Takashi Kaneko
(KEK)
15/06/2010, 14:30
Hadronic structure and interactions
We report on our study of pion and kaon form factors in three-flavor
QCD with dynamical overlap quarks. Connected and disconnected meson
three-point functions are calculated using the all-to-all propagator
on a $16^3 \times 48$ lattice at a lattice spacing of 0.11 fm.
We present preliminary results for the electromagnetic, scalar and
weak decay form factors.
Hartmut Wittig
(University of Mainz)
15/06/2010, 14:50
Hadronic structure and interactions
We present an update on our on-going project to compute hadronic
observables for Nf=2 flacours of O(a) improved Wilson fermions at
small lattice spacings. The procedure to determine the lattice scale
via the mass of the Omega baryon is described. Furthermore we present
preliminary results for the pion form factor computed using twisted
boundary conditions, as well as for the contribution...
Brian Tiburzi
(University of Maryland)
15/06/2010, 15:10
Hadronic structure and interactions
Electromagnetic properties of the nucleon are explored with lattice QCD using a novel technique. Focusing on background electric fields, we show how the electric polarizability can be extracted from nucleon correlation functions. A crucial step concerns addressing contributions from the magnetic moment, which affects the relativistic propagation of nucleons in electric fields. By properly...
Andrei Alexandru
(The George Washington University)
15/06/2010, 15:30
Hadronic structure and interactions
Hadron polarizability are usually measured on the lattice using the
background field method. To create a uniform field one can use either
periodic boundary conditions that force the electromagnetic field to
assume quantized values or Dirichlet boundary conditions where the
field can assume any value but the translational invariance is broken.
In both cases, the energy shifts measured have...
Frank Lee
(George Washington University)
15/06/2010, 15:50
Hadronic structure and interactions
We compute the magnetic moments of negative-parity baryons in the background field method. They are extracted from small mass shifts caused by external magnetic fields introduced on the lattice. The calculations are done on quenched configurations using standard Wilson actions, with pion masses down to about 500 MeV, several field strengths, and high statistics. For comparison purposes, we...
