Using a conventional constituent-quark model, I = 1/2 scalar K, vector K＊（892）, and axial vector K1 mesons are studied in the asqtad-improved staggered fermion with wall-source and point-sink interpolators. The mas...Using a conventional constituent-quark model, I = 1/2 scalar K, vector K＊（892）, and axial vector K1 mesons are studied in the asqtad-improved staggered fermion with wall-source and point-sink interpolators. The mass ratio of mK/mz＊（892） is numerically confirmed to apparently vary with quark mass, and the experimental ordering mK.（892） 〉 mK holds elegantly when the light u/d quark masses are sufficiently small, while the valence strange quark mass is fixed to its physical value. We also get reasonable signals for the K1 meson suggested by the SCALAR Collaboration from lattice QCD. The computations are conducted with the MILC Nf=3 flavor gauge configurations at three lattice spacings： a≈0.15, 0.12, and 0.09 fm.展开更多
基金Supported by National Natural Science Foundation of China(11175124)National Magnetic Confinement Fusion Program of China(2013GB109000)
文摘Using a conventional constituent-quark model, I = 1/2 scalar K, vector K＊（892）, and axial vector K1 mesons are studied in the asqtad-improved staggered fermion with wall-source and point-sink interpolators. The mass ratio of mK/mz＊（892） is numerically confirmed to apparently vary with quark mass, and the experimental ordering mK.（892） 〉 mK holds elegantly when the light u/d quark masses are sufficiently small, while the valence strange quark mass is fixed to its physical value. We also get reasonable signals for the K1 meson suggested by the SCALAR Collaboration from lattice QCD. The computations are conducted with the MILC Nf=3 flavor gauge configurations at three lattice spacings： a≈0.15, 0.12, and 0.09 fm.
