Neutron Structure Functions Measured with Spectator Tagging

<p>We know much less about the neutron than the proton due to the absence of free neutron targets. Neutron information has to be extracted from data on nuclear targets like deuterium. This requires corrections for off-shell and binding effects which are not known from first principles and therefore are model-dependent. As a consequence, the same data can be interpreted in different ways, leading to different conclusions about important questions such as the value of the d/u quark ratio at large momentum fraction <em>x.</em> The Barely Off-shell NUcleon Structure (BONUS) experiment at Jefferson Lab addressed this problem by tagging spectator protons in coincidence with inelastic electron scattering from deuterium. A novel compact radial time projection chamber was built to detect low-momentum, backward moving protons, ensuring that the scattering took place on a loosely bound neutron. The scattered electron was detected with Jefferson Lab's CLAS spectrometer. Data were taken at beam energies of 2, 4 and 5 GeV. Results on the extracted structure function [special characters omitted] of the neutron, both in the resonance and deep inelastic regions are presented. Dependence of the results on the spectator kinematics, angle and momentum, is investigated. In addition, tests of the spectator model for different angles and momenta are performed.</p>

Name thesis:degree_name

Doctor of Philosophy (PhD)

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Year dc:date.available

2009

Author dc:creator

• Tkachenko, Svyatoslav

Contributors dc:contributor

• Sebastian Kuhn
• John Adam
• Gail Dodge
• Rocco Schiavilla
• Leposava Vuskovic

• Neutron structure
• Spectator protons
• Nuclear

Statement dc:rights

• <p>In Copyright. URI: <a href="http://rightsstatements.org/vocab/InC/1.0/">http://rightsstatements.org/vocab/InC/1.0/</a> This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).</p>

Identifier

9781109706024

OAI identifier oai:identifier

oai:digitalcommons.odu.edu:physics_etds-1086