Dirk Pleiter
(DESY)
14/06/2010, 14:30
Hadronic structure and interactions
We present an update on the ongoing efforts of the QCDSF collaboration to compute the nucleon's generalized) form factors and moments of structure functions. The focus will be on our most recent results obtained on gauge configurations where the pseudo-scalar meson mass is in the range of 170-270 MeV. We will compare our results with calculations carried out in chiral effective theories.
Bastian Knippschild
(university of mainz)
14/06/2010, 14:50
Hadronic structure and interactions
Form factors of the nucleon have been extracted from experiment with high precision. However, lattice calculations have failed so far to reproduce the observed dependence of form factors on the momentum transfer. We have embarked on a program to thoroughly investigate systematic effects in lattice calculation of the required three-point correlation functions. In this talk we focus on the...
Saul Cohen
(Boston University)
14/06/2010, 15:10
Hadronic structure and interactions
We report a recent breakthrough in lattice QCD calculations of hadron
form factors at large momentum transfer. Conventional lattice
form-factor calculations typically reach about 2.5 GeV$^2$ or less,
but in this work the transfer momentum is pushed as high as 6 GeV$^2$.
Our approach can be applied to isotropic lattices and lattices with
smaller lattice spacing to calculate even...
Eric Gregory
(University of Cyprus)
14/06/2010, 15:30
Hadronic structure and interactions
We discuss results on the axial and pseudoscalar Delta form factors. We first test the lattice set-up in the quenched approximation and present first results with a hybrid action using a staggered sea and domain-wall valence fermions.
James Zanotti
(University of Edinburgh)
14/06/2010, 15:50
Hadronic structure and interactions
We present results from the QCDSF 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...
