Scalar meson spectroscopy with a fine lattice

FU Zi-Wen; Carleton DeTar

doi:10.1088/1674-1137/35/10/002

Chinese Physics C> 2011, Vol. 35> Issue(10) : 896-901 DOI: 10.1088/1674-1137/35/10/002

Scalar meson spectroscopy with a fine lattice

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Abstract：
With sufficiently light u and d quarks the isovector (a₀) and isosinglet (f₀) scalar meson propagators are dominated at large distances by two-meson states. In the staggered fermion formulation of lattice QCD, taste-symmetry breaking causes a proliferation of multihadron states that complicates the analysis of these channels. Of special interest is the bubble contribution, which makes a considerable contribution to these channels. Using numerical simulation we have measured the correlators for both a₀ and f₀ channels in the “Asqtad” improved staggered fermion formulation in a MILC fine (a=0.09 fm) lattice ensemble. We analyze those correlators using rooted staggered chiral perturbation theory (rSχPT) and achieve chiral couplings that are well consistent with previous determinations.

References

[1]

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FU Zi-Wen and Carleton DeTar. Scalar meson spectroscopy with a fine lattice[J]. Chinese Physics C, 2011, 35(10): 896-901. doi: 10.1088/1674-1137/35/10/002

FU Zi-Wen and Carleton DeTar. Scalar meson spectroscopy with a fine lattice[J]. Chinese Physics C, 2011, 35(10): 896-901. doi: 10.1088/1674-1137/35/10/002 shu

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Received: 2010-12-08
Revised: 2011-01-06

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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

Scalar meson spectroscopy with a fine lattice

Received Date: 2010-12-08

Accepted Date: 2011-01-06

Available Online: 2011-10-05

Abstract: With sufficiently light u and d quarks the isovector (a₀) and isosinglet (f₀) scalar meson propagators are dominated at large distances by two-meson states. In the staggered fermion formulation of lattice QCD, taste-symmetry breaking causes a proliferation of multihadron states that complicates the analysis of these channels. Of special interest is the bubble contribution, which makes a considerable contribution to these channels. Using numerical simulation we have measured the correlators for both a₀ and f₀ channels in the “Asqtad” improved staggered fermion formulation in a MILC fine (a=0.09 fm) lattice ensemble. We analyze those correlators using rooted staggered chiral perturbation theory (rSχPT) and achieve chiral couplings that are well consistent with previous determinations.

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Scalar meson spectroscopy with a fine lattice

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