The Higgs as a Portal to Plasmon-like Unparticle Excitations
Feb, 2008
12 pages
Published in:
- JHEP 04 (2008) 028
e-Print:
- 0802.2680 [hep-ph]
Report number:
- IFT-UAM-CSIC-08-09,
- CERN-PH-TH-2008-033,
- UAB-FT-639
View in:
Citations per year
Abstract: (arXiv)
A renormalizable coupling between the Higgs and a scalar unparticle operator O_U of non-integer dimension d_U<2 triggers, after electroweak symmetry breaking, an infrared divergent vacuum expectation value for O_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.- Higgs particle: coupling
- unparticle: scalar
- operator: stability
- infrared problem
- renormalization
- scaling: invariance
- mass: gap
- electroweak interaction: symmetry breaking
- plasmon: resonance
- spectral representation
References(16)
Figures(2)