Topological properties of QCD: from vacuum structure to axion phenomenology
by
Massimo D'Elia(PI)
→
Europe/Rome
Aula Conversi (Dip. di Fisica - Edificio G. Marconi)
Aula Conversi
Dip. di Fisica - Edificio G. Marconi
Description
The presence of field configurations with non-trivial topology,
and the consequences related to the possible presence of a topological
parameter theta, are among the most interesting features of non-abelian
gauge theories, and are strictly related to their non-perturbative
properties. How theta-dependence changes as one increases the number of
colors,
or as one crosses the deconfinement temperature, gives us an
insight into various theoretical aspects of gauge theories. On the
other hand, the study of topological properties in the high temperature
regime
of QCD can be connected to the physics of axions and to their possible
role as dark matter candidates. I will review some recent results
on the subject, obtained by numerical simulations on a lattice.