142 citations · 620 across the 19 of their papers we have counts for
3 papers · 1 filter
Supermassive gravitinos, dark matter, leptogenesis and flat direction baryogenesis
Rouzbeh Allahverdi, Steen Hannestad, Asko Jokinen +2
In general the gravitino mass and/or the soft supersymmetry breaking masses in the observable sector can be much larger than the TeV scale. Depending on the relation between the ma…
Cosmological constraints on string scale and coupling arising from tachyonic instability
Kari Enqvist, Asko Jokinen, Anupam Mazumdar +2
We demonstrate that string motivated inflation ending via tachyonic instability leaves a detectable imprint on the cosmic microwave background (CMB) radiation by virtue of the exci…
Non-Gaussianity from Instant and Tachyonic Preheating
Kari Enqvist, Asko Jokinen, Anupam Mazumdar +2
We study non-Gaussianity in two distinct models of preheating: instant and tachyonic. In instant preheating non-Gaussianity is sourced by the local terms generated through the coup…