Measurements of branching fraction ratios and CP asymmetries in B-+/- -> DCPK +/- decays in hadron collisions

Journal article

We reconstruct B±→DK± decays in a data sample collected by the CDF II detector at the Tevatron collider corresponding to 1fb-1 of integrated luminosity. We select decay modes where the D meson decays to either K-π+ (flavor eigenstate) or K-K+, π-π+ (CP-even eigenstates), and measure the direct CP asymmetry ACP+=0.39±0. 17(stat)±0.04(syst), and the double ratio of CP-even to flavor eigenstate branching fractions RCP+=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. © 2010 The American Physical Society.

Authors: Aaltonen, T; Adelman, J; Alvarez Gonzalez, B; Amerio, S; Amidei, D

• Publication status: Published
• Journal: Physical Review D
• Volume: 81
• Issue: 3
• Publication date: 2010-02-01
• DOI: 10.1103/PhysRevD.81.031105
• EISSN: 1550-2368
• ISSN: 1550-7998
• Language: English