Particle decay and Quantum loop effects in inflationary cosmology
Hector De Vega
LPTHE Université Pierre et Marie Curie (Paris VI)
Lundi 16/03/2009, 11:00
Salle Claude Itzykson, Bât. 774, Orme des Merisiers
The lack of energy conservation in an expanding cosmological space-time
makes possible decay processes which are forbidden in Minkowski space-time.
In addition, cosmological modes in general do not decay exponentially with
time as shown by explicit quantum field evolution calculations.
Furthermore, one-loop quantum corrections to the slow-roll classical
inflaton evolution are explicitly derived. The infrared (superhorizon)
contributions exhibit infrared enhancements and the ultraviolet (subhorizon)
parts are completely specified by trace anomalies. Explicit formulas for the
loop corrections to the effective inflaton potential and to the primordial
power, source of the CMB anisotropies and seed of the large scale structure
of the universe are given.