Doll, David Andrew (2011) Measurement of the rare transition b -> sγ using the complete BABAR data set. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechTHESIS:05312011-194358237
We present the results of a measurement of the total rate and photon energy spectrum in b -> sγ transitions using the entire BABAR data set, 429 fb-1. These results use a "sum of exclusives" approach in which we reconstruct a subset of the final states of the s-quark system and correct for the final states that are missing. We find B(B- -> Xsγ)=(329 ± 19 ± 48)x10-6 for Eγ>1.9 GeV. We also measure the mean and variance of the photon spectrum and find <E>=2.346 ± 0.018+0.027-0.022 and <E2> - <E>2 = 0.0211 ± 0.0057+0.0055-0.0069. Finally we fit two classes of models for the photon spectrum and extract their respective HQET parameters.
|Item Type:||Thesis (Dissertation (Ph.D.))|
|Subject Keywords:||Particle Physics; Flavor Physics; Flavor Changing Neutral Current; Rare Quark Transitions; Rare B Decays|
|Degree Grantor:||California Institute of Technology|
|Division:||Physics, Mathematics and Astronomy|
|Thesis Availability:||Public (worldwide access)|
|Defense Date:||26 May 2011|
|Default Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||David Doll|
|Deposited On:||07 Sep 2012 16:29|
|Last Modified:||26 Dec 2012 04:36|
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