The Higgs as a portal to Plasmon-like unparticle excitations

A. Delgado, J. R. Espinosa, J. M. No, M. Quirós

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19 Citations (Scopus)

Abstract

A renormalizable coupling between the Higgs and a scalar unparticle operator U of non-integer dimension d U<2 triggers, after electroweak symmetry breaking, an infrared divergent vacuum expectation value for U. Such IR divergence should be tamed before any phenomenological implications of the Higgs-unparticle interplay can be drawn. In this paper we present a novel mechanism to cure that IR divergence through (scale-invariant) unparticle self-interactions, which has properties qualitatively different from the mechanism considered previously. Besides finding a mass gap in the unparticle continuum we also find an unparticle pole reminiscent of a plasmon resonance. Such unparticle features could be explored experimentally through their mixing with the Higgs boson.
Original languageEnglish
Article number028
JournalJournal of High Energy Physics
Volume2008
Issue number4
DOIs
Publication statusPublished - 1 Apr 2008

Keywords

  • Beyond standard model
  • Higgs physics

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