80 research outputs found
Hyperon Form Factors from N_f=2+1 QCD
We present results from the QCDSF/UKQCD collaboration for the electromagnetic
and semi-leptonic form factors for the hyperons. The simulations are performed
on our new ensembles generated with 2+1 flavours of dynamical O(a)-improved
Wilson fermions. A unique feature of these configurations is that the quark
masses are tuned so that the singlet quark mass is held fixed at its physical
value. We use 5 such choices of the individual quark masses on 24^3x48 lattices
with a lattice spacing of about 0.078 fm.Comment: 7 pages, 6 figures, 1 table. Talk presented at The XXVIII
International Symposium on Lattice Field Theory, Villasimius, Italy, 14-19
June 201
The decay constants and in the continuum limit of domain wall lattice QCD
We present results for the decay constants of the and mesons
computed in lattice QCD with dynamical flavours. The simulations are
based on RBC/UKQCD's domain wall ensembles with both physical and unphysical
light-quark masses and lattice spacings in the range 0.11--0.07fm. We
employ the domain wall discretisation for all valence quarks.
The results in the continuum limit are
and
and
.
Using these results in a Standard Model analysis we compute the predictions
and
for the
CKM matrix elements
- …