Goldstone bosons and a dynamical Higgs field

Details Goldstone bosons and a dynamical Higgs field Goldstone bosons and a dynamical Higgs field

2011-04-26

arxiv.org/abs/1104.4897v3

JCAP 1109 (2011) 006

Physics

High Energy Physics

High Energy Physics - Phenomenology

27 pages, 2 figures, published version

Scientific paper

Higgs inflation uses the gauge variant Higgs field as the inflaton. During inflation the Higgs field is displaced from its minimum, which results in associated Goldstone bosons that are apparently massive. Working in a minimally coupled U(1) toy model, we use the closed-time-path formalism to show that these Goldstone bosons do contribute to the one-loop effective action. Therefore the computation in unitary gauge gives incorrect results. Our expression for the effective action is gauge invariant upon using the background equations of motion.

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