Measurements of branching fraction ratios and CP-asymmetries in suppressed B[superscript -]→D(→K[superscript +]π[superscript -])K[superscript -] and B[superscript -]→D(→K[superscript +]π[superscript -])π[superscript -] decays
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Aaltonen-2011-Measurements of branching fraction ratios.pdf
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Author(s)
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Paus, Christoph M. E.
Bauer, Gerry P
Makhoul, Khaldoun
Alternative Title
Measurements of branching fraction ratios and CP-asymmetries in suppressed B-→D(→K+π-)K- and B-→D(→K+π-)π- decays
Date Issued
November 2011
Journal
Physical Review D
Publisher
American Physical Society (APS)
Citation
Aaltonen, T. et al. “Measurements of Branching Fraction Ratios and CP-asymmetries in Suppressed B^{-}→D(→K^{+}π^{-})K^{-} and B^{-}→D(→K^{+}π^{-})π^{-} Decays.” Physical Review D 84.9 (2011): n. pag. Web. 24 Feb. 2012. © 2011 American Physical Society
Version
Final published version
Abstract
We report the first reconstruction in hadron collisions of the suppressed decays B[superscript -]→D(→K[superscript +]π[superscript -])K[superscript -] and B-→D(→K[superscript +]π[superscript -])π[superscript -], sensitive to the Cabibbo-Kobayashi-Maskawa phase γ, using data from 7 fb[superscript -1] of integrated luminosity collected by the CDF II detector at the Tevatron collider. We reconstruct a signal for the B[superscript -]→D(→K[superscript +]π[superscript -])K[superscript -] suppressed mode with a significance of 3.2 standard deviations, and measure the ratios of the suppressed to favored branching fractions R(K)=[22.0±8.6(stat)±2.6(syst)]×10[superscript -3], R[superscript +](K)=[42.6±13.7(stat)±2.8(syst)]×10[superscript -3], R[superscript -](K)=[3.8±10.3(stat)±2.7(syst)]×10[superscript -3] as well as the direct CP-violating asymmetry A(K)=-0.82±0.44(stat)±0.09(syst) of this mode. Corresponding quantities for B-→D(→K[superscript +]π[superscript -])π[superscript -] decay are also reported.
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
https://doi.org/10.1103/PhysRevD.84.091504
