ar X iv : h ep - t h / 98 03 09 8 v 1 1 2 M ar 1 99 8 The Faddeev - Popov term reviewed

ar X iv : h ep - p h / 98 03 43 3 v 1 2 4 M ar 1 99 8 THEORETICAL STATUS OF THE B c MESON

Theoretical predictions on the B c meson properties are reviewed.

ar X iv : h ep - t h / 98 03 05 9 v 1 6 M ar 1 99 8 A NEW CLASS OF INTEGRABLE MODELS OF 1 + 1 DIMENSIONAL DILATON GRAVITY COUPLED TO SCALAR MATTER

Integrable models of 1 + 1 dimensional gravity coupled to scalar and vector fields are briefly reviewed. A new class of integrable models with nonminimal coupling to scalar fields is constructed and discussed.

ar X iv : h ep - t h / 98 05 09 3 v 1 1 5 M ay 1 99 8 A Course on : “ Modular Localization and Nonperturbative Local Quantum Physics ”

ar X iv : h ep - t h / 05 09 05 3 v 1 8 S ep 2 00 5 Landau gauge Jacobian and BRST symmetry

We propose a generalisation of the Faddeev-Popov trick for Yang-Mills fields in the Landau gauge. The gauge-fixing is achieved as a genuine change of variables. In particular the Jacobian that appears is the modulus of the standard Faddeev-Popov determinant. We give a path integral representation of this in terms of auxiliary bosonic and Grassman fields extended beyond the usual set for standar...

ar X iv : h ep - t h / 98 03 07 9 v 1 1 0 M ar 1 99 8 Causal Theory for the Gauged Thirring Model

We consider the (2 + 1)-dimensional massive Thirring model as a gauge theory, with one fermion flavor, in the framework of the causal perturbation theory and address the problem of dynamical mass generation for the gauge boson. In this context we get an unambiguous expression for the coefficient of the induced Chern-Simons term.