This is my Ph.D thesis on Radiative B decay searches
(Advisor: Koji Takikawa).

Questions and comments to:
Masashi Tanaka (masa@hep.anl.gov)



We searched for the radiative decays of
Bd -> K*0 gamma, Bs -> Phi Gamma, and Lambda_b -> Lambda Gamma.
The data used in this analysis are collected with the Collider 
Detector at Fermilab (CDF) during 1994--95, corresponding to 
an integrated luminosity of 74 pb^{-1} of p\bar{p} collisions 
at \sqrt{s}=1.8 TeV. In this analysis, the photon is identified 
by an electron-positron pair produced through the external photon 
conversion before the tracking detector volume. One of the conversion 
electrons serves as a trigger for recording the events.
The $B$ hadrons are reconstructed by combining the momenta of the two 
conversion electrons and the two hadron tracks, where the two hadron 
tracks are constrained to intersect at a common point.

We obtained upper limits on the branching fractions for the Bd, Bs, 
and Lambda_b radiative decays  to be 1.9x10^-4, 2.5x10^-4, and 1.3x10^-3
at the 90% confidence level.




Posted to /cdf/pub/thesis/cdf5645_masa_thesis.ps
    http://www-cdf.fnal.gov/thesis/cdf5645_masa_thesis.ps

Posted by masa@cdfsga