Measurement of CP Content and Time-Dependent CP Violation in B⁰ → D^*+D^*- Decays

Thesis/Dissertation · Mon Dec 01 04:00:00 EST 2008

DOI:https://doi.org/10.2172/945291· OSTI ID:945291

Anderson, Jacob M. ^[1]

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1. Univ. of Maryland, College Park, MD (United States)

This dissertation presents the measurement of the Cp-odd fraction and time-dependent CP violation parameters for the B⁰ → D^*+ D^*- decay. These results are based on the full BABAR dataset of (467 ± 5) x 10⁶ B$$\bar{B}$$ pairs collected at the PEP-II B Factory at the Stanford Linear Accelerator Center. An angular analysis finds that the CP-odd fraction of the B⁰ →D^*+ D^*- decay is R_{perpendicular} = 0.158 ± 0.028 ± 0.006, where the first uncertainty is statistical, and the second is systematic. A fit to the flavor-tagged, time-dependent, angular decay rate yields C₊ = 0.02 ± 0.12 ± 0.02; C_{perpendicular} = 0.41 ± 0.50 ± 0.08; S₊ = -0.76 ± 0.16 ± 0.04; S _{perpendicular} = -1.81 ± 0.71 ± 0.16, for the CP-odd (perpendicular) and CP-even (plus) contributions. Constraining these two contributions to be the same results in C = 0.047 ± 0.091 ± 0.019; S = -0.71 ± 0.16 ± 0.03. These measurements are consistent with the Standard Model and with measurements of sin2β from B⁰ → (c$$\bar{c}$$)K⁰ decays.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 945291
• Report Number(s): SLAC-R--915
• Country of Publication: United States
• Language: English

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