4,489 research outputs found
Inverse scattering and solitons in affine Toda field theories II
New single soliton solutions to the affine Toda field theories are
constructed, exhibiting previously unobserved topological charges. This goes
some of the way in filling the weights of the fundamental representations, but
nevertheless holes in the representations remain. We use the group doublecross
product form of the inverse scattering method, and restrict ourselves to the
rank one solutions.Comment: 19 pages, latex, 12 fig
Inverse scattering and solitons in affine Toda field theories
We implement the inverse scattering method in the case of the affine
Toda field theories, by studying the space-time evolution of simple poles in
the underlying loop group. We find the known single soliton solutions, as well
as additional solutions with non-linear modes of oscillation around the
standard solution, by studying the particularly simple case where the residue
at the pole is a rank one projection. We show that these solutions with extra
modes have the same mass and topological charges as the standard solutions, so
we do not shed any light on the missing topological charge problem in these
models. We also show that the integrated energy-momentum density can be
calculated from the central extension of the loop group.Comment: 28 pages, Latex, 4 figs include
Sputtered gold mask for deep chemical etching of silicon
Sputtered mask resists chemical attack from acid and has adherence to withstand prolonged submergence in etch solution without lifting from silicon surface. Even under prolonged etch conditions with significant undercutting, gold mask maintained excellent adhesion to silicon surface and imperviousness to acid
LiBeB, Cosmic Rays and Gamma-Ray Line Astronomy
This article is a summary of a recently held conference on the light
elements, Li, Be and B, and their relationship to cosmic-ray origin and
gamma-ray astronomy. The proceedings will be published by the PASP.Comment: latex 6 pages, uses aasms4.sty To appear in the Publications of the
Astronomical Society of the Pacific (PASP
On a generalised bootstrap principle
The S-matrices for non-simply-laced affine Toda field theories are considered
in the context of a generalised bootstrap principle. The S-matrices, and in
particular their poles, depend on a parameter whose range lies between the
Coxeter numbers of dual pairs of the corresponding non-simply-laced algebras.
It is proposed that only odd order poles in the physical strip with positive
coefficients throughout this range should participate in the bootstrap. All
other singularities have an explanation in principle in terms of a generalised
Coleman-Thun mechanism. Besides the S-matrices introduced by Delius, Grisaru
and Zanon, the missing case (), is also considered and
provides many interesting examples of pole generation.Comment: 23 pages including two figures, harvma
A study of the attitudes of ten mothers toward their fourth pregnancy, as compared to the attitudes of ten mothers toward their first pregnancy.
Thesis (M.S.)--Boston Universit
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