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Title: | Study of B-→D K-π+π- and B-→D π-π+π- decays and determination of the CKM angle γ |
Author: | Badalov, Alexey Casanova Mohr, R. Garrido Beltrán, Lluís Gascón Fora, David Graciani Diaz, Ricardo Graugés Pous, Eugeni Marin Benito, Carla Picatoste Olloqui, Eduardo Rives Molina, V. Ruiz, Hugo LHCb collaboration |
Keywords: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments |
Issue Date: | 17-Dec-2015 |
Publisher: | American Physical Society |
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 ADS 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 probably value of the weak phase γ corresponds to γ = (74+20 −19) o . This is one of the most precise single-measurement determinations of γ to date. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.92.112005 |
It is part of: | Physical Review D, 2015, vol. 92, num. 112005, p. 1-34 |
URI: | http://hdl.handle.net/2445/186392 |
Related resource: | https://doi.org/10.1103/PhysRevD.92.112005 |
ISSN: | 2470-0010 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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656773.pdf | 1.18 MB | Adobe PDF | View/Open |
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