abstract: This work presents analysis and results for the NPDGamma experiment, measuring
the spin-correlated photon directional asymmetry in the $\vec{n}p\rightarrow
d\gamma$ radiative capture of polarized, cold neutrons on a parahydrogen
target. The parity-violating (PV) component of this asymmetry
$A_{\gamma,PV}$ is unambiguously related to the $\Delta I = 1$ component of
the hadronic weak interaction due to pion exchange. Measurements in the second
phase of NPDGamma were taken at the Oak Ridge National Laboratory (ORNL)
Spallation Neutron Source (SNS) from late 2012 to early 2014, and then again in
the first half of 2016 for an unprecedented level of statistics in order to
obtain a measurement that is precise with respect to theoretical predictions of
$A_{\gamma,PV}=O(10^{-8})$. Theoretical and experimental background,
description of the experimental apparatus, analysis methods, and results for
the high-statistics measurements are given. / Dissertation/Thesis / Doctoral Dissertation Physics 2017
| Identifer | oai:union.ndltd.org:asu.edu/item:44063 |
| Date | January 2017 |
| Contributors | Blyth, David Cooper (Author), Alarcon, Ricardo O (Advisor), Ritchie, Barry G (Committee member), Comfort, Joseph R (Committee member), Schmidt, Kevin E (Committee member), Arizona State University (Publisher) |
| Source Sets | Arizona State University |
| Language | English |
| Detected Language | English |
| Type | Doctoral Dissertation |
| Format | 137 pages |
| Rights | http://rightsstatements.org/vocab/InC/1.0/, All Rights Reserved |
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