1,414,265 research outputs found
Detection of Minimal Supersymmetric Model Higgs Bosons in \gam\gam Collisions: Influence of SUSY Decay Modes
We demonstrate that supersymmetric decay modes of the neutral Higgs bosons of
the MSSM could well make their detection extremely difficult when produced
singly in \gam\gam collisions at a back-scattered laser beam facility.Comment: 12 pages, requires phyzzx.tex and tables.tex, full postscript file
including embedded tables available via anonymous ftp at ucdhep.ucdavis.edu
as [anonymous.gunion]gamgamsusy.ps, preprint UCD-94-3
Classical Integrable N=1 and Super Sinh-Gordon Models with Jump Defects
The structure of integrable field theories in the presence of jump defects is
discussed in terms of boundary functions under the Lagrangian formalism.
Explicit examples of bosonic and fermionic theories are considered. In
particular, the boundary functions for the N=1 and N=2 super sinh-Gordon models
are constructed and shown to generate the Backlund transformations for its
soliton solutions. As a new and interesting example, a solution with an
incoming boson and an outgoing fermion for the N=1 case is presented. The
resulting integrable models are shown to be invariant under supersymmetric
transformation.Comment: talk presented at the V International Symposium on Quantum Theory and
Symmetries, Valladolid, Spain, July 22-28,200
A simple beam model for the shear failure of interfaces
We propose a novel model for the shear failure of a glued interface between
two solid blocks. We model the interface as an array of elastic beams which
experience stretching and bending under shear load and break if the two
deformation modes exceed randomly distributed breaking thresholds. The two
breaking modes can be independent or combined in the form of a von Mises type
breaking criterion. Assuming global load sharing following the beam breaking,
we obtain analytically the macroscopic constitutive behavior of the system and
describe the microscopic process of the progressive failure of the interface.
We work out an efficient simulation technique which allows for the study of
large systems. The limiting case of very localized interaction of surface
elements is explored by computer simulations.Comment: 11 pages, 13 figure
Effect of space environment on man's response to infection A review of literature and annotated bibliography
Review of literature on effects of space environment on human response to infectio
Improved apparatus for continuous culture of hydrogen-fixing bacteria
Improved apparatus permits the continuous culture of Hydrogenomonas eutropha. System incorporates three essential subsystems - /1/ environmentally isolated culture vessel, /2/ analytical system with appropriate sensors and readout devices, /3/ control system with feedback responses to each analytical measurement
The characteristic cohomology class of a triangulated category
This is the final version of a series of papers uploaded in May 25, 2005. We
have splitted the long last paper of the previous version in two parts to make
it easier to understand. The results are essentially the same, although the
presentation has changed substantially. The first three papers have not
changed.
This is a collection of five papers on the foundation of triangulated
categories in the context of groupoid-enriched categories, termed track
categories, and characteristic cohomology classes. As a main result it is shown
that given an additive category A with a translation functor t: A --> A and a
class V in translation cohomology H^3(A,t) then two simple properties of V
imply that (A,t) is a triangulated category. The cohomology class V yields an
equivalence class (B,[s]) where B is a track category with homotopy category A
and [s] is the homotopy class of a pseudofunctor s: B --> B inducing t. The two
properties of V correspond to natural axioms on B and s which again imply that
(A,t) is a triangulated category.
The five papers of this volume depend on each other by cross references, but
each paper can be read independently of the others so that the reader is free
to choose one of the papers to start. Each paper has its own abstract,
introduction and literature.Comment: 166 pages, some diagrams do not appear correctly in the DVI fil
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