Recherche d'une violation de l'invariance sous le renversement du temps dans la désintégration du neutron

Abstract : The topic of this thesis is the implementation of an experimental setup designed to measure
the R- and N-parameters in polarized neutron decay, together with the data analysis.
Four observables are necessary for this measurement: the neutron polarization, the electron
momentum and both transverse components of the electron polarization. These last
two are measured using a Mott polarimeter. The other observables are determined using
the same detectors. The precision to be reached on the R-parameter is 0.5%. A non
zero value would sign a time reversal invariance violation and therefore would be a hint
of physics beyond the Standard Model. This document firstly presents the work done to
prepare and optimize the experimental setup before the data acquisition run performed
in 2004. Particular care was taken on the scintillator walls, used to trigger the acquisition
and measure the electron energy. The second part concerns the implementation of
methods to extract R and N from the data, and the study of the background recorded
simultaneously.
Document type :
Theses
Complete list of metadatas

Cited literature [27 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00115205
Contributor : Sandrine Guesnon <>
Submitted on : Monday, November 20, 2006 - 3:59:55 PM
Last modification on : Tuesday, February 5, 2019 - 12:12:07 PM
Long-term archiving on : Tuesday, April 6, 2010 - 11:05:52 PM

Identifiers

  • HAL Id : tel-00115205, version 1

Citation

P. Gorel. Recherche d'une violation de l'invariance sous le renversement du temps dans la désintégration du neutron. Physique Nucléaire Théorique [nucl-th]. Université de Caen, 2006. Français. ⟨tel-00115205⟩

Share

Metrics

Record views

274

Files downloads

190