Journal article
Study of B− → DK−π+π− and B− → Dπ−π+π− decays and determination of the CKM angle γ
- 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=(74-19+20)°. This is one of the most precise single-measurement determinations of γ to date.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 734.3KB, Terms of use)
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- Publisher copy:
- 10.1103/PhysRevD.92.112005
Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review D More from this journal
- Volume:
- 92
- Pages:
- 112005-1 - 112005-20
- Publication date:
- 2015-12-17
- DOI:
- ISSN:
-
1550-7998 and 1550-2368
Terms of use
- Copyright holder:
- CERN, for the LHCb Collaboration
- Copyright date:
- 2015
- Notes:
- This article is available under the terms of the Creative Commons Attribution 3.0 License (http://creativecommons.org/licenses/by/3.0/). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
- Licence:
- CC Attribution (CC BY)
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