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8 papers · 2 filters
Signatures of Planck Corrections in a Spiralling Axion Inflation Model
John McDonald
The minimal sub-Planckian axion inflation model accounts for a large scalar-to-tensor ratio via a spiralling trajectory in the field space of a complex field . Here we consider…
Connection between dark matter abundance and primordial tensor perturbations
P. S. Bhupal Dev, Anupam Mazumdar, Saleh Qutub
Primordial inflation and Dark Matter (DM) could both belong to the hidden sector. It is therefore plausible that the inflaton, which drives inflation, could couple to the DM either…
Non-collider searches for stable massive particles
Sergey Burdin, Malcolm Fairbairn, Philippe Mermod +4
The theoretical motivation for exotic stable massive particles (SMPs) and the results of SMP searches at non-collider facilities are reviewed. SMPs are defined such that they would…
A Minimal Sub-Planckian Axion Inflation Model with Large Tensor-to-Scalar Ratio
John McDonald
We present a minimal axion inflation model which can generate a large tensor-to-scalar ratio while remaining sub-Planckian. The modulus of a complex scalar field with a $λ|Φ|^4…
Sub-Planckian Two-Field Inflation Consistent with the Lyth Bound
John McDonald
The BICEP2 observation of a large tensor-to-scalar ratio, , implies that the inflaton in single-field inflation models must satisfy i…
BICEP2, the curvature perturbation and supersymmetry
David H. Lyth
The tensor fraction found by BICEP2 corresponds to a Hubble parameter $H\simeq 1.0\times 10^{14}\GeV$ during inflation. This has two implications for the (single-fie…