2026-09-21T05:34:22Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/463862022-01-13T07:54:41Zcom_1721.1_7582com_1721.1_7581col_1721.1_131022
Gabriella Sciolla.
Zhao, Minliang
Massachusetts Institute of Technology. Dept. of Physics.
Massachusetts Institute of Technology. Department of Physics
2009-08-25T18:01:23Z
2009-08-25T18:01:23Z
2008
2008
http://hdl.handle.net/1721.1/46386
427543177
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).
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.
by Minliang Zhao.
Ph.D.
136 leaves
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by
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http://dspace.mit.edu/handle/1721.1/7582
Physics.
Measurement of CP asymmetry in [beta] --> [sigma] [gamma] decays using a sum of exclusive final states
Thesis
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Publication
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