Radiative Axion Inflation. (arXiv:1902.02666v1 [hep-ph])
<a href="http://arxiv.org/find/hep-ph/1/au:+Caputo_A/0/1/0/all/0/1">Andrea Caputo</a>
Planck data robustly exclude the simple $lambdaphi^4$ scenario for
inflation. This is also the case for models of Axion Inflation in which the
inflaton field is the radial part of the Peccei-Quinn complex scalar field. In
this letter we show that for the KSVZ model it is possible to match the data
taking into account radiative corrections to the tree level potential. After
writing down the 1-loop Coleman-Weinberg potential, we show that a radiative
plateau is easily generated thanks to the fact that the heavy quarks are
charged under $SU(3)_c$ in order to solve the strong CP problem. We also give a
numerical example for which the inflationary observables are computed and the
heavy quarks are predicted to have a mass $m_Q gtrsim 10^3TeV$.
Planck data robustly exclude the simple $lambdaphi^4$ scenario for
inflation. This is also the case for models of Axion Inflation in which the
inflaton field is the radial part of the Peccei-Quinn complex scalar field. In
this letter we show that for the KSVZ model it is possible to match the data
taking into account radiative corrections to the tree level potential. After
writing down the 1-loop Coleman-Weinberg potential, we show that a radiative
plateau is easily generated thanks to the fact that the heavy quarks are
charged under $SU(3)_c$ in order to solve the strong CP problem. We also give a
numerical example for which the inflationary observables are computed and the
heavy quarks are predicted to have a mass $m_Q gtrsim 10^3TeV$.
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