Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-10-21
Phys.Rev. D62 (2000) 043508
Physics
High Energy Physics
High Energy Physics - Phenomenology
19 pages, 11 eps figures
Scientific paper
10.1103/PhysRevD.62.043508
The phenomenon of resonant production of particles {\it after} inflation has received much attention in the past few years. In a new application of resonant production of particles, we consider the effect of a resonance {\em during} inflation. We show that if the inflaton is coupled to a massive particle, resonant production of the particle during inflation modifies the evolution of the inflaton, and may leave an imprint in the form of sharp features in the primordial power spectrum. Precision measurements of microwave background anisotropies and large-scale structure surveys could be sensitive to the features, and probe the spectrum of particles as massive as the Planck scale.
Chung Daniel J. H.
Kolb Edward W.
Riotto Antonio
Tkachev Igor I.
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