2013/06/05 by LHCb collaboration, R. Aaij, B. Adeva +656 · 2 citations
Physics and Astronomy · #Astrophysics #Asymmetry #CP violation #High-Energy Particle Collisions Research #Luminosity #Particle physics #Particle physics theoretical and experimental studies #Phase (matter) #Physics #Physics beyond the Standard Model #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Standard Model (mathematical formulation) #hep-ex
paper · pdf · doi:10.1103/physrevlett.111.101801
published as Phys. Rev. Lett. 111, 101801 (2013) · 9 pages, 3 figures
arxiv created 2013/06/05 · openalex publication_date 2013/09/03 · arxiv updated 2013/09/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
The charmless decays B^\ifmmode±\else\textpm\fi\ensuremath→K^\ifmmode±\else\textpm\fi\ensuremathπ+\ensuremathπ^\ensuremath- and B^\ifmmode±\else\textpm\fi\ensuremath→K^\ifmmode±\else\textpm\fiK+K^\ensuremath- are reconstructed using data, corresponding to an integrated luminosity of 1.0 fb^\ensuremath-1, collected by LHCb in 2011. The inclusive charge asymmetries of these modes are measured as ACP(B^\ifmmode±\else\textpm\fi\ensuremath→K^\ifmmode±\else\textpm\fi\ensuremathπ+\ensuremathπ^\ensuremath-)=0.032\ifmmode±\else\textpm\fi0.008 (stat)\ifmmode±\else\textpm\fi0.004 (syst)\ifmmode±\else\textpm\fi0.007(J/\ensuremathψK^\ifmmode±\else\textpm\fi) and ACP(B^\ifmmode±\else\textpm\fi\ensuremath→K^\ifmmode±\else\textpm\fiK+K^\ensuremath-)=\ensuremath-0.043\ifmmode±\else\textpm\fi0.009 (stat)\ifmmode±\else\textpm\fi0.003 (syst)\ifmmode±\else\textpm\fi0.007(J/\ensuremathψK^\ifmmode±\else\textpm\fi), where the third uncertainty is due to the CP asymmetry of the B^\ifmmode±\else\textpm\fi\ensuremath→J/\ensuremathψK^\ifmmode±\else\textpm\fi reference mode. The significance of ACP(B^\ifmmode±\else\textpm\fi\ensuremath→K^\ifmmode±\else\textpm\fiK+K^\ensuremath-) exceeds three standard deviations and is the first evidence of an inclusive CP asymmetry in charmless three-body B decays. In addition to the inclusive CP asymmetries, larger asymmetries are observed in localized regions of phase space.