44,290 research outputs found
Unitarity constraints on chiral perturbative amplitudes
Low lying scalar resonances emerge as a necessary part to adjust chiral
perturbation theory to experimental data once unitarity constraint is taken
into consideration. I review recent progress made in this direction in a model
independent approach. Also I briefly review studies on the odd physical
properties of these low lying scalar resonances, including in the
processes.Comment: Talk given at: International Workshop on Effective Field Theories:
from the pion to the upsilon, February 2-6 2009, Valencia, Spai
Higgs-portal Scalar Dark Matter: Scattering Cross Section and Observable Limits
The simplest Higgs-portal dark matter model is studied in the light of dark
matter self-interacting effects on the formation of large scale structures. We
show the direct detection limits on the resonant and large mass regions.
Finally, we also compare these limits with those at the LHC and Xenon 1T
experiments.Comment: Published version, references adde
Scalar resonance at 750 GeV as composite of heavy vector-like fermions
We study a model of scalars which includes both the SM Higgs and a scalar
singlet as composites of heavy vector-like fermions. The vector-like fermions
are bounded by the super-strong four-fermion interactions. The scalar singlet
decays to SM vector bosons through loop of heavy vector-like fermions. We show
that the surprisingly large production cross section of di-photon events at 750
GeV resonance and the odd decay properties can all be explained. This model
serves as a good model for both SM Higgs and a scalar resonance at 750 GeV.Comment: 12 pages, no figure, references updated, version for publicatio
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