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Radiative tau production and decay


Wu, Dolly Yu-ting (1990) Radiative tau production and decay. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/dcsz-tr25.


A study of the muon decay channel of the τ lepton with the presence of a photon has been carried out to verify theoretical predictions for the production rate of e+e- → τ+τ-γ and for the branching ratio of τ- → ντ µ-νµγ. Included in this study is the first direct measurement of radiative tau decay. Using e+e- annihilation data taken at 29 GeV center-of-mass energy with the Mark II detector, we find the ratio of the measured τ- → ντ µ-νµγ branching fraction to the expected value from QED to be 1.03 ± 0.42. The ratio of measured-to-predicted number of events from radiative T production, e+e- → τ+τ-γ, where one of the τ's decay to μνν is found to be 0.91 ± 0.20. We have not seen an indication of anomalous behavior in radiative tau events.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Physics
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Barish, Barry C.
Thesis Committee:
  • Unknown, Unknown
Defense Date:24 April 1990
Record Number:CaltechTHESIS:03182015-134751312
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8786
Deposited By: Bianca Rios
Deposited On:18 Mar 2015 21:26
Last Modified:09 Nov 2022 19:20

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