Non-Gaussianity from Compositeness

Abstract

By assuming the field seeding the curvature perturbations $\zeta$ is a dynamically arising condensate, we are able to derive the relation $f_{NL}^2\simeq 10^{8}H/M_c$ between the non-Gaussianity parameter $f_{NL}$ and the ratio of the inflationary scale $H$ to the cutoff scale $M_c$ of the effective theory describing the condensate, thus relating the experimental bound on $f_{NL}$ to a bound on $M_c$.

7 pages,1 figure

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• Minimal Composite Inflation
• BICEP2 constrains Composite Inflation