Speaker
Osvaldo Ferreira Neto
(Federal University of Rio de Janeiro and Goethe University)
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 compatible with previous calculations and lattice simulations.
Authors
Osvaldo Ferreira Neto
(Federal University of Rio de Janeiro and Goethe University)
Dr
Eduardo Souza Fraga
(Federal University of Rio de Janeiro)
