Measurements of time-dependent CP asymmetries in B[superscript 0]-->D(*)[superscript +]D(*)[superscript -] decays
Name
Aubert-2009-Measurements of time.pdf
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Author(s)
Zhao, M.
Yamamoto, R. K.
Sciolla, Gabriella
Dujmic, Denis
Cowan, Ray F
Taylor, Frank E
Spitznagel, Michael A
Fisher, Peter H
Alternative Title
Measurements of time-dependent CP asymmetries in B0→D(*)+D(*)- decays
Date Issued
August 2008
Journal
Physical Review D
Publisher
American Physical Society
Version
Final published version
Abstract
We present new measurements of time-dependent CP asymmetries for B[superscript 0]-->D(*)[superscript +]D(*)[superscript -] decays using (467±5)×10[superscript 6] B[bar-over B] pairs collected with the BABAR detector located at the PEP-II B Factory at the Stanford Linear Accelerator Center. We determine the CP-odd fraction of the B[superscript 0]-->D(*)[superscript +]D(*)[superscript -] decays to be R[subscript ⊥]=0.158±0.028±0.006 and find CP asymmetry parameters S[subscript +]=-0.76±0.16±0.04 and C[subscript +]=+0.00±0.12±0.02 for the CP-even component of this decay and S⊥=-1.80±0.70±0.16 and C[subscript ⊥]=+0.41±0.49±0.08 for the CP-odd component. We measure S=-0.63±0.36±0.05 and C=-0.07±0.23±0.03 for B[superscript 0]-->D(*)[superscript +]D(*)[superscript -], S=-0.62±0.21±0.03 and C=+0.08±0.17±0.04 for B[superscript 0]-->D(*)[superscript +]D(*)[superscript -], and S=-0.73±0.23±0.05 and C=+0.00±0.17±0.03 for B[superscript 0]-->D(*)[superscript +]D(*)[superscript -]. For the B0→D*±D∓ decays, we also determine the CP-violating asymmetry A=+0.008±0.048±0.013. In each case, the first uncertainty is statistical and the second is systematic. The measured values for the asymmetries are all consistent with the standard model.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevD.79.032002
