Open Access. Powered by Scholars. Published by Universities.®

Physics Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 3 of 3

Full-Text Articles in Physics

Qcd Near The Light Front , Thomas John Fields Jan 1996

Qcd Near The Light Front , Thomas John Fields

Retrospective Theses and Dissertations

In this thesis, we propose a set of techniques to study the non-perturbative behavior of quantum field theories. These techniques include the use of near light front coordinates and a theory of effective Hamiltonians;Our ultimate goal will be to apply these methods to quantum electrodynamics (QED) and quantum chromodynamics (QCD). As a first test we will investigate simplified versions of QED and QCD with these methods over all ranges or their coupling constants;First, we solve the Schwinger model, which is QED in one space and one time dimension. We use this test model in both the massless and ...


Direct Photon Production In A Nuclear Environment , Xiaofeng Guo Jan 1996

Direct Photon Production In A Nuclear Environment , Xiaofeng Guo

Retrospective Theses and Dissertations

The photon is a very good probe of short distance physics in strong interactions. It can be produced directly at short-distance or through fragmentation processes. Through one-loop order in perturbation theory of quantum chromodynamics (QCD), this thesis provides complete analytic expressions for both the inclusive and the isolated prompt photon production cross sections in hadronic final states of e+e- annihilations. It is the first time that the full angular dependence of the cross sections is derived. Extraction of photon fragmentation functions from e+e- annihilations is addressed. Using e+e-→[gamma]+X as an example, this work demonstrates for ...


Electromagnetic Dissociation Of Co And Au Targets By A 10.2 Gev/Nucleon Au Beam , Lars Albert Ewell Jan 1996

Electromagnetic Dissociation Of Co And Au Targets By A 10.2 Gev/Nucleon Au Beam , Lars Albert Ewell

Retrospective Theses and Dissertations

Collisions of relativistic heavy ions (RHI) can be broadly categorized as two types: central (nuclear force dominated) and peripheral (coulomb force dominated). The experiment described addresses the latter. Unlike the neutron removal cross section via the nuclear force [sigma]nucl, the neutron removal cross section via the coulomb force [sigma]coul is an increasing function of energy due to the Lorentz contraction of the electromagnetic fields. As more energetic and heavier (higher Z) RHI beams have become available, there appears to be an overestimation of the one neutron removal cross section by the virtual photon theoretical treatment of Wiezsacker, Williams ...