Lattice2010

Session

Parallel 37: Hadronic structure and interactions

17 Jun 2010, 14:30

Villasimius, Sardinia

75. Forces between static-light mesons

Marc Wagner (Humboldt University Berlin)

17/06/2010, 14:30

Hadronic structure and interactions

I report about a computation of the isospin, spin and parity dependent potential between a pair of static-light mesons using Wilson twisted mass lattice QCD with two flavors of degenerate dynamical quarks. From the results a simple rule can be deduced stating, which isospin, spin and parity combinations correspond to attractive and which to repulsive forces.

339. Static-light meson potentials

Martin Hetzenegger (University of Regensburg)

17/06/2010, 14:50

Hadronic structure and interactions

We investigate potentials between pairs of static-light mesons in n_f=2 Lattice QCD, in different spin and isospin channels. The question of attraction and repulsion is particularly interesting with respect to the X(3872) charmonium state and charged candidates such as the Z+(4430). The simulations are performed on QCDSF Sheikholeslami-Wohlert gauge configurations with lattice spacings 0.08 - 0.1 fm.

115. The qbar - q potential from Bethe - Salpeter amplitudes on lattice

Yoichi Ikeda (RIKEN, Nishina Center)

17/06/2010, 15:10

Hadronic structure and interactions

The hadron spectroscopy for mesons including heavy quarks has been continuously studied. Various models with the use of non-relativistic framework for QCD (NRQCD) are applied to the studies of the heavy quark bound systems. The potentials between anti-quarks and quarks are the most important ingredients in models from NRQCD. So far, the static `Qbar-Q' potential with relativistic...

274. Nucleon and N*(1535) Distribution Amplitudes

Rainer Schiel (University of Regensburg, Germany)

17/06/2010, 15:30

Hadronic structure and interactions

The QCDSF collaboration has investigated the distribution amplitudes and wave function normalization constants of the nucleon and its parity partner, the N*(1535). In this talk, I will report on recent progress in the calculation of these quantities. The calculations have been performed on configurations with two dynamical flavors of O(a)-improved Wilson fermions. New data at pion masses of...

246. Spatial diquark correlations in a hadron

Jeremy Green (Center for Theoretical Physics, Massachusetts Institute of Technology)

17/06/2010, 15:50

Hadronic structure and interactions

Using lattice QCD, a diquark can be studied in a gauge-invariant manner by binding it to a static quark in a heavy-light-light hadron. We compute the simultaneous two-quark density of a diquark, including corrections for periodic boundary conditions. We define a correlation function to isolate the intrinsic correlations of the diquark and reduce the effects caused by the presence of the static...