Study of and decays and determination of the CKM angle
Collaboration
20 pages
Published in:
- Phys.Rev.D 92 (2015) 11, 112005
- Published: Dec 17, 2015
e-Print:
- 1505.07044 [hep-ex]
PDG: [ ]
Report number:
- LHCB-PAPER-2015-020,
- CERN-PH-EP-2015-127
Experiments:
Citations per year
Abstract: (APS)
We report a study of the suppressed B-→DK-π+π- and favored B-→Dπ-π+π- decays, where the neutral D meson is detected through its decays to the K∓π± and CP -even K+K- and π+π- final states. The measurement is carried out using a proton-proton collision data sample collected by the LHCb experiment, corresponding to an integrated luminosity of 3.0 fb-1. We observe the first significant signals in the CP -even final states of the D meson for both the suppressed B-→DK-π+π- and favored B-→Dπ-π+π- modes, as well as in the doubly Cabibbo suppressed D→K+π- final state of the B-→Dπ-π+π- decay. Evidence for the suppressed decay B-→DK-π+π-, with D→K+π-, is also presented. From the observed yields in the B-→DK-π+π-, B-→Dπ-π+π- and their charge conjugate decay modes, the most probable value of the weak phase γ corresponds to γ=(74-19+20)°. This is one of the most precise single-measurement determinations of γ to date.Note:
- 22 pages, 9 figures; All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2015-020.html
- 13.25.Hw
- 12.15.Hh
- p p: scattering
- p p: colliding beams
- B-: hadronic decay
- suppression
- meson
- D: decay modes
- rare decay
- CKM matrix
References(60)
Figures(28)
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