Measurement of CP asymmetry in [beta] --> [sigma] [gamma] decays using a sum of exclusive final states

Author(s)
Zhao, Minliang
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Massachusetts Institute of Technology. Dept. of Physics.
Advisor
Gabriella Sciolla.
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Abstract
In this thesis, I describe a study of the CP asymmetry in [beta] --> [sigma] [gamma] decays. This CP asymmetry is expected to be less than 0.01 in the Standard Model, but could be enhanced up to the order of 0.10 by non-Standard Model contributions. We use a sample of 383 x 106 BB events collected by the BABAR detector at the PEP-II asymmetric B factory and reconstruct sixteen flavor-specific B decay modes containing a high energy photon and a hadronic Xs system. We measure the CP asymmetry to be -0.011 ± 0.030stat ± 0.014syst for a photon energy threshold at 1.6 GeV and the hadronic system mass between 0.6 and 2.8 GeV/c2.
Description
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2008.
 
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
 
In title on title page,"[ beta]", "[sigma]" and "[gamma]" appear as lower case Greek letters and "-->" appears as a right arrow.
 
Includes bibliographical references (leaves 133-136).
 
Date issued
2008
URI
http://hdl.handle.net/1721.1/46386
Department
Massachusetts Institute of Technology. Department of Physics
Publisher
Massachusetts Institute of Technology
Keywords
Physics.
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