ar X iv : h ep - t h / 93 05 15 3 v 1 2 7 M ay 1 99 3 SU ( 2 ) ACTION - ANGLE VARIABLES

ar X iv : h ep - t h / 93 05 10 4 v 1 2 1 M ay 1 99 3 The role of mathematics in contemporary theoretical physics ∗

ar X iv : h ep - p h / 93 05 25 8 v 1 1 2 M ay 1 99 3 Revenge of the One - Family Technicolor Models

We describe how isospin splitting and techniquark-technilepton splitting in one-family technicolor models can reduce the predicted value of the electroweak radiative correction parameter S, without making a large contribution to the T parameter.

ar X iv : h ep - p h / 93 05 29 8 v 1 2 1 M ay 1 99 3 CHIRAL PERTURBATION THEORY

The basic ideas and power counting rules of chiral perturbation theory are discussed. The formalism of velocity dependent fields for baryons, and for hadrons containing a heavy quark, is explained. UCSD/PTH 93-12 hep-ph/9305298 May 1993

ar X iv : h ep - t h / 99 05 21 1 v 1 2 7 M ay 1 99 9 hep - th / 9905211 HUTP - 99 / A 023 Holography for Coset Spaces

M/string theory on noncompact, negatively curved, cosets which generalize AdSD+1 = SO(D, 2)/SO(D, 1) is considered. Holographic descriptions in terms of a conformal field theory on the boundary of the spacetime are proposed. Examples include SU(2, 1)/U(2), which is a Euclidean signature (4, 0) space with no supersymmetry, and SO(2, 2)/SO(2) and SO(3, 2)/SO(3), which are Lorentzian signature (4,...

ar X iv : h ep - p h / 96 05 24 2 v 1 7 M ay 1 99 6 Meson bound states in multiflavour massive Schwinger model ∗

The problem of meson bound states with N f massive fermions in two dimensional quantum electrodynamics is discussed. We speculate about the spectrum of the lightest particles by means of the effective semiclassical description. In particular, the systems of fundamental fermions with SU (2) and SU (3) flavour symmetries broken by massive terms are investigated.