2013/10/30 by Chris Michael, C. Michael, Konstantin Ottnad +4
Economics, Econometrics and Finance · Physics and Astronomy · #Diverse academic and cultural studies #High-Energy Particle Collisions Research #Lattice (music) #Lattice QCD #Mixing (physics) #Particle physics #Particle physics theoretical and experimental studies #Physics #Political science #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #hep-lat #hep-ph
paper · pdf · doi:10.1103/physrevlett.111.181602
published as Phys. Rev. Lett. 111, 181602 (2013) · some references added, one typo corrected, matching published version
arxiv created 2013/10/31 · arxiv updated 2013/11/01 · openalex publication_date 2013/11/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/21
We present a lattice QCD computation of η and η' masses and mixing angles, for the first time controlling continuum and quark mass extrapolations. The results for M(η) = 551(8)(stat) (6)(yst) MeV and M(η') = 1006(54)(stat)(38)(syst)(+61)(ex) MeV are in excellent agreement with experiment. Our data show that the mixing in the quark flavor basis can be described by a single mixing angle of Ø = 46(1)(stat)(3)(syst)° indicating that the η' is mainly a flavor singlet state.