A New Way to Compute the Pseudoscalar Screening Mass at Finite Chemical Potential

2024/01/07 by Prasad Hegde, Hegde, Prasad, Rishabh Thakkar +1
Engineering · Materials Science · #Calcium Carbonate Crystallization and Inhibition #FOS: Physical sciences #Field-Flow Fractionation Techniques #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #Thermal and Kinetic Analysis

paper · doi:10.48550/arxiv.2401.03404

openalex publication_date 2024/01/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29

Abstract

We present a method to calculate the pion screening mass in 2+1-flavor lattice QCD to O(μ²_ℓ), where μ_ℓ is the isoscalar chemical potential. Our approach is based on the expression for the free theory pion screening correlator for massless quarks. We use the Taylor expansion method to calculate the screening correlator to O(μ⁴_ℓ). We then extract the O(μ²_ℓ) Taylor coefficient of the screening mass from the Taylor coefficients of the correlator, for two temperatures in the range 2 - 3 GeV. Our calculations were done using the Highly Improved Staggered Quark action, and the strange and light quark masses were set respectively to their physical and nearly physical values, corresponding to meson masses M_ss=686 MeV and M_π=160 MeV.

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