ar X iv : h ep - t h / 97 05 04 3 v 1 7 M ay 1 99 7 Universality of the R - deformed Heisenberg algebra ∗

ar X iv : h ep - t h / 97 04 11 8 v 2 2 6 M ay 1 99 7 Deformed Chern – Simons Theories

We construct a Chern-Simons action for q–deformed gauge theory which is a simple and straightforward generalization of the usual one. Space-time continues to be an ordinary (commuting) manifold, while the gauge potentials and the field strengths become q–commuting fields. Our approach, which is explicitly carried out for the case of 'minimal' deformations, has the advantage of leading naturally...

ar X iv : h ep - p h / 97 05 45 5 v 1 2 8 M ay 1 99 7 LECTURE 1 Spectral Fluctuations of the QCD Dirac Operator

ar X iv : h ep - t h / 97 05 11 9 v 1 1 5 M ay 1 99 7 Virasoro Algebra and O ( N ) σ - model

Within the framework of a local expansion of the logarithm of the O(N) σmodel vacuum functional, valid for slowly varying fields, the modified Virasoro algebra is studied. The operator-like central charge term is given, up to second order, for a general functional. Typeset using REVTEX ∗Email address: [email protected]

ar X iv : h ep - p h / 97 05 32 1 v 1 1 5 M ay 1 99 7 LECTURE 10 Developing Transport Theory to Study the Chiral Phase Transition

ar X iv : h ep - p h / 97 05 23 6 v 2 8 M ay 1 99 7 OITS - 630 Contact Interaction

We reexamine the contact interaction hypothesis for excess high-Q events seen at HERA in ep → eX scattering. We consider the most general structure of contact interactions insisting on SU(3)C×SU(2)L×U(1)Y invariance. Apart from constraints for ee → qq̄ , Drell-Yan and atomic parity violation experiments, we find stringent constraints from neutrino deep inelastic data, provided one assumes lepton...