Lattice2010

Session

Parallel 38: Hadronic structure and interactions

17 Jun 2010, 16:40

Villasimius, Sardinia

223. Two-photon decay of $\pi^0$ from two-flavor lattice QCD

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 ->...

196. Simulations with dynamical HISQ quarks

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...

66. Leading order hadronic contribution to g-2 from twisted mass QCD

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...

135. non-locality of the nucleon-nucleon potential from Lattice QCD

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...