X iv : h ep - t h / 99 09 22 5 v 1 3 0 Se p 19 99 Weak - QES extensions of the Calogero model

X iv : h ep - p h / 99 09 20 5 v 2 2 6 Se p 19 99 On the direct evidence of time - reversal non - invariance in the K 0 − K̄ 0 system

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 - t h / 99 09 21 0 v 1 2 9 Se p 19 99 SPbU - IP - 99 - 11 Casimir - Polder energy and dilute dielectric ball : nondispersive case

We apply general formalism to derive Casimir surface force on a dilute dielectric ball without divergencies in intermediate calculations. The correspondence between the Casimir-Polder formula and Casimir surface force is shown. PACS numbers: 03.70.+k, 11.10.Gh, 12.20.-m, 12.20.Ds, 42.50.Lc E-mail: [email protected]

ar X iv : h ep - p h / 99 09 22 4 v 4 2 8 Se p 19 99 Estimating ε ′ / ε . A user ’ s manual

I review the current theoretical estimates of the CP-violating parameter ε ′ /ε , compare them to the experimental result and suggest a few guidelines in using the theoretical results.

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.