ar X iv : h ep - t h / 96 02 01 3 v 1 3 F eb 1 99 6 Laughlin States on the Poincare half - plane and its quantum group symmetry

ar X iv : h ep - p h / 96 02 20 5 v 1 1 F eb 1 99 6 Multiplicity Distributions in QCD and λφ 36 - model

ar X iv : h ep - t h / 96 02 17 7 v 2 2 2 D ec 1 99 6 Coulomb Gas on the Half Plane ⋆

The Coulomb-gas description of minimal models is considered on the half plane. Screening prescriptions are developed by the perturbative expansion of the Liouville theory with imaginary coupling and with Neumann boundary condition on the bosonic field. To generate the conformal blocks of more general boundary conditions, we propose the insertion of boundary operations.

ar X iv : h ep - t h / 99 02 02 7 v 1 3 F eb 1 99 9 INFRARED REGION OF QCD AND CONFINEMENT

Gauge field configurations appropriate for the infrared region of QCD is proposed. Using the usual QCD action, confinement is realized as in the London theory of Meissner effect.

ar X iv : h ep - t h / 01 02 19 1 v 2 1 F eb 2 00 2 Wigner ’ s Little Group , Gauge Transformations and Dimensional Descent

Wigner’s little group[1], which is a subgroup of the Poincare group that leaves the fourmomentum invariant, is of fundamental importance for both massive and massless particles. In the latter case this group is E(2), which is a semi-direct product of T (2) (the group of translations in the plane) and SO(2). Each of these subgroups has its own role, but here we are concerned with T (2) which act...

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.