ar X iv : h ep - t h / 01 09 18 8 v 1 2 4 Se p 20 01 Curvature actions on Spin ( n ) bundles

ar X iv : h ep - t h / 01 09 18 5 v 1 2 4 Se p 20 01 Once again : Instanton method vs . WKB

A recent renewed claim that the instanton method and the WKB method do not lead to identical results in the 1–loop approximation is repudiated. It is pointed out that the WKB method, or its equivalent, yields the instanton result provided the boundary conditions are imposed on wave functions which are properly matched in domains of overlap.

ar X iv : h ep - p h / 01 01 28 0 v 1 2 4 Ja n 20 01 SPIN Progress and Prospects

I review the progress in fundamental spin physics over the past several years and the prospects for the future. The progress is striking and the prospects are excellent.

ar X iv : h ep - t h / 03 01 12 7 v 1 1 7 Ja n 20 03 Supersymmetry in Spaces of Constant Curvature

ar X iv : h ep - e x / 01 09 01 0 v 2 2 6 Se p 20 01 1 Color Transparency via Coherent Exclusive ρ 0 Production

We examine the potential of the COMPASS experiment at CERN to study color transparency via exclusive coherent vector meson production in hard muon-nucleus scattering. It is demonstrated that COMPASS has high sensitivity to test this important prediction of perturbative QCD.

ar X iv : h ep - t h / 01 09 11 8 v 1 1 4 Se p 20 01 Conformal Gaussian Approximation

We present an alternative way to determine the unknown parameter associated to a gaussian approximation in a generic twodimensional model. Instead of the standard variational approach, we propose a procedure based on a quantitative prediction of conformal invariance, valid for systems in the scaling regime, away from criticality. We illustrate our idea by considering, as an example, the sine-Go...