Light signals from a lighter Higgs

Light Higgs bosons from a strongly interacting Higgs sector

The mass and the decay width of a Higgs boson in the minimal standard model are evaluated by a variational method in the limit of strong self-coupling interaction. The non-perturbative technique provides an interpolation scheme between strong-coupling regime and weak-coupling limit where the standard perturbative results are recovered. In the strong-coupling limit the physical mass and the deca...

Discovering a Light Higgs Boson with Light

We evaluate the prospects for detecting a non-standard light Higgs boson with a significant branching ratio to two photons, in the Run II of the Fermilab Tevatron. We derive the reach for several channels: 2γ inclusive, 2γ + 1 jet, and 2γ + 2 jets. We present the expected Run II limits on the branching ratio of h → γγ as a function of the Higgs mass, for the case of “bosonic”, as well as “topco...

Four body decay of the lighter top squark constrained by the Lighter CP-even Higgs boson mass bound

We reinvestigated the parameter space favouring the 4-body decay of the lighter top squark accessible at Tevatron Run-II consistent with the lighter CP-even Higgs boson mass bound from LEP, in mSUGRA as well as in unconstrained supersymmetric models. Our results show that the lighter top squark search prospects via the 4-body decay mode, in particular the l+n−jets+E/T topology, are not promisin...

A Lighter Skin Tone

New Higgs Signals from Flavor Physics in Large Extra Dimensions

In a realistic theory with large extra dimensions and TeV scale gravity, there are often other particles living in the extra dimensions in addition to gravitons. A well motivated candidate is the flavon in a flavor theory which explains the smallness of the fermion masses by the large volume of the extra dimensions. The flavon interactions involve the Higgs field and can therefore give rise to ...