Measurements of Branching Fractions and CP Asymmetries in B-->D0CPK-.
The partial widths of B-->D0(CP)K- decays (D0->K-π+ and D0CP+->K+K-, π+π-) provide a theoretically-clean way of measuring the CKM angle gamma through the so called "GLW method".
This webpage summarizes the results for the measurement
of
R = BR(B-->D0K-) / BR(B-->D0π-)
RCP+ = R+ / R
ACP+ = (BR(B-->D0CP+K-) - BR(B+->D0CP+K+)) / (BR(B-->D0CP+K-) + BR(B+->D0CP+K+))
where R+ = (BR(B-->D0CP+K-) + BR(B+->D0CP+K+)) / (BR(B-->D0CP+π-) + BR(B+->D0CP+π+))
We use 1 fb-1 of data. The results have been blessed at the CDF B-Physics meeting on Thursday October 18, 2007.
Results
R = 0.0745 ± 0.0043 (stat) ± 0.0045 (sys)
RCP+ = 1.57 ± 0.24 (stat) ± 0.12 (sys)
ACP+ = 0.37 ± 0.14 (stat) ± 0.04 (sys)
A complete description of the analysis is available here: note-9109.
Figures
Below the .eps and .gif versions of all figures available for download.
- Data sample
- ptot distributions for B-->D0π- and B-->D0K-
- ptot distribution for the physics background: B-->D*0π-
- ptot distribution for the combinatorial background
- (α,ptot) joint distributions for B-->D0π- and B-->D0K-
- (α,ptot) joint distributions for the physics background B-->D*0π-
(α,ptot) joint distribution for the combinatorial background background
Mass resolution shape parameterizaion
Fit projection, flavor mode (B-->D0π-)
Fit projection, DCP mode (B-->[K K]π-)
Fit projection, DCP mode (B-->[π π]π-)
Comparison with other experiments
Relative Likelihoods plots
