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arXiv · 0802.2680

The Higgs as a Portal to Plasmon-like Unparticle Excitations

A. Delgado·J. R. Espinosa·J. M. No·M. Quiros
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Abstract

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.

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A. Delgado, J. R. Espinosa, J. M. No, M. Quiros. 2008-02-19. The Higgs as a Portal to Plasmon-like Unparticle Excitations. https://doi.org/10.1088/1126-6708%2F2008%2F04%2F028

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