Light-Cone 2023: Hadrons and Symmetries

Electric and magnetic susceptibilities of a hot and dense medium of massive fermions

Non programmé

20m

Rio de Janeiro, Brazil

Poster

Orateur

Osvaldo Ferreira (Universidade Federal do Rio de Janeiro)

Description

In this work we calculate the electric and magnetic susceptibilities of a hot and dense medium in equilibrium up to order $\mathcal{O}(\frac{m^4}{T^4})$ $\mathcal{O}(\frac{m^2}{T^2})$, respectively. These susceptibilities are associated with $\mathcal{O}(k^2)$ terms (power corrections) of the photon polarization tensor, which are computed here for a hot and dense medium of fermions with a small but nonzero mass, i.e., $0<m\ll T,\mu$. Our calculations are performed within the hard thermal loop approximation in the real-time formalism. In the high temperature and small chemical potential limit, our results are compared with previous calculations.