ar X iv : h ep - p h / 99 10 44 9 v 1 2 2 O ct 1 99 9 PM / 99 – 40 HIGGS PARTICLES AT

ar X iv : h ep - p h / 99 10 50 6 v 1 2 7 O ct 1 99 9 hep - ph / 9910506 SHEP 99 / 18 Fine - Tuning Constraints on Supergravity Models

We discuss fine-tuning constraints on supergravity models. The tightest constraints come from the experimental mass limits on two key particles: the lightest CP even Higgs boson and the gluino. We also include the lightest chargino which is relevant when universal gaugino masses are assumed. For each of these particles we show how fine-tuning increases with the experimental mass limit, for four...

ar X iv : h ep - l at / 9 91 00 40 v 1 2 5 O ct 1 99 9 RUHN - 99 - 3 The Overlap Dirac Operator ⋆

This introductory presentation describes the Overlap Dirac Operator, why it could be useful in numerical QCD, and how it can be implemented.

ar X iv : h ep - p h / 97 10 22 9 v 1 2 O ct 1 99 7 SLAC - PUB - 7663 October 1997 Z ′ INVESTIGATIONS AT FUTURE LEPTON

ar X iv : h ep - p h / 99 10 24 8 v 1 6 O ct 1 99 9 1 Effect of σ ( 600 ) - Production in pp̄ → 3 π 0 at rest

ar X iv : h ep - e x / 99 10 03 1 v 1 1 5 O ct 1 99 9 Is there new physics in the 1999 ALEPH data ?

The first results on searches performed by ALEPH on the 1999 data sample are presented here. They are based on an integrated luminosity of about 54 pb−1 collected at the two centre-of-mass energies of 192 and 196 GeV. Preliminary results on searches for supersymmetric particles and for the neutral Higgs bosons are shown.