UV-Protected Inflation

Details UV-Protected Inflation UV-Protected Inflation

2010-12-03

arxiv.org/abs/1012.0853v3

Phys.Rev.Lett.106:161302,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages; v3: Minkowski limit of the "strong coupling scale" corrected; results unchanged; accepted in Phys. Rev. Lett. 2011

Scientific paper

10.1103/PhysRevLett.106.161302

In Natural Inflation, the Inflaton is a pseudo-Nambu-Goldstone boson which acquires a mass by explicit breaking of a global shift symmetry at scale f. In this case, for small field values, the potential is flat and stable under radiative corrections. Nevertheless, slow roll conditions enforce f>>M_p making the validity of the whole scenario questionable. In this letter, we show that a coupling of the Inflaton kinetic term to the Einstein tensor allows f<

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