3 research outputs found
Lattice study of "f(600) or "
We investigate the propagator of "f(600) or the " by the
full-QCD simulation with Wilson fermions. We calculate the mesonic correlator
in the I=0, channel on the lattice. Plaquet
action and Wilson fermion action are adopted. A coupling constant is
set to 4.8 and three kinds of hopping parameter, =0.1846, 0.1874 and
0.1891 are assayed. The disconnected diagram in the propagator is evaluated
through taking average over 500 or 1000 Z2 noise. Simulations with the larger
hopping parameter provide us with less noisy results. Though the statistics is
not yet enough, our results indicate the existence of a pole with a mass in
almost the same order as that of the .Comment: Talk given at 20th International Symposium on Lattice Field Theory
(LATTICE 2002), Boston, Massachusetts, 24-29 Jun 200
Lattice Study of Low-lying Nonet Scalar Mesons in Quenched Approximation
Using lattice QCD simulation in the quenched approximation, we study the
meson, which is ^3P_0 in the quark model, and compare experimental and
other lattice data. The is the lowest scalar meson with strangeness
and constitutes the scalar nonet. The obtained mass is much higher than the
recent experimental value, and therefore the is difficult to
consider as a simple two-body constituent-quark structure, and may have another
unconventional structure.Comment: 11pages, 5figure