David. Maley, Paul
(1992)
A determination of #Delta#(m) from tagged neutral kaons.
PhD thesis, University of Liverpool.
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Abstract
The CPLEAR experiment is a high precision experiment aiming to measure several CP violating parameters in the neutral kaon system. In order to decouple the errors on the phase angles of these parameters with the error on the KL- Ks mass difference (~m), the experiment will also make a measurement of ~m from semileptonic neutral kaon decays. This thesis describes a preliminary determination of ~m from a time dependent asymmetry in the semileptonic decays of tagged KOs and KOs. In order to select a sample of semileptonic decays it was necessary to develop a method of separating electron and pion tracks. The electromagnetic calorimeter can only separate electrons and pions at momenta above 200 MeVIc. In this thesis the development of a method of separating the two types of particle at momenta below 250 MeV[c is also described. From data collected between September 1990 and October 1991, a sample of 45000 semileptonic decays has been isolated and a value of the mass difference determined to be ~mhs = 0.477 ± 0.016(stat.) +-00..000014 } (syst.)
| Item Type: | Thesis (PhD) |
|---|---|
| Depositing User: | Symplectic Admin |
| Date Deposited: | 20 Oct 2023 19:44 |
| Last Modified: | 20 Oct 2023 19:54 |
| DOI: | 10.17638/03175656 |
| Copyright Statement: | Copyright © and Moral Rights for this thesis and any accompanying data (where applicable) are retained by the author and/or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3175656 |
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