I=1/2 low-lying mesons in lattice QCD

  • Using a conventional constituent-quark model, I=1/2 scalar κ, 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 mκ/mK*(892) is numerically confirmed to apparently vary with quark mass, and the experimental ordering mK*(892) > mκ 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.
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FU Zi-Wen. I=1/2 low-lying mesons in lattice QCD[J]. Chinese Physics C, 2015, 39(8): 083101. doi: 10.1088/1674-1137/39/8/083101
FU Zi-Wen. I=1/2 low-lying mesons in lattice QCD[J]. Chinese Physics C, 2015, 39(8): 083101.  doi: 10.1088/1674-1137/39/8/083101 shu
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Received: 2014-12-05
Revised: 2015-02-05
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I=1/2 low-lying mesons in lattice QCD

    Corresponding author: FU Zi-Wen,

Abstract: Using a conventional constituent-quark model, I=1/2 scalar κ, 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 mκ/mK*(892) is numerically confirmed to apparently vary with quark mass, and the experimental ordering mK*(892) > mκ 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.

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