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Showing papers by "Stephen Wolfram published in 1980"


Journal ArticleDOI
TL;DR: In this paper, the Boltzmann equation is used to perform detailed calculations of the time development of such an excess in several simple illustrative models and Complications encountered in applications of the results to specific models are discussed.

341 citations


Journal ArticleDOI
TL;DR: In this article, a Monte Carlo model for the development of parton jets in QCD is described, and explicit low-order calculations are supplemented by leading logarithmic approximations for higher orders.

122 citations


Journal ArticleDOI
TL;DR: In this paper, the development of an excess of baryons over antibaryons due to CP and baryon number violating reactions during the very early stages of the big bang is calculated in simple models using the Boltzmann equation.

44 citations



Journal ArticleDOI
TL;DR: In this article, the structure of hadronic final states in deep inelastic scattering expected from QCD is analyzed in terms of the shape parameters Hl and Cl, and it is shown that the effects of the fragmentation of quarks and gluons into hadrons are typically governed by √s = [Q 2 (1/x−1)] 1 2.

7 citations


Journal ArticleDOI
TL;DR: In this paper, the mean product of energies incident on two or three detectors around e−e− annihilation events is derived as a probe of the QCD structure of the events.
Abstract: Correlations between the energies incident on two or three detectors arounde+e− annihilation events are considered as a probe of the QCD structure of the events. Practical methods for deducing two-detector energy correlations (which give the mean product of energies incident on two detectors as a function of their angular separation) from measured events are devised. Analytical formulae for energy correlations from QCD perturbation theory are given, but it is found that large corrections from hadron formation obscure these symptotic predictions at available energies. Correlations between the final state and the incominge± beam direction are discussed, and observables are presented which measure the angular distributions of planes of final particles with respect to the beam axis (but do not require explicit determination of the planes). Finally, three-detector energy correlatons and their moments are treated, and methods for investigating planar structures ine+e− annihilation events are devised.