Measurement of the gπNN(t) Form Factor

<p>Cross sections were measured for the reaction ¹<em>H</em>(<em>e, e</em>′π+)<em> n</em> at the energy <em>W</em> = 1.95 GeV and momentum transfer <em>Q</em>² = 0.6 (GeV/c)². At this <em>W</em> and <em>Q</em>², the longitudinal cross section is dominated by t-channel production, giving a unique opportunity to examine the strong coupling form factor <em>g</em>π<em>NN</em>(<em>t</em>). The measured cross sections were separated using a method similar to a Rosenbluth separation. For the extraction of <em>g</em>π<em>NN</em>(<em>t</em>), the Actor and Körner model [42] and a parameterization of the MAID2000 model [3] were employed to fit the longitudinal cross section. Three parameterizations <em>g</em>π<em>NN</em>(<em>t</em>) were used in both models. These fits resulted in a strong coupling constant <em>g</em>π<em>NN</em>[m²π] that is consistent with theoretical predictions. However, this coupling constant leads to a cutoff parameter that is less than 1 GeV.</p>

Name thesis:degree_name

Doctor of Philosophy (PhD)

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Year dc:date.available

2001

Author dc:creator

• Vansyoc, Kelly Gene

Contributors dc:contributor

• Andreas Klein
• David Mack
• Gail Dodge
• Mark Havey
• Linda Vahala

• Pions
• Cross sections
• T-channel
• 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

9780493565903

OAI identifier oai:identifier

oai:digitalcommons.odu.edu:physics_etds-1119