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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

Author(s)
Bauer, Gerry P.; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Makhoul, K.; Paus, Christoph M. E.
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Alternative title
Measurements of branching fraction ratios and CP-asymmetries in suppressed B-→D(→K+π-)K- and B-→D(→K+π-)π- decays
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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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.
Date issued
2011-11
URI
http://hdl.handle.net/1721.1/69195
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
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
ISSN
1550-7998
1089-4918

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