PARITY VIOLATION IN THE HADRONIC WEAK INTERACTION
abstract: This thesis deals with the first measurements done with a cold neutron beam at the Spallation Neutron Source at Oak Ridge National Laboratory. The experimental technique consisted of capturing polarized cold neutrons by nuclei to measure parity-violation in the angular distribution of the...
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2012
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Online Access: | http://hdl.handle.net/2286/R.I.14801 |
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ndltd-asu.edu-item-148012018-06-22T03:02:50Z PARITY VIOLATION IN THE HADRONIC WEAK INTERACTION abstract: This thesis deals with the first measurements done with a cold neutron beam at the Spallation Neutron Source at Oak Ridge National Laboratory. The experimental technique consisted of capturing polarized cold neutrons by nuclei to measure parity-violation in the angular distribution of the gamma rays following neutron capture. The measurements presented here for the nuclei Chlorine ( 35Cl) and Aluminum ( 27Al ) are part of a program with the ultimate goal of measuring the asymmetry in the angular distribution of gamma rays emitted in the capture of neutrons on protons, with a precision better than 10-8, in order to extract the weak hadronic coupling constant due to pion exchange interaction with isospin change equal with one ( hπ 1). Based on theoretical calculations asymmetry in the angular distribution of the gamma rays from neutron capture on protons has an estimated size of 5·10-8. This implies that the Al parity violation asymmetry and its uncertainty have to be known with a precision smaller than 4·10-8. The proton target is liquid Hydrogen (H2) contained in an Aluminum vessel. Results are presented for parity violation and parity-conserving asymmetries in Chlorine and Aluminum. The systematic and statistical uncertainties in the calculation of the parity-violating and parity-conserving asymmetries are discussed. Dissertation/Thesis Balascuta, Septimiu (Author) Alarcon, Ricardo (Advisor) Belitsky, Andrei (Committee member) Doak, Bruce (Committee member) Comfort, Joseph (Committee member) Schmidt, Kevin (Committee member) Arizona State University (Publisher) Nuclear physics Particle physics Physics Aluminum Chlorine gamma rays neutron capture parity violation Weak interaction eng 218 pages Ph.D. Physics 2012 Doctoral Dissertation http://hdl.handle.net/2286/R.I.14801 http://rightsstatements.org/vocab/InC/1.0/ All Rights Reserved 2012 |
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language |
English |
format |
Doctoral Thesis |
sources |
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Nuclear physics Particle physics Physics Aluminum Chlorine gamma rays neutron capture parity violation Weak interaction |
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Nuclear physics Particle physics Physics Aluminum Chlorine gamma rays neutron capture parity violation Weak interaction PARITY VIOLATION IN THE HADRONIC WEAK INTERACTION |
description |
abstract: This thesis deals with the first measurements done with a cold neutron beam at the Spallation Neutron Source at Oak Ridge National Laboratory. The experimental technique consisted of capturing polarized cold neutrons by nuclei to measure parity-violation in the angular distribution of the gamma rays following neutron capture. The measurements presented here for the nuclei Chlorine ( 35Cl) and Aluminum ( 27Al ) are part of a program with the ultimate goal of measuring the asymmetry in the angular distribution of gamma rays emitted in the capture of neutrons on protons, with a precision better than 10-8, in order to extract the weak hadronic coupling constant due to pion exchange interaction with isospin change equal with one ( hπ 1). Based on theoretical calculations asymmetry in the angular distribution of the gamma rays from neutron capture on protons has an estimated size of 5·10-8. This implies that the Al parity violation asymmetry and its uncertainty have to be known with a precision smaller than 4·10-8. The proton target is liquid Hydrogen (H2) contained in an Aluminum vessel. Results are presented for parity violation and parity-conserving asymmetries in Chlorine and Aluminum. The systematic and statistical uncertainties in the calculation of the parity-violating and parity-conserving asymmetries are discussed. === Dissertation/Thesis === Ph.D. Physics 2012 |
author2 |
Balascuta, Septimiu (Author) |
author_facet |
Balascuta, Septimiu (Author) |
title |
PARITY VIOLATION IN THE HADRONIC WEAK INTERACTION |
title_short |
PARITY VIOLATION IN THE HADRONIC WEAK INTERACTION |
title_full |
PARITY VIOLATION IN THE HADRONIC WEAK INTERACTION |
title_fullStr |
PARITY VIOLATION IN THE HADRONIC WEAK INTERACTION |
title_full_unstemmed |
PARITY VIOLATION IN THE HADRONIC WEAK INTERACTION |
title_sort |
parity violation in the hadronic weak interaction |
publishDate |
2012 |
url |
http://hdl.handle.net/2286/R.I.14801 |
_version_ |
1718699565637435392 |