Higgs inflation in metric and Palatini formalisms: Required suppression of higher dimensional operators

@article{Jinno2019HiggsII,
  title={Higgs inflation in metric and Palatini formalisms: Required suppression of higher dimensional operators},
  author={Ryusuke Jinno and Mio Kubota and K. Oda and S. Park},
  journal={arXiv: High Energy Physics - Phenomenology},
  year={2019}
}
We investigate the sensitivity of Higgs(-like) inflation to higher dimensional operators in the nonminimal couplings and in the potential, both in the metric and Palatini formalisms. We find that, while inflationary predictions are relatively stable against the higher dimensional operators around the attractor point in the metric formalism, they are extremely sensitive in the Palatini one: for the latter, inflationary predictions are spoiled by $|\xi_4| \gtrsim 10^{-6}$ in the nonminimal… Expand