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Title: | First observation of D0-D-0 oscillations in D0 →k+π-π+π- decays and measurement of the associated coherence parameters |
Author: | Gascón Fora, David Graciani Díaz, Ricardo Graugés Pous, Eugeni Marin Benito, Carla Picatoste Olloqui, Eduardo Rives Molina, Vicente José Garrido Beltrán, Lluís LHCb Collaboration |
Keywords: | Hadrons Partícules (Física nuclear) Hadrons Particles (Nuclear physics) |
Issue Date: | 17-Jun-2016 |
Publisher: | American Physical Society |
Abstract: | Charm meson oscillations are observed in a time-dependent analysis of the ratio of D0→K+π−π+π− to D0→K−π+π−π+ decay rates, using data corresponding to an integrated luminosity of 3.0 fb−1 recorded by the LHCb experiment. The measurements presented are sensitive to the phase-space averaged ratio of doubly Cabibbo-suppressed to Cabibbo-favored amplitudes rK3πD and the product of the coherence factor RK3πD and a charm mixing parameter y′K3π. The constraints measured are rK3πD=(5.67±0.12)×10−2, which is the most precise determination to date, and RK3πDy′K3π=(0.3±1.8)×10−3, which provides useful input for determinations of the CP-violating phase γ in B±→DK±, D→K∓π±π∓π± decays. The analysis also gives the most precise measurement of the D0→K+π−π+π− branching fraction, and the first observation of D0-¯D0 oscillations in this decay mode, with a significance of 8.2 standard deviations. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.116.241801 |
It is part of: | Physical Review Letters, 2016, vol. 116, num. 24, p. 241801 |
URI: | http://hdl.handle.net/2445/114163 |
Related resource: | https://doi.org/10.1103/PhysRevLett.116.241801 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
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