2023/11/03 by Á. Gómez Nicola, Nicola, Angel Gómez, Patricia Roa-Bravo +3 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions #Pulsars and Gravitational Waves Research
paper · pdf · doi:10.48550/arxiv.2311.01917
We calculate the pion scattering amplitude at nonzero temperature and nonzero μ5, the chemical potential associated to chiral imbalance in a locally P-breaking scenario. The amplitude is calculated up to next to leading order in Chiral Perturbation Theory and is unitarized with the Inverse Amplitude Method to generate the poles of the f0(500) and ρ(770) resonances. Within the saturation approach, the thermal f0(500) pole allows to determine Tc(μ5), the transition temperature for chiral symmetry restoration. Our results confirm the growing behaviour of Tc(μ5) found in previous works and, through a fit to lattice results, we improve the uncertainty range of the low-energy constants associated to μ5 corrections in the chiral lagrangian. The results for the ρ(770) pole are compatible with previous works regarding the dilepton yield in heavy-ion collisions.