Unparticle and Higgs as Composites.

Roman Zwicky, Francesco Sannino

Research output: Contribution to journalArticlepeer-review

Abstract

We propose a generic framework in which the Higgs and the unparticle are both composite. The underlying theories are four dimensional, asymptotically free, nonsupersymmetric gauge theories with fermionic matter. We sketch a possible uni- fication of these two sectors at a much higher scale resembling extended technicolor models. By construction our extensions are natural, meaning that there is no hierar- chy problem. The coupling of the unparticle sector to the composite Higgs emerges as a four-fermion operator. The bilinear unparticle operator near the electroweak scale has scaling dimension in the range 1 < dU < 3. We investigate, in various ways, the breaking of scale invariance induced by the electroweak scale resulting in an unparticle condensate. The latter acts as a natural infrared cut off or hadronic scale. We give the low-energy effective theory valid near the electroweak scale. The unparticle Higgs mixing is found to be suppressed within our framework.
Original languageEnglish
Article number015016
Pages (from-to)-
Number of pages14
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume79
Issue number1
DOIs
Publication statusPublished - 28 Jan 2009

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