2010/05/31 by The BABAR Collaboration, P. del Amo Sanchez, J. P. Lees +98
Medicine · Physics and Astronomy · #Dalitz plot #Energy (signal processing) #Medical Imaging Techniques and Applications #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Production (economics) #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #hep-ex
paper · pdf · doi:10.1103/physrevlett.105.121801
published as Phys.Rev.Lett.105:121801,2010 · 7 pages, 2 postscript figures, 2 tables, appendix with 4 pages containing supplementary material, submitted to Phys. Rev. Lett
openalex publication_date 2010/09/16 · arxiv created 2010/09/24 · arxiv updated 2010/09/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report the measurement of the Cabibbo-Kobayashi-Maskawa CP-violating angle \ensuremathγ through a Dalitz plot analysis of neutral D-meson decays to KS0\ensuremathπ+\ensuremathπ^\ensuremath- and KS0K+K^\ensuremath- produced in the processes B^\ensuremath∓\ensuremath→DK^\ensuremath∓, B^\ensuremath∓\ensuremath→D*K^\ensuremath∓ with D*\ensuremath→D\ensuremathπ0, D\ensuremathγ, and B^\ensuremath∓\ensuremath→DK^*\ensuremath∓ with K^*\ensuremath∓\ensuremath→KS0\ensuremathπ^\ensuremath∓, using 468 million BB pairs collected by the BABAR detector at the PEP-II asymmetric-energy e+e^\ensuremath- collider at SLAC. We measure \ensuremathγ=(68\ifmmode±\else\textpm\fi14\ifmmode±\else\textpm\fi4\ifmmode±\else\textpm\fi3)\ifmmode^∘\else\textdegree\fi (modulo 180\ifmmode^∘\else\textdegree\fi), where the first error is statistical, the second is the experimental systematic uncertainty, and the third reflects the uncertainty in the description of the neutral D decay amplitudes. This result is inconsistent with \ensuremathγ=0 (no direct CP violation) with a significance of 3.5 standard deviations.