Study of Michel spectrum of tau decay
Name
212376069-MIT.pdf
Description
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1.87 MB
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Checksum (MD5)
6c8ca918c33d2bff05215f1f16d53b16
Author(s)
Ackerman, Nicole (Nicole L.)
Advisor(s)
Peter Fisher.
Date Issued
2007
Publisher
Massachusetts Institute of Technology
Abstract
This thesis is the beginning of a larger project to use BaBar to examine weak couplings through leptonic [tau] decay. I will use the ratio of Br... and Br... and the Michel parameters [rho] and [eta]. which describe the momenta spectrum of the daughter leptons. I studied using a simultaneous fit to the [tau] --> e and [tau] --> [mu] momentum spectra, using [rho], [eta], the ratio Br..., and total number of events as the fit variables. I created a simple Monte Carlo simulation which generated a. sample data spectrum and fit it for the Michel parameters [rho] and [eta]. I used the Monte Carlo to assess the impact of the uncertainties in the detector response function on the measurement of the ratio Br... My conclusion is that the three efficiency uncertainties equally have the greatest effect on the measurement of the number of events. The energy offset affects the measurement of Br... and that the energy scale and offset uncertainties have a non-negligible effect on [rho] and [eta].
Description
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2007.
Includes bibliographical references (p. 51-53).
Subjects
Physics.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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