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arXiv · 1002.2730

Comment on Higgs Inflation and Naturalness

C. P. Burgess·Hyun Min Lee·Michael Trott
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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.

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C. P. Burgess, Hyun Min Lee, Michael Trott. 2010-07-06. Comment on Higgs Inflation and Naturalness. https://doi.org/10.1007/jhep07(2010)007

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