Work

The hyperfine splitting in QCD mesonic screening masses at asymptotically large temperatures

Year: 2025

Type: article

Abstract: A bstract We determine the hyperfine splitting in the QCD flavour non-singlet mesonic screening masses at asymptotically large temperatures. The analytic calculation is carried out in the dimensionally-reduced effective theory where the first non-zero contribution is of O ( g 4 ) in the QCD coupling constant g . Apart for its own theoretical interest, this result provides instrumental information to interpret and to parameterize non-perturbative data that are being produced at very high temperatures by numerical simulations of lattice QCD. Indeed, the comparison with existing non-perturbative results shows that higher order (non-perturbative) contributions in g are needed to explain the data up to the highest temperature explored, which is of the order of the electroweak scale.

Source: Journal of High Energy Physics

DOI: 10.1007/jhep05(2025)044

Authors: Marco Cè, Leonardo Giusti, Davide Laudicina, Michele Pepe, Pietro Rescigno

Institutions: Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca, University of Milano-Bicocca, Ruhr University Bochum

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: European Commission, NextGenerationEU

OpenAlex ID: W4410155579