ar X iv : h ep - p h / 95 08 23 1 v 1 4 A ug 1 99 5 KOBE – FHD – 95 – 05 June 25 1995

ar X iv : h ep - p h / 95 08 24 5 v 1 5 A ug 1 99 5 UCSD / PTH 95 - 07 June 1995 EFFECTIVE FIELD THEORIES

These lectures introduce some of the basic notions of effective field theories, as used in particle physics. The topics discussed are the ∆S = 1 and ∆S = 2 weak interactions, and chiral perturbation theory as applied to mesons, baryons, and hadrons containing heavy quarks.

ar X iv : h ep - p h / 95 09 21 5 v 1 4 S ep 1 99 5 PM / 95 - 31 June 1995 Residual New Physics Effects in e +

ar X iv : h ep - p h / 95 08 38 1 v 1 2 8 A ug 1 99 5 CERN - TH / 95 - 233 RADIATIVE CORRECTIONS TO e γ SCATTERING

We investigate the effects of photon radiation on deep-inelastic eγ scattering. Depending on the set of variables chosen, we find appreciable effects in the kinematic region accessible at LEP2. Convenient analytic results for O(α) corrected differential cross sections are presented. CERN-TH/95-233 August 1995 E-mail address: [email protected] E-mail address: [email protected]

ar X iv : h ep - p h / 95 08 29 4 v 1 1 4 A ug 1 99 5 UND - HEP - 95 - BIG 08 July 1995 QUO VADIS , FASCINUM ? 1

The recent progress in our understanding of heavy-flavour decays allows us to define more reliably which future measurements on charm decays are needed to further advance our understanding of QCD and to get our theoretical tools ready for treating beauty decays. After sketching the theoretical landscape I list those required measurements. I argue that some – in particular those concerning inclu...

ar X iv : h ep - t h / 95 06 05 1 v 1 8 J un 1 99 5 June 1995 TAUP – 2253

We show that instantons violate a supersymmetric identity in a classically supersymmetric Higgs model with no massless fermions. This anomalous breaking arises because the correct perturbative expansion in the instanton sector is not supersymmetric. The attempt to construct a manifestly supersymmetric expansion generates infra-red divergences.