The lifetimes of the neutral lambda particles and theta-particles

Citation

Strassenburg, Arnold A. (1955) The lifetimes of the neutral lambda particles and theta-particles. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/VBNF-MG96. https://resolver.caltech.edu/CaltechETD:etd-02032004-111841

Abstract

NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document.

The maximum likelihood procedure for determining mean lifetimes of unstable particles is applied to cloud chamber photographs of [...] and [...] particles. Selection methods designed to select pure, unbiased samples are discussed in detail. A formulation of selection criteria which enables optimum use of the data without introducing bias is outlined. The techniques which were employed to make the necessary momentum and distance measurements are described.

The mean lifetime of the [...] based on 93 cases is [...] sec. The mean Q-value for 82 cases which permit a Q-value calculation is [...] Mev. The errors in these results are briefly discussed.

The mean lifetime of the [...] is computed using two independent selection techniques. Biases resulting from anomalous [...] contamination are discussed and a "best value" of [...] sec, based on 60 cases, is given. The errors due to momentum measurements and sample contamination are discussed qualitatively. The mean Q-value for 58 cases is [...] Mev.

Thesis Files