Measurement of Time-Dependent CP Asymmetries and the CP-Odd Fraction in the Decay B0 -> D*+D*-

Technical Report · Thu Jun 26 04:00:00 EDT 2003

DOI:https://doi.org/10.2172/815290· OSTI ID:815290

Lillard, Vincent A ^[1]

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1. SLAC

We present a measurement of time-dependent CP asymmetries and an updated determination of the CP-odd fraction in the decay B{sup 0} {yields} D*{sup +}D*{sup -} using a data sample of 88 x 10{sup 6} B{bar B} pairs collected by the BABAR detector at the PEP-II B Factory at SLAC. We determine the CP-odd fraction to be 0.063 {+-} 0.055(stat) {+-} 0.009(syst). The time-dependent CP asymmetry parameters Im({lambda}{sub +}) and |{lambda}{sub +}| are determined to be 0.05 {+-} 0.29(stat) {+-} 0.10(syst) and 0.75 {+-} 0.19(stat) {+-} 0.02(syst), respectively. The Standard Model predicts these parameters to be -sin2{beta} and 1, respectively, in the absence of penguin diagram contributions.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 815290
• Report Number(s): SLAC-PUB-9986
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ASYMMETRY
DECAY
STANDARD MODEL
STANFORD LINEAR ACCELERATOR CENTER