1,260 research outputs found
On the Unification of Gauge Symmetries in Theories with Dynamical Symmetry Breaking
We analyze approaches to the partial or complete unification of gauge
symmetries in theories with dynamical symmetry breaking. Several types of
models are considered, including those that (i) involve sufficient unification
to quantize electric charge, (ii) attempt to unify the three standard-model
gauge interactions in a simple Lie group that forms a direct product with an
extended technicolor group, and, most ambitiously, (iii) attempt to unify the
standard-model gauge interactions with (extended) technicolor in a simple Lie
group.Comment: 24 pages, ReVTe
SPINAS: Spinor Amplitude Subroutines for Constructive Diagram Evaluations
SPINAS is a C++ package created for the implementation and numerical
computation of phase-space points of constructive amplitudes in particle
physics. This package contains a suite of classes and methods for handling
particles, propagators, spinor products, and processes. SPINAS is structured to
offer straightforward usability while ensuring maximum efficiency. This is
achieved through a design that emphasizes the storage and reuse of intermediate
results within amplitude calculations for each phase-space point. We include a
user guide describing how to use the components, a complete example of how to
use SPINAS for a scattering amplitude, a discussion of the design and
implementation useful for those wishing to contribute, and a discussion of our
validation of this package, including both a validation of individual
components of the package and a comparison of a complete set of Standard Model
processes with Feynman diagrams.Comment: 39 pages, 0 figure
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