Measurement of the Photon Beam Asymmetry in <i>γP</i> → <i>K</i>⁺Σ⁰ at <i>E_γ</i> = 8.5 GeV with GlueX

<p>In this work the photon beam asymmetry Σ for the reaction <em>γp</em> <em>K</em>⁺ Σ⁰(1193) is measured using the GlueX experiment in Hall D at Jefferson Lab. The analysis used data that were collected using a linearly polarized photon beam in the energy range (8.2 - 8.8) GeV incident on a liquid hydrogen target. The beam asymmetries are measured as a function of the Mandelstam variable<em> t</em> and as a single value for the low <em>u</em> region. These are the first exclusive measurements of the photon beam asymmetry Σ in this reaction at energies above the baryon resonance region. For the <em>t</em>-channel, results are close to unity and show that the reaction is dominated by the natural-parity exchange of the <em>K</em>*(892) Regge trajectory as predicted by theoretical models. A value of Σ = 0.410±0.090 is obtained for the <em>u</em>-channel and suggests the exchange of both Σ(<em>J</em> = 1/2) and <em>Y</em>*(<em>J</em> = 3/2) trajectory contributions to the production of <em>K</em>⁺Σ⁰.</p>

Name thesis:degree_name

Doctor of Philosophy (PhD)

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Year dc:date.available

2020

Author dc:creator

• Wickramaarachchi, Nilanga Indrajie

Contributors dc:contributor

• Moskov Amaryan
• Anatoly Radyushkin
• Stephen Bueltmann
• Alexander Gurevich
• Alvin Holder

• Beam asymmetry
• GlueX
• Elementary Particles and Fields and String Theory
• Optics

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

9798672183503

OAI identifier oai:identifier

oai:digitalcommons.odu.edu:physics_etds-1126