ar X iv : h ep - p h / 96 11 22 3 v 1 4 N ov 1 99 6 Significance of Single Pion Exchange Inelastic Final State Interaction for D → V P Processes

ar X iv : h ep - p h / 96 11 42 1 v 1 2 6 N ov 1 99 6 SLAC – PUB – 7361 November 1996 QCD : Questions , Challenges , and Dilemmas ∗

An introduction to some outstanding issues in QCD is presented, with emphasis on work by Diakonov and co-workers on the influence of the instanton vacuum on low-energy QCD observables. This includes the calculation of input valence-parton distributions for deep-inelastic scattering.

ar X iv : h ep - p h / 95 11 26 8 v 1 8 N ov 1 99 5 TTP 95 - 39

We review current issues in exclusive semileptonic tau decays. We present the formalism of structure functions, and then discuss predictions for final states with kaons, for decays into four pions and for radiative corrections to the decay into a single pion.

ar X iv : h ep - p h / 96 11 30 6 v 1 1 2 N ov 1 99 6 INTRODUCTION TO THE POMERON 1

ar X iv : h ep - p h / 97 11 36 4 v 1 1 8 N ov 1 99 7 903 : CP Violation from Charged Higgs Exchange in Hadronic Tau Decays with Unpolarized Beams

CP violating signals in semileptonic τ decays induced by an exotic scalar exchange are studied in a completely model-independent way. These can be observed in decays of unpolarized single τ 's even if their rest frame cannot be reconstructed. No beam polarization is required. The importance of the two-meson channel, in particular the Kπ final state is emphasized.

ar X iv : h ep - p h / 95 11 41 2 v 1 2 4 N ov 1 99 5 UWThPh - 1995 - 36 November 1995 Low – Energy QCD

After a brief introduction to chiral perturbation theory, the effective field theory of the standard model at low energies, two recent applications are reviewed: elastic pion–pion scattering to two– loop accuracy and the complete renormalized pion–nucleon Lagrangian to O(p 3) in the chiral expansion.