Inflation models with peccei–quinn symmetry and axion kinetic misalignment

HIGHLIGHTS

• What: The authors propose a consistent framework with the U Peccei-Quinn (PQ) symmetry for obtaining the initial condition for axion kinetic misalignment from inflation. Assuming that the PQ symmetry is explicitly violated in the scalar potential by quantum gravity effects the authors show that a sufficiently large initial axion velocity can be obtained before the QCD phase transition while avoiding the axion quality problem. As a result the authors show that a sufficiently high reheating temperature can be obtained dominantly from the Higgs-portal couplings to the PQ field while being consistent with axion kinetic misalignment . . .
  

   

  

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