Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 7, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP07(2010)007
Keywords
Higgs Physics; Cosmology of Theories beyond the SM
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Funding
- Government of Canada through Industry Canada
- Province of Ontario through the Ministry of Research Innovation
- Natural Sciences and Engineering Research Council (NSERC) of Canada
- National Research Foundation of Korea [2010-00399] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We reexamine recent claims that Einstein-frame scattering in the Higgs inflation model is unitary above the cut-off energy Lambda similar or equal to M-p/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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