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

FU Zi-Wen

doi:10.1088/1674-1137/39/8/083101

Chinese Physics C> 2015, Vol. 39> Issue(8) : 083101 DOI: 10.1088/1674-1137/39/8/083101

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

FU Zi-Wen ^,

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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 m_κ/m_K^*(892) is numerically confirmed to apparently vary with quark mass, and the experimental ordering m_K^*(892) > m_κ 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 N_f=3 flavor gauge configurations at three lattice spacings: a≈ 0.15, 0.12, and 0.09 fm.

References

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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
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author: FU Zi-Wen,

Received Date: 2014-12-05

Accepted Date: 2015-02-05

Available Online: 2015-08-15

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 m_κ/m_K^*(892) is numerically confirmed to apparently vary with quark mass, and the experimental ordering m_K^*(892) > m_κ 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 N_f=3 flavor gauge configurations at three lattice spacings: a≈ 0.15, 0.12, and 0.09 fm.

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

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