Seminário do Grupo de Hádrons e Física Teórica (GRHAFITE) – FEP – FNC
“Swimming and swirling colorful ghosts”
Prof. Dr. Donato Giorgio Torrieri, UNICAMP.
Dia 30 de outubro, terça-feira, às 17h.
Local: Ed. Principal, Ala 2, IFUSP, Sala 335.
ABSTRACT:
We show that the ideal fluid limit, defined as the existence of a flow frame uµ with respect to which the fluid is homogenous and isotropic, and the consequent independence of the equation of state on uµ, is incompatible with non-Abelian gauge theory. Instead, the equation of state becomes dependent on uµ via modes which are roughly equivalent to ghost modes in the hydrodynamic limit. These modes can be physically imagined as a field of ''Purcell’s swimmers'' whose ''arms and legs'' are outstretched in Gauge space. Also, vorticity should couple to the Wilson loop in the usual way, via the chromo-magnetic field tensor. This tensor, however, is not a ''force'' but instead represents the polarization tensor of the gluons. We speculate on the whole of these nonhydrodynamic modes in quark-gluon plasma thermalization.
