Unified analysis of screening masses for vector and axial-vector mesons and their diquark partners in the Contact Interaction model

TL;DR

This paper provides a unified analysis of screening masses for vector and axial-vector mesons and diquarks across different quark flavors using a contact interaction model, highlighting chiral symmetry restoration at high temperatures.

Contribution

It offers a comprehensive, symmetry-preserving study of meson and diquark screening masses at finite temperature, including both light and heavy quarks, with systematic comparisons to other approaches.

Findings

Predictions agree with experimental data at T=0 MeV.

Parity partners of lightest mesons and diquarks converge at high T.

Results indicate chiral symmetry restoration at high temperature.

Abstract

We present a comprehensive study of the screening masses of vector and axial-vector mesons and their corresponding diquark partners within a symmetry-preserving vector-vector contact interaction approach. Our analysis includes mesons and diquarks composed of both light and heavy quarks, providing a unified description of their thermal behavior. The longitudinal and transverse modes of the screening masses are analyzed, and the results are systematically compared with other theoretical approaches. At $T = 0$ MeV, our predictions agree with available experimental data, and a comparison with the expected free theory limit at high temperatures is also presented. Notably, the parity partners of the lightest mesons and diquarks converge at high temperatures, signaling chiral symmetry restoration within this framework. These results provide a consistent and detailed picture of meson and diquark properties at finite temperature and lay the groundwork for extending the capabilities of the model to baryon screening masses in the quark-diquark picture.