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Observation of B → K⁰ₛ π⁺ π⁻ and B → K*(892)⁺⁻π⁻⁺ and Measurement of the Charge Asymmetry in B → K*(892)⁺⁻π⁻⁺


Sun, Werner Man-Li (2003) Observation of B → K⁰ₛ π⁺ π⁻ and B → K*(892)⁺⁻π⁻⁺ and Measurement of the Charge Asymmetry in B → K*(892)⁺⁻π⁻⁺. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/B515-7D62.


We report on a search for charmless hadronic B decays to the three-body final states K0Sh+-pi-+, K+-h-+pi0, and K0Sh+-pi0 (h+- denotes a charged pion or kaon), using 9.12 fb-1 of integrated luminosity produced at sqrt{s}=10.58 GeV and collected with the CLEO detector. We observe the decay B -> K0pi+pi- with a branching fraction (50+10-9+-7)x10-6 and the decay B -> K*(892)+-pi-+ with a branching fraction (16+6-5+-2)x10-6, where the uncertainties are statistical and systematic, respectively. Both branching fractions are averages over CP-conjugate states. We also search for a CP-violating asymmetry in the decay B -> K*(892)+-pi-+. We find ACP(B -> K*(892)+-pi-+)=0.26+0.33-0.34+0.10-0.08, giving an allowed interval of [-0.31,0.78] at the 90% confidence level. These measurements are used to constrain fundamental parameters of the Standard Model.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:CP violation; maximum likelihood; rare B decays
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Weinstein, Alan Jay
Thesis Committee:
  • Weinstein, Alan Jay (chair)
  • Hughes, Emlyn Willard
  • Porter, Frank C.
  • Wise, Mark B.
Defense Date:19 May 2003
Non-Caltech Author Email:wms8 (AT)
Record Number:CaltechETD:etd-05202003-230218
Persistent URL:
Sun, Werner Man-Li0000-0003-0649-5086
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1889
Deposited By: Imported from ETD-db
Deposited On:21 May 2003
Last Modified:26 Oct 2021 18:56

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