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 language | English |
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Article number | 028 |
Journal | Journal of High Energy Physics |
Volume | 2008 |
Issue number | 4 |
DOIs | |
Publication status | Published - 1 Apr 2008 |
Keywords
- Beyond standard model
- Higgs physics