SEMINARIO DE FISICA TEORICA I Y II

Titulo:         Static quark-antiquark pairs at finite temperature
Conferenciante: Antonio Vairo (Universita' di Milano)
Dia y hora:     7, 14:30 (aula 6A)

Resumen:

In a framework that makes close contact with modern effective field
theories for non-relativistic bound states at zero temperature, we study
the real-time evolution of a static quark-antiquark pair in a medium of
gluons and light quarks at finite temperature. For temperatures T ranging
from values larger to smaller than the inverse distance of the quark and
antiquark and at short distances, we derive the potential between the two
static sources, their energy and thermal decay width. We identify new
short-range contributions both to the real part of the potential and to
the decay width. For the latter, we point out the relevance of the singlet
to octet break up mechanism. The talk is based on N.Brambilla,
J.Ghiglieri, P.Petreczky and A. Vairo arXiv:0804.0993.