Full metadata
Title
Precise measurement of the photon directional asymmetry in the np--d gamma reaction
Description
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.
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.
Date Created
2017
Contributors
- Blyth, David (Author)
- Alarcon, Ricardo O (Thesis advisor)
- Ritchie, Barry G. (Committee member)
- Comfort, Joseph R. (Committee member)
- Schmidt, Kevin E (Committee member)
- Arizona State University (Publisher)
Topical Subject
Resource Type
Extent
x, 126 pages : color illustrations
Language
Copyright Statement
In Copyright
Primary Member of
Peer-reviewed
No
Open Access
No
Handle
https://hdl.handle.net/2286/R.I.44063
Statement of Responsibility
by David Blyth
Description Source
Retrieved on Oct. 18, 2017
Level of coding
full
System Created
- 2017-06-01 01:32:27
System Modified
- 2021-08-26 09:47:01
- 2 years 3 months ago
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