Comment on Higgs Inflation and Naturalness
High Energy Physics - Phenomenology
2014-11-20 v3
Abstract
We rebut the recent claim (arXiv:0912.5463) that Einstein-frame scattering in the Higgs inflation model is unitary above the cut-off energy Lambda ~ Mp/xi. We show explicitly how unitarity problems arise in both the Einstein and Jordan frames of the theory. In a covariant gauge they arise from non-minimal Higgs self-couplings, which cannot be removed by field redefinitions because the target space is not flat. In unitary gauge, where there is only a single scalar which can be redefined to achieve canonical kinetic terms, the unitarity problems arise through non-minimal Higgs-gauge couplings.
Cite
@article{arxiv.1002.2730,
title = {Comment on Higgs Inflation and Naturalness},
author = {C. P. Burgess and Hyun Min Lee and Michael Trott},
journal= {arXiv preprint arXiv:1002.2730},
year = {2014}
}
Comments
5 pages, 1 figure V3: Journal Version