Vyacheslav S. Rychkov

Higgs boson from an extended symmetry

The variety of ideas put forward in the context of a composite picture for the Higgs boson calls for a simple and effective description of the related phenomenology. Such a description is given here by means of a minimal model and is explicitly applied to the example of a Higgs-top sector from an

Thermal production of gravitinos

SO(5)

Supersymmetry without a Light Higgs Boson

symmetry. We discuss the spectrum, the electroweak precision tests, B-physics, and naturalness. We show the difficulty in complying with the different constraints. The extended gauge sector relative to the standard

Gravitational corrections to standard model vacuum decay

SU(2)ifmmodetimeselsetexttimesfi{}U(1)

Minisuperspace quantization of 'Bubbling AdS' and free fermion droplets

, if there is any, has little or no impact on these considerations. We also discuss the relation of the minimal model with its ``little Higgs or holographic extensions based on the same symmetry.

Black holes from colliding wavepackets

We reconsider thermal production of gravitinos in the early universe, adding to previously considered

Geometry quantization from supergravity: the case of "Bubbling AdS"

2ensuremath{rightarrow}2

Black hole production in particle collisions and higher curvature gravity

gauge scatterings: (a) production via

Heavy Vectors in Higgs-less models

1ensuremath{rightarrow}2

Supersymmetry without a light Higgs boson at the CERN LHC

decays, allowed by thermal masses: this is the main new effect, (b) the effect of the top Yukawa coupling, and (c) a proper treatment of the reheating process. Our final result behaves physically (larger couplings give a larger rate) and is twice larger than previous results, implying e.g. a constraint on the reheating temperature that is twice as strong. Accessory results about (supersymmetric) theories at finite temperature and gravitino couplings might have some pertinence.