Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-12-25
Phys.Rev.D79:055013,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
version in PRD (discussions added)
Scientific paper
10.1103/PhysRevD.79.055013
We study the Higgs boson decays and production via gluon fusion at the LHC as a probe of two typical littlest Higgs models which introduce a top quark partner with different (even and odd) T-parity to cancel the Higgs mass quadratic divergence contributed by the top quark. For each model we consider two different choices for the down-type quark Yukawa couplings. We first examine the branching ratios of the Higgs boson decays and then study the production via gluon fusion followed by the decay into two photons or two weak gauge bosons. We find that the predictions can be quite different for different models or different choices of down-type quark Yukawa couplings and all these predictions can sizably deviate from the SM predictions. So the Higgs boson processes at the LHC can be a sensitive probe for these littlest Higgs models.
Wang Lei
Yang Jin Min
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