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



Autor: Antonio Delgado, Jose R. Espinosa, Mariano Quiros

Fuente: https://arxiv.org/







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