Power Counting vs Higgs Inflation

          @misc{ scivideos_PIRSA:09050058,
            doi = {10.48660/09050058},
            url = {https://pirsa.org/09050058},
            author = {Trott, Michael},
            keywords = {Cosmology},
            language = {en},
            title = {Power Counting vs Higgs Inflation},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2009},
            month = {may},
            note = {PIRSA:09050058 see, \url{https://scivideos.org/pirsa/09050058}}
          }
          

Abstract

We use the power-counting formalism of effective field  theory to study the size of loop corrections in theories of slow-roll inflation, with the aim of more precisely identifying the limits of validity of the usual classical inflationary treatments. Although most slow-roll models lie within the semiclassical domain, we find the consistency of the Higgs-Inflaton scenario to be more delicate due to the proximity between the Hubble scale during inflation and the upper bound allowed by unitarity on the new-physics scale.