Study of B- -> DK-pi(+)pi(-) and B- -> D pi(-)pi(+)pi(-) decays and determination of the CKM angle gamma
File(s)
Published version
Published version
Author(s)
Type
Journal Article
Abstract
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+20−19)°. This is one of the most precise single-measurement determinations of γ to date.
Date Issued
2015-12-17
Date Acceptance
2015-05-27
Citation
Physical Review D, 2015, 92 (11)
ISSN
1550-7998
Publisher
American Physical Society
Journal / Book Title
Physical Review D
Volume
92
Issue
11
Copyright Statement
© 2015 CERN, for the LHCb Collaboration. Published by the American Physical Society under the terms of
the Creative Commons Attribution 3.0 License. Further distribution
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the published article’s title, journal citation, and DOI.
the Creative Commons Attribution 3.0 License. Further distribution
of this work must maintain attribution to the author(s) and
the published article’s title, journal citation, and DOI.
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Subjects
Science & Technology
Physical Sciences
Astronomy & Astrophysics
Physics, Particles & Fields
Physics
CP-VIOLATION
MODES
PHASE
TOOL
Publication Status
Published
Article Number
112005