Date of Award

Summer 2000

Document Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Physics

Committee Director

Winston Roberts

Committee Member

Jose Goity

Committee Member

Gilbert Hoy

Committee Member

Anatoly Radyushkin

Committee Member

Linda Vahala

Committee Member

Wallace Van Orden

Abstract

Double pion photoproduction off proton targets is studied, in the framework of an Effective Lagrangian approach at tree level, based on the coupling of photons and pions to nucleons and resonances. We consider N, Δ(1232), N(1440), N(1520) and N(1535) as intermediate baryonic states and ρ-meson as the intermediate 2π resonance. The general form of the amplitude is presented and total cross sections of the γp → π+π− p, γp → π0π0p and γp → π +π0n processes are evaluated up to Eγ = 800 MeV. We fit our theoretical calculation to the experimental data and extract some previously unknown parameters. Furthermore, single pion photoproduction is studied and analysis of the axial anomaly using the γπ+ → π+π 0 reaction near threshold is presented.

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DOI

10.25777/tsnz-2n26

ISBN

9780599965843

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Nuclear Commons

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