Measurements of branching fraction ratios and CP asymmetries in B[superscript ±]→DCPK[superscript ±] decays in hadron collisions
Author(s)Bauer, Gerry P.; Gomez-Ceballos, Guillelmo; Goncharov, M.; Makhoul, K.; Paus, Christoph M. E.
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Measurements of branching fraction ratios and CP asymmetries in B±→DCPK± decays in hadron collisions
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We reconstruct B[superscript ±]→DK[superscript ±] decays in a data sample collected by the CDF II detector at the Tevatron collider corresponding to 1 fb[superscript -1] of integrated luminosity. We select decay modes where the D meson decays to either K-π+ (flavor eigenstate) or K[superscript -]K[superscript +], π[superscript -]π[superscript +] (CP-even eigenstates), and measure the direct CP asymmetry A[subscript CP+]=0.39±0.17(stat)±0.04(syst), and the double ratio of CP-even to flavor eigenstate branching fractions R[subscript CP+]=1.30±0.24(stat)±0.12(syst). These measurements will improve the determination of the Cabibbo-Kobayashi-Maskawa angle γ. They are performed here for the first time using data from hadron collisions.
DepartmentMassachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Physical Review D
American Physical Society
CDF Collaboration et al. “Measurements of branching fraction ratios and CP asymmetries in B±-->DCPK± decays in hadron collisions.” Physical Review D 81.3 (2010): 031105. © 2010 The American Physical Society
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