2016/12/14 by V. G. Bornyakov, R. Horsley, Y. Nakamura +7
Physics and Astronomy · #Chiral symmetry breaking #Flavour #Hadron #High-Energy Particle Collisions Research #Isospin #Lattice QCD #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Pseudoscalar #Pseudoscalar meson #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Quark #Strange quark #Symmetry breaking #Valence (chemistry) #hep-lat #hep-ph
paper · pdf · doi:10.1016/j.physletb.2017.02.018
16 pages, 15 figures
arxiv created 2016/12/14 · openalex publication_date 2017/02/14 · arxiv updated 2017/02/22 · openalex created_date 2017/02/24 · openalex updated_date 2026/08/05
The SU(3) flavour symmetry breaking expansion in up, down and strange quark masses is extended from hadron masses to meson decay constants. This allows a determination of the ratio of kaon to pion decay constants in QCD. Furthermore when using partially quenched valence quarks the expansion is such that SU(2) isospin breaking effects can also be determined. It is found that the lowest order SU(3) flavour symmetry breaking expansion (or Gell-Mann-Okubo expansion) works very well. Simulations are performed for 2 + 1 flavours of clover fermions at four lattice spacings.