We compute the CP violation in the decays of heavy electroweak singlet neutrinos, arising from both the oneâ€“loop vertex corrections and the wave function mixing. We extend the computation to theâ€¦ (More)

Supersymmetric extensions of the Standard Model that incorporate the axion solution to the strong CP problem necessarily contain also the axino, the fermionic partner of the axion. In contrast to theâ€¦ (More)

The connection of Dark Matter (DM) to our particle physics mo del is still one of the open cosmological questions. In these proceedings I will ar gue that axinos can be successful Cold Dark Matterâ€¦ (More)

We investigate scenarios in which a charged, long-lived scalar particle decouples from the primordial plasma in the Early Universe. We compute the number density at time of freeze-out consideringâ€¦ (More)

1550-7998=20 We consider the observational constraints on the running-mass inflationary model, and, in particular, on the scale dependence of the spectral index, from the new cosmic microwaveâ€¦ (More)

If the inflaton sector is described by softly broken supersymmetry, and the inflaton has unsuppressed couplings, the inflaton mass will run strongly with scale. Four types of model are possible. Theâ€¦ (More)

We compute the CP violating decay asymmetries relevant for baryogenesis scenarios involving the out of equilibrium decays of heavy particles, including the finite temperature effects arising from theâ€¦ (More)

Inflation is terminated by a non-equilibrium process which finally leads to a thermal state. We study the onset of this transition in a class of hybrid inflation models. The exponential growth ofâ€¦ (More)

If the axino is the lightest superpartner and satisfies cosmological bounds, including a preferred range of the relic abundance of cold dark matter, then the usual stringent constraints on theâ€¦ (More)

We study a supersymmetric SO(10) gauge theory in six dimensions compactified on an orbifold. Three sequential quark-lepton families are localized at the three fixpoints where SO(10) is broken to itsâ€¦ (More)