1,930 research outputs found
Analysis of self-energy at finite temperature and density in the real-time formalism
Using the real time formalism of field theory at finite temperature and
density we have evaluated the in-medium self-energy from baryon and
meson loops. We have analyzed in detail the discontinuities across the branch
cuts of the self-energy function and obtained the imaginary part from the
non-vanishing contributions in the cut regions. An extensive set of resonances
have been considered in the baryon loops. Adding the meson loop contribution we
obtain the full modified spectral function of in a thermal gas of
mesons, baryons and anti-baryons in equilibrium for several values of
temperature and baryon chemical potential
Vector and axial vector mesons at finite temperature
We consider the thermal correlation functions of vector and axial-vector
currents and evaluate corrections to the vector and axial-vector meson pole
terms to one loop in chiral perturbation theory. As expected, the pole
positions do not shift to leading order in temperature. But the residues
decrease with temperature
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