Date of Award

Summer 2001

Document Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Physics

Committee Director

Andreas Klein

Committee Member

David Mack

Committee Member

Gail Dodge

Committee Member

Mark Havey

Committee Member

Linda Vahala

Abstract

Cross sections were measured for the reaction 1H(e, e′π+) n at the energy W = 1.95 GeV and momentum transfer Q2 = 0.6 (GeV/c)2. At this W and Q2, the longitudinal cross section is dominated by t-channel production, giving a unique opportunity to examine the strong coupling form factor gπNN(t). The measured cross sections were separated using a method similar to a Rosenbluth separation. For the extraction of gπNN(t), the Actor and Körner model [42] and a parameterization of the MAID2000 model [3] were employed to fit the longitudinal cross section. Three parameterizations gπNN(t) were used in both models. These fits resulted in a strong coupling constant gπNN[m2π] that is consistent with theoretical predictions. However, this coupling constant leads to a cutoff parameter that is less than 1 GeV.

Rights

In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ 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).

DOI

10.25777/6d27-9n81

ISBN

9780493565903

Download

Included in

Nuclear Commons

Share

COinS