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Title: Measurements of branching fraction ratios and CP-asymmetries in suppressed B-→ D(→ K+π-)K- and B-→ D(→ K+π-- decays

We report the first reconstruction in hadron collisions of the suppressed decays B-→ D(→ K+π-)K- and B-→ D(→ K+π-- decays, sensitive to the CKM phase {gamma}, using data from 7 fb-1 of integrated luminosity collected by the CDF II detector at the Tevatron collider. We reconstruct a signal for the B-→ D(→ K+π-)K- 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)] x 10-3, R+(K) = [42.6 ± 13.7(stat) ± 2.8(syst)] x 10-3, R-(K) = [3.8 ± 10.3(stat) ± 2.7(syst)] x 10-3 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+π-- decay are also reported.
Authors:
 [1]
  1. et al.
Publication Date:
OSTI Identifier:
1023967
Report Number(s):
FERMILAB-PUB--11-404-E-PPD
Journal ID: ISSN 1550-7998; arXiv eprint number arXiv:1108.5765; TRN: US1104640
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 84; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society (APS)
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Contributing Orgs:
CDF Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; DECAY; FERMILAB COLLIDER DETECTOR; FERMILAB TEVATRON; HADRONS; LUMINOSITY Experiment-HEP