## Studying $κ$ meson with a MILC fine lattice    [PDF]

Ziwen Fu
Using the lattice simulations we measure the point-to-point $\kappa$ correlators in the Asqtad-improved staggered fermion formulation with the sufficiently light $u/d$ quark. We then analyze these correlators using the rooted staggered chiral perturbation theory (rS$\chi$PT). After the chiral extrapolation, we obtain the physical $\kappa$ mass with $835\pm93$ MeV, which is in agreement with the recent BES experimental values. These numerical simulations are carried out with the MILC $N_f=2+1$ flavor fine gauge configurations at a lattice spacing of $a \approx 0.09$ fm.
View original: http://arxiv.org/abs/1305.4458