1,147 research outputs found
Beyond the Standard Model
Six major frameworks have emerged attempting to describe particle physics
beyond the Standard Model. Despite their different theoretical genera, these
frameworks have a number of common phenomenological features and problems.
While it will be possible (and desirable) to conduct model-independent searches
for new physics at the LHC, it is equally important to develop robust methods
to discriminate between BSM 'look-alikes'.Comment: 10 pages, 5 figures, Lectures given at the 2009 European School of
High-Energy Physics, Bautzen, Germany, 14-27 Jun 200
Moriond Electroweak 2006: Theory Summary
A concise look at the big picture of particle physics, including the status
of the Standard Model, neutrinos, supersymmetry, extra dimensions and
cosmology. Based upon the theoretical summary presented at the XLIst Rencontres
de Moriond on Electroweak Interactions and Unified Theories, La Thuile, 11-18
March 2006.Comment: 12 pages, 5 figure
Homeotic Supersymmetry
It is commonly believed that unbroken supersymmetry (SUSY) implies that all
members of a supermultiplet have the same mass. We demonstrate that this is not
true, by exhibiting a simple counterexample. We employ the formalism of
homeotic fermions, in a simple model where CPT conjugate fermions have
different masses. This model can be supersymmetrized to a hypermultiplet of
fields which form a representation of the conventional N=2 SUSY algebra.
Nevertheless, CPT conjugate states in this hypermultiplet have different
masses. These surprising results do not violate either the CPT theorem nor the
Haag-Lopuszanski-Sohnius theorem.Comment: 4 pages, revte
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