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Measuring the Pion substructure with Radiative Positronic Pion Decays644 views
Author
Alonzi III, Loreto Peter, Department of Physics, University of Virginia
Advisors
Pocanic, Dinko, Department of Physics, University of Virginia
Paschke, Kent, Department of Physics, University of Virginia
Liuti, Simonetta, Department of Physics, University of Virginia
Krushkal, Slava, Department of Mathematics, University of Virginia
Abstract
This dissertation presents an analysis of the PEN data from 2008 searching for the rare decay π + → e + νγ. The region of phase space was E γ > 10MeV and an opening angle of θ eγ > 40 ◦ . The goal was to measure the form factors of the pion, F A and F V . From an observation of 3,884 events we evaluated values of F A = 0.0193 ± 0.008 and F V = 0.0191 ± 0.008. For historical comparison the value of γ ≡ F A /F V was also calculated assuming the Conserved Vector Current hypothesis from the standard model. That produced a result of γ = 0.459±0.057. Both of these results agree with the world experimental average and the standard model within 1σ. The analysis procedure is described in this dissertation along with an in depth treatment of the simulation software produced for the determination of the system acceptance.
Note: Abstract extracted from PDF text
Degree
PHD (Doctor of Philosophy)
Language
English
Rights
All rights reserved (no additional license for public reuse)
Alonzi III, Loreto Peter. Measuring the Pion substructure with Radiative Positronic Pion Decays. University of Virginia, Department of Physics, PHD (Doctor of Philosophy), 2012-05-01, https://doi.org/10.18130/V3FZ68.
