4 papers
Parametric Decay of the Curvaton
K. Enqvist, S. Nurmi, G. I. Rigopoulos
We argue that the curvaton decay takes place most naturally by way of a broad parametric resonance. The mechanism is analogous to resonant inflaton decay but does not require any t…
Dynamics of MSSM flat directions consisting of multiple scalar fields
K. Enqvist, A. Jokinen, A. Mazumdar
Although often chosen because of simplicity, a single scalar field does not provide a general parametrization of an MSSM flat direction. We derive a formalism for a class of gauge…
Possible astrophysical signatures of heavy stable neutral relics in supergravity models
Rouzbeh Allahverdi, Kari Enqvist, Anupam Mazumdar
We consider heavy stable neutral particles in the context of supergravity and show that a gravitationally suppressed inflaton decay can produce such particles in cosmologically int…
Numerical simulations of fragmentation of the Affleck-Dine condensate
K. Enqvist, A. Jokinen, T. Multamaki +1
We present numerical simulations of fragmentation of the Affleck-Dine condensate in two spatial dimensions. We argue analytically that the final state should consist of both Q-ball…