Work

Enhancement of h→γγ via spin-0 and spin-1/2 charged unparticle loops

Year: 2013

Type: article

Abstract: We calculate the spin-0 and spin-1/2 charged unparticle loop contributions to the Higgs diphoton decay within an unparticle gauge model and show that they can significantly enhance or suppress SM predictions for the same. In the SM limits of scalar and fermion conformal dimensions, dUs→1 and dUf→3/2 respectively, our results exactly reproduce the contributions of the spin-0 and spin-1/2 particle cases. Furthermore the decoupling from the Higgs boson occurs only for the spin-0 case in the critical limit dUs→2. Using the recent ATLAS data which reported an excess of diphoton decay rate of SM-like Higgs boson around 125 GeV, and taking into account the vacuum stability and perturbativity conditions, the parameters of the gauge unparticle model are constrained.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2013.12.032

Authors: Idir Aliane, Noureddine Mebarki, Yazid Delenda

Institutions: University Frères Mentouri Constantine 1, University of Batna 1

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid:

Funders: Agence Thématique de Recherche en Science et Technologie, Direction Générale de la Recherche Scientifique et du Développement Technologique