ar X iv : h ep - e x / 99 09 03 7 v 1 2 2 Se p 19 99 Hadronic final state interactions at ALEPH and OPAL

ar X iv : h ep - e x / 99 09 03 9 v 1 2 3 Se p 19 99 The Partonic Structure of the Quasi - Real Photon

New measurements of dijet photoproduction at HERA provide information on the gluon density in the photon and on its quark densities at high x γ and high factorisation scales.

ar X iv : h ep - p h / 97 08 46 3 v 1 2 6 A ug 1 99 7 Colour reconnection and Bose - Einstein effects ∗

Final-state interactions and interference phenomena that could affect the value of the W mass reconstructed from hadronic WW decays at LEP2 are reviewed, and possible areas for future investigation are identified.

ar X iv : h ep - p h / 99 03 52 1 v 1 2 9 M ar 1 99 9 Measurement of R Between 2 - 5 GeV Derrick Kong

We have obtained measurements of the total cross section for e + e − annihilation into hadronic final states for 6 energy points (2.6, 3.2, 2.4, 3.55, 4.6, and 5.0 GeV) with the upgraded Beijing Spectrometer (BESII). We report preliminary values from this data and outline future plans for a finer scan in the 2-5 GeV energy range.

ar X iv : h ep - p h / 99 09 31 7 v 1 1 0 Se p 19 99 LAL 99 - 45 July 1999 AFTER SITGES F . RICHARD

ar X iv : h ep - e x / 99 09 02 3 v 1 1 4 Se p 19 99 Experimental Results on Two - Photon Physics from LEP

This review covers selected results from the LEP experiments on the structure of quasi-real and virtual photons. The topics discussed are the total hadronic cross-section for photon-photon scattering, hadron production, jet cross-sections, heavy quark production for photon-photon scattering, photon structure functions, and crosssections for the exchange of two virtual photons.