Unparticles-Higgs Interplay

Details Unparticles-Higgs Interplay Unparticles-Higgs Interplay

2007-07-30

arxiv.org/abs/0707.4309v2

JHEP0710:094,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 7 figures, typos corrected

Scientific paper

10.1088/1126-6708/2007/10/094

We show that scalar unparticles coupled to the Standard Model Higgs at the renormalizable level can have a dramatic impact in the breaking of the electroweak symmetry already at tree level. In particular one can get the proper electroweak scale without the need of a Higgs mass term in the Lagrangian. By studying the mixed unparticle-Higgs propagator and spectral function we also show how unparticles can shift the Higgs mass away from its Standard Model value, \lambda v^2, and influence other Higgs boson properties. Conversely, we study in some detail how electroweak symmetry breaking affects the unparticle sector by breaking its conformal symmetry and generating a mass gap. We also show that, for Higgs masses above that gap, unparticles can increase quite significantly the Higgs width.

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