Speaker
Dr
Roger Horsley
(University of Edinburgh)
Description
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 (Gell-Mann-Okubo) works very well. Simulations are
performed for 2+1 flavours of clover fermions at 4 lattice spacings.
Author
Dr
Roger Horsley
(University of Edinburgh)
