the decrease of collision energy.
DOI: https://doi.org/10.22323/1.400.0009
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