2020/12/31 by LHCb collaboration, R. Aaij, C. Abellán Beteta +967 · 19 citations
Mathematics · Physics and Astronomy · #Asymmetry #Geometry #Isospin #Mathematics #Meson #Neutrino Physics Research #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Symmetry (geometry) #hep-ex
paper · pdf · doi:10.1103/physrevlett.126.091802
published in Physical Review Letters 126(9), 091802 (American Physical Society) · All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2020-040.html (LHCb public pages)
openalex publication_date 2021/03/02 · arxiv created 2021/03/03 · arxiv updated 2021/03/05 · openalex created_date 2021/04/13 · openalex updated_date 2026/08/06
A measurement of CP violation in the decay B+→K+π0 is reported using data corresponding to an integrated luminosity of 5.4 fb-1 collected with the LHCb experiment at a center-of-mass energy of sqrt[s]=13 TeV. The CP asymmetry is measured to be 0.025±0.015±0.006±0.003, where the uncertainties are statistical, systematic, and due to an external input. This is the most precise measurement of this quantity. It confirms and significantly enhances the observed anomalous difference between the direct CP asymmetries of the B0→K+π- and B+→K+π0 decays, known as the Kπ puzzle.