We present a simple effective field theory formulation of a general family of single-field flux monodromy models for which strong coupling effects at large field values can flatten the potential and activate higher-derivative operators. Both of these effects can suppress the tensor amplitude. These models are radiatively and nonperturbatively stable and can sustain 60 e folds of inflation. The dynamics combines features of both large-field chaotic inflation and k inflation. Reducing the tensor-scalar ratio below the observational bound r0.1 while keeping the scalar spectral index ns within experimental bounds either yields equilateral non-Gaussianity fNLeq≃O(1), close to the current observational bounds, or gives very small r.
Monodromy Inflation in the Strong Coupling Regime of the Effective Field Theory / D'Amico, Guido; Kaloper, Nemanja; Lawrence, Albion. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 121:9(2018), p. 091301. [10.1103/PhysRevLett.121.091301]
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