2009/12/31 by Jérôme Charles, J. Charles, S. Descotes-Genon +7
Physics and Astronomy · #Atomic and Subatomic Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.81.054032
published as Phys.Rev.D81:054032,2010 · 13 pages.
openalex publication_date 2010/03/30 · arxiv created 2010/04/04 · arxiv updated 2010/04/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The charm quark offers interesting opportunities to cross check the mechanism of CP violation precisely tested in the strange and beauty sectors. In this paper, we exploit the angular and quantum correlations in the DD pairs produced through the decay of the \ensuremathψ(3770) resonance in a charm factory to investigate CP-violation in two different ways. We build CP-violating observables in \ensuremathψ(3770)\ensuremath→DD\ensuremath→(V1V2)(V3V4) to isolate specific new physics effects in the charm sector. We also consider the case of \ensuremathψ(3770)\ensuremath→DD\ensuremath→(V1V2)(K\ensuremathπ) decays, which provide a new way to measure the strong phase difference \ensuremathδ between Cabibbo- favored and doubly-Cabibbo suppressed D decays required in the determination of the Cabibbo-Kobayashi-Maskawa quark-mixing matrix angle \ensuremathγ. Neglecting the systematics, we give a first rough estimate of the sensitivities of these measurements at BES-III with an integrated luminosity of 20 fb^\ensuremath-1 at \ensuremathψ(3770) peak and at a future Super \ensuremathτ-charm factory with a luminosity of 1035 cm^\ensuremath-2 s^\ensuremath-1.