$\Sigma^+$ , $\Sigma^0$ and $\Sigma^-$ hyperon production in hadronic Z $^0$ decays

0 Hyperon Polarization in Inclusive Hadronic Production †

A QCD formula for the polarization in the large-pT Λ hyperon production in the unpolarized nucleon-nucleon collision at large xF is derived. We focus on the mechanism in which the chiral-odd spin-independent twist-3 quark distribution EF (x, x) becomes the source of the transversely polarized quarks fragmenting into the polarized Λ. A simple model estimate for that contribution shows the possib...

A Search for Jet Handedness in Hadronic Z 0 Decays

Production of Charged π ± , K ± and p / p̄ in Hadronic Z 0 Decays

We have updated our results on identified charged hadron production using the full SLD data sample of 550,000 hadronic Z 0 decays taken between 1993 and 1998. The SLD Cherenkov Ring Imaging Detector allows the identification of clean samples of charged pions, kaons and protons over a wide momentum range, providing precise tests of perturbative QCD calculations and of fragmentation models. We ha...

Universit . . at Bonn Physikalisches Institut Strange Baryon Production in Hadronic Z 0 Decays

and the three octet baryons have been measured in a sample of 3.65 million hadronic Z 0 decays recorded with the OPAL detector between 1990 and 1994. Results for the integrated and diierential cross-sections as a function of x E are presented and compared with model predictions.

Studies of the Fragmentation Process in Hadronic Decays of Z 0 Boson Studies of the Fragmentation Process in Hadronic Decays of Z 0 Boson

This thesis is based on the work that was done during 1992{1996 at the DELPHI detector at LEP. Its main parts are outlined below. The brief Introduction gives an overview of the science of Particle Physics, its development and contemporary status. The rst chapter represents an introduction to the DELPHI detector at LEP, describing the main features of the LEP machine and the DELPHI detector as ...