ar X iv : h ep - p h / 96 05 45 6 v 2 1 8 Ju l 1 99 6 Polarized Lambdas in the Current Fragmentation Region ∗

ar X iv : h ep - p h / 96 05 45 6 v 1 3 1 M ay 1 99 6 Polarized Lambdas in the Current Fragmentation Region ∗

Data on the nucleon spin structure suggests that the u (and d) quark distributions in the Λ hyperon may be polarized. If this correlation carries over into fragmentation, then the study of polarized Λ's in the current fragmentation region of deep inelastic lepton scattering will be a sensitive probe of nucleon spin structure. Λ production by polarized electrons from unpolarized targets can sear...

ar X iv : h ep - p h / 96 07 45 4 v 1 2 8 Ju l 1 99 6 K ίρκη Version 1 . 0 : Beam Spectra for Simulating Linear Collider

I describe parameterizations of realistic eand γ-beam spectra at future linear ee-colliders. Emphasis is put on simplicity and reproducibility of the parameterizations, supporting reproducible physics simulations. The parameterizations are implemented in a library of distribution functions and event generators. ∗Supported by Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie...

ar X iv : h ep - p h / 96 05 28 2 v 1 1 1 M ay 1 99 6 TWO TOPICS IN PARTICLE - ANTIPARTICLE MIXING

ar X iv : h ep - p h / 96 05 38 4 v 1 2 3 M ay 1 99 6 On dual descriptions of intermittency in a jet ∗

Models of intermittent behaviour are usually formulated using a set of multiplicative random weights on a Cayley tree. However, inter-mittency in particle multiproduction from QCD jets is related to fragmentation of an additive quantum number, e.g. energy-momentum. We exhibit the non-trivial stochastic mapping between these additive and multiplicative cascading processes.

ar X iv : h ep - t h / 96 07 09 3 v 1 1 2 Ju l 1 99 6 Quantum dynamics of N = 1 , D = 4 supergravity compensator