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Parity violation in the hadronic weak interaction

Description
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…

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.
ContributorsBalascuta, Septimiu (Author) / Alarcon, Ricardo (Thesis advisor) / Belitsky, Andrei (Committee member) / Doak, Bruce (Committee member) / Comfort, Joseph (Committee member) / Schmidt, Kevin (Committee member) / Arizona State University (Publisher)
Created2012

Vocal recital

ContributorsKyle, Alison L. (Performer) / LaFrance, Robert (Performer) / Anderton, Ren (Performer) / Schrock, Patricia (Performer) / Morozowicz, Karina (Performer) / Harding, Christian (Performer) / ASU Library. Music Library (Publisher)
Created1994-10-25

Meet me at the stage door

ContributorsShepherd, Tregoney (Performer) / Anderton, Ren (Performer) / ASU Library. Music Library (Publisher)
Created2011-02-23

Vocal recital

ContributorsKyle, Alison L. (Performer) / Anderton, Ren (Performer) / McDougall, Kathy (Performer) / Novak, Kathrine (Performer) / Meisner, Travis Wade (Performer) / ASU Library. Music Library (Publisher)
Created1995-04-19

Dorothy Maddison, soprano

ContributorsMaddison, Dorothy (Performer) / Anderton, Ren (Performer) / Balzi, Mario Andrea (Performer) / Kliewer-Britton, Darleen (Performer) / Hoffer, Warren (Performer) / Doan, Jerry (Performer) / ASU Library. Music Library (Publisher)
Created1999-02-01

Vocal recital

ContributorsDay, Rachel (Performer) / Anderton, Ren (Performer) / Rozukalns, Andris L. (Performer) / Barrett, Leslye (Performer) / Harding, Christian (Performer) / Kingsley, Chiara (Performer) / ASU Library. Music Library (Publisher)
Created1995-10-29

Heidi Yost, soprano

ContributorsYost, Heidi (Performer) / Anderton, Ren (Performer) / Storochuk, Allison (Performer) / Mills, Robert (Performer) / ASU Library. Music Library (Publisher)
Created2000-11-30

Vocal recital

ContributorsTalbot, Gaylin (Performer) / Anderton, Ren (Performer) / Mabee, Candace (Performer) / Winans, Melanie (Performer) / ASU Library. Music Library (Publisher)
Created1994-11-13