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  4. Precise measurement of the photon directional asymmetry in the np--d gamma reaction
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Precise measurement of the photon directional asymmetry in the np--d gamma reaction

Full metadata

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.

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
  • Physics
  • Nuclear physics and radiation
  • Hadronic weak interaction
  • parity violation
  • Weak interactions (Nuclear physics)
  • Hadron interactions
  • CP violation (Nuclear physics)
Resource Type
Text
Genre
Doctoral Dissertation
Academic theses
Extent
x, 126 pages : color illustrations
Language
eng
Copyright Statement
In Copyright
Reuse Permissions
All Rights Reserved
Primary Member of
ASU Electronic Theses and Dissertations
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
Note
Partial requirement for: Ph.D., Arizona State University, 2017
Note type
thesis
Includes bibliographical references (pages 115-120)
Note type
bibliography
Field of study: Physics
System Created
  • 2017-06-01 01:32:27
System Modified
  • 2021-08-26 09:47:01
  •     
  • 1 year 9 months ago
Additional Formats
  • OAI Dublin Core
  • MODS XML

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