2013/01/01 by A. Di Canto, Angelo Di Canto
Physics and Astronomy · #Astrophysics #Atmospheric sciences #CP violation #Cabibbo–Kobayashi–Maskawa matrix #Charm (quantum number) #Galaxy #High-Energy Particle Collisions Research #Luminosity #Mixing (physics) #Mixing ratio #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #hep-ex
paper · pdf · doi:10.1051/epjconf/20134913009
5 pages, 6 figures, 2 tables. Proceedings of HCP 2012
openalex publication_date 2013/01/01 · arxiv created 2013/02/12 · arxiv updated 2015/06/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report a measurement of the time-dependent ratio of D0 → K+π− to D0 → K−π+ decay rates in D*+-tagged events using 1.0 fb−1 of integrated luminosity recorded by the LHCb experiment. We measure the mixing parameters x′2 = (−0.9 ± 1.3) × 10−4, y′ = (7.2 ± 2.4) × 10−3 and the ratio of doubly-Cabibbo-suppressed to Cabibbo-favored decay rates RD = (3.52 ± 0.15) × 10−3. The result excludes the no-mixing hypothesis with a probability corresponding to 9.1 standard deviations and represents the first observation of charm mixing from a single measurement.