Scalar meson spectroscopy with a fine lattice

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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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Scalar meson spectroscopy with a fine lattice

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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