ar X iv : h ep - t h / 98 12 13 9 v 1 1 6 D ec 1 99 8 U - duality and M - theory , an algebraic approach ∗

ar X iv : h ep - p h / 98 12 29 9 v 1 9 D ec 1 99 8 FERMILAB – CONF – 98 / 390 – T Perspectives on Heavy Quark 98 Chris Quigg

I summarize and comment upon some highlights of HQ98, the Workshop on Heavy Quarks (strange, charm, and beauty) at Fixed Target.

ar X iv : h ep - t h / 98 12 18 6 v 1 2 1 D ec 1 99 8 Yangians , finite W - algebras and the Non Linear Schrödinger hierarchy

ar X iv : h ep - t h / 98 12 03 2 v 1 3 D ec 1 99 8 Holography and the Weyl anomaly

We review our calculation of theWeyl anomaly for d-dimensional conformal field theories that have a description in terms of a (d+ 1)-dimensional gravity theory.

ar X iv : h ep - p h / 98 12 39 9 v 1 1 6 D ec 1 99 8 1 The Tau Lepton : Particle Physics in a Nutshell

τ decays 5. Beyond the Standard Model 5.1 CP violation in hadronic τ decays 5.2 " Forbidden " decays.

ar X iv : h ep - t h / 98 12 13 2 v 1 1 5 D ec 1 99 8 Lorentz and PCT Violating Chern - Simons Term in the Derivative Expansion of QED ∗

We calculate by the method of dimensional regularization and derivative expansion the one-loop effective action for a Dirac fermion with a Lorentz-violating and PCT-odd kinetic term in the background of a gauge field. We show that this term induces a Chern-Simons modification to Maxwell theory. Some related issues are also discussed.