Lattice calculation of $\kappa$ meson

Abstract

We study the $\kappa$ meson in 2+1 flavor QCD with sufficiently light $u/d$ quarks. Using numerical simulation we measure the point-to-point $\kappa$ correlators in the "Asqtad" improved staggered fermion formulation. We analyze those correlators using the rooted staggered chiral perturbation theory (rS$\chi$PT), particular attention is paid to the bubble contribution. After chiral extrapolation, we obtain the physical $\kappa$ mass with $828\pm 97$ MeV, which is within the recent experimental value $800\sim 900$MeV. These numerical simulations are carried out with MILC 2+1 flavor gauge configurations at lattice spacing $a\approx 0.12$ fm.

Accepted in Chinese Physics C

References in corpus (3)

• Scalar Mesons a0(1450) and sigma(600) from Lattice QCD
• Scalar Meson Spectroscopy with Lattice Staggered Fermions
• Tuning Fermilab Heavy Quarks in 2+1 Flavor Lattice QCD with Application to Hyperfine Splittings

Cited by in corpus (8)

• K pi scattering for isospin 1/2 and 3/2 in lattice QCD
• A Review on Partial-wave Dynamics with Chiral Effective Field Theory and Dispersion Relation
• Dispersive $\pi K\to \pi K$ and $\pi \pi \to K\bar{K}$ amplitudes from scattering data, threshold parameters and the lightest strange resonance $\kappa$ or $K_0^{\ast }(700)$
• $I=1/2$ $S$-wave and $P$-wave $K\pi$ scattering and the $\kappa$ and $K^{\ast }$ resonances from lattice QCD
• Preliminary lattice study of $\sigma$ meson decay width
• Studying $\kappa$ meson with a MILC fine lattice
• I=1/2 low-lying mesons in lattice QCD
• Bubble contributions to scalar correlators with mixed actions