We reconstruct B(+/-) -> DK(+/-) decays in a data sample collected by the CDF II detector at the Tevatron collider corresponding to 1 fb(-1) of integrated luminosity. We select decay modes where the D meson decays to either K(-)pi(+) (flavor eigenstate) or K(-)K(+), pi(-)pi(+) (CP-even eigenstates), and measure the direct CP asymmetry A(CP+) = 0.39 +/- 0.17(stat) +/- 0.04(syst), and the double ratio of CP-even to flavor eigenstate branching fractions R(CP+) = 1.30 +/- 0.24(stat) +/- 0.12(syst). These measurements will improve the determination of the Cabibbo-Kobayashi-Maskawa angle gamma. They are performed here for the first time using data from hadron collisions.

T., A., J., A., B. A., G., S., A., D., A., A., A., et al. (2010). Measurements of branching fraction ratios and CP asymmetries in B(+/-) -> D(CP)K(+/-) decays in hadron collisions. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 81, 031105-1-031105-9 [10.1103/PhysRevD.81.031105].

Measurements of branching fraction ratios and CP asymmetries in B(+/-) -> D(CP)K(+/-) decays in hadron collisions

CIOCCI, MARIA AGNESE;
2010-01-01

Abstract

We reconstruct B(+/-) -> DK(+/-) decays in a data sample collected by the CDF II detector at the Tevatron collider corresponding to 1 fb(-1) of integrated luminosity. We select decay modes where the D meson decays to either K(-)pi(+) (flavor eigenstate) or K(-)K(+), pi(-)pi(+) (CP-even eigenstates), and measure the direct CP asymmetry A(CP+) = 0.39 +/- 0.17(stat) +/- 0.04(syst), and the double ratio of CP-even to flavor eigenstate branching fractions R(CP+) = 1.30 +/- 0.24(stat) +/- 0.12(syst). These measurements will improve the determination of the Cabibbo-Kobayashi-Maskawa angle gamma. They are performed here for the first time using data from hadron collisions.
2010
T., A., J., A., B. A., G., S., A., D., A., A., A., et al. (2010). Measurements of branching fraction ratios and CP asymmetries in B(+/-) -> D(CP)K(+/-) decays in hadron collisions. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 81, 031105-1-031105-9 [10.1103/PhysRevD.81.031105].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/35752
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