Masses and decay constants of the scalar quarkonia, Q0ðQ 1⁄4 b; cÞ with quantum numbers IGðJPCÞ 1⁄4 0þð0þþÞ, are calculated in the framework of the QCD sum rules approach both in vacuum and finite temperature. The masses and decay constants remain unchanged up to T ’ 100 MeV but they start to diminish with increasing the temperature after this point. Near the critical or deconfinement temperatu...

We consider the effective theories governing the sensitivity to the plasma of certain high-energy observables in supersymmetric plasmas, and point out that they preserve supersymmetry. Our findings generalize previous observations on asymptotic thermal masses in weakly coupled plasmas, to both the real and imaginary parts of self-energies, on the light cone and away from it, in weakly and stron...

Deformation, a key concept in our understanding of heavy nuclei, is based on a mean-field description that breaks the rotational invariance of the nuclear many-body Hamiltonian. We present a method to analyze nuclear deformations at finite temperature in a framework that preserves rotational invariance. The auxiliary-field Monte Carlo method is used to generate a statistical ensemble and calcul...

The coupling with the lattice vibrations is shown to drastically modify the state-of-the-art picture of the excitonic states based on a frozen-atom approximation. The zero-point vibrations renormalize the bare energies and optical strengths. Excitons acquire a nonradiative lifetime that decreases with increasing temperature. The optical brightness turns out to be strongly temperature-dependent ...