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Iowa State University

1992

High energy physics

Articles 1 - 2 of 2

Full-Text Articles in Physics

A Study Of Isolated Photons In Z0 Hadronic Decays Using The Delphi Detector At Lep , Randall R. Holmes Jan 1992

A Study Of Isolated Photons In Z0 Hadronic Decays Using The Delphi Detector At Lep , Randall R. Holmes

Retrospective Theses and Dissertations

We present a study of the production of energetic isolated photons in the reaction e[superscript]+e[superscript]-→ Z[superscript]0→ q[macron]q[gamma] using the DELPHI detector at LEP. Within the context of the Standard Model, our results for final state radiation show no evidence for anomolous photon production due to rare or new processes. We present a comparison of our data with these theoretical expectations and present upper limits at the 95% CL on the cross section times the branching ratio to hadrons and a photon for the rare or new processes: (1) [sigma](e[superscript]+e ...


Distortions Of Parton Distributions Due To Multiquark Effects , Athanasios Petridis Jan 1992

Distortions Of Parton Distributions Due To Multiquark Effects , Athanasios Petridis

Retrospective Theses and Dissertations

It has been observed that the momentum distributions of partons in bound nuclei are distorted relative to those of free protons and neutrons. This phenomenon was first observed in deep inelastic scattering experiments with muon and neutrino beams on nuclear targets and is known as the EMC effect. Similar phenomena have been observed in other high energy interactions such as the Drell-Yan process, the hadroproduction of direct photons, and the resonance production of charmonium and bottomonium states. In this work we investigate the possibility that these effects are predominantly of partonic origin. Standard nuclear quantum mechanics predicts that there is ...