Eigo Shintani
(RIKEN-BNL)
17/06/2010, 16:40
Hadronic structure and interactions
We discuss chiral and momentum extrapolation of the transition form factor of $\pi^0$ to two-photon using one-loop chiral perturbation theory (ChPT). Fitting the lattice data with the ChPT formula obtained for off-shell photons, we estimate low-energy constants that describe mass and momentum dependence of the $\pi^0$ to two-photon decay, which can be used to estimate the physical $\pi^0 ->...
Doug Toussaint
(University of Arizona)
17/06/2010, 17:00
Hadronic structure and interactions
We study the lattice spacing dependence of physical quantities in
simulations with the HISQ quark action, with four flavors of dynamical
quarks. This study uses runs at several lattice spacings, but with
the light quark mass held fixed at two tenths of the strange quark
mass. We find that the lattice
artifacts in the HISQ simulations are much smaller than those in
the asqtad...
Dru Renner
(NIC, DESY)
17/06/2010, 17:20
Hadronic structure and interactions
The hadronic contributions to the anomalous magnetic moment of the muon are an interesting challenge for lattice QCD calculations, especially given a persistent discrepancy between theory and experiment. We have calculated the leading order hadronic contribution for pion masses from 270 MeV to 600 MeV using two flavors of dynamical twisted-mass fermions. We have examined the finite-size...
Keiko Murano
(High Energy Accelerator Research Organization, KEK)
17/06/2010, 17:40
Hadronic structure and interactions
Recently, a new approach to calculate the nuclear potential from lattice QCD has been proposed. In this approach, the nuclear potential is constructed from Bethe-Salpeter (BS) wave functons through the Schroedinger equation. The procedure leads to non-local but energy independent potential U(r,r'), which can be expressed in terms of local functions by derivative...
