| Lattice calculation of the κ meson |
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| 引用本文： | 傅子文.Lattice calculation of the κ meson[J].中国物理 C,2012,36(6):489-497. |
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| 作者姓名： | 傅子文 |
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| 作者单位： | Key Laboratory of Radiation Physics and Technology (Sichuan University), Ministry of Education; Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China |
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| 基金项目： | Supported by Fundamental Research Funds for Central Universities (2010SCU23002);Startup Grant from the Institute of Nuclear Science and Technology of Sichuan University |
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| 摘 要： | We study the κ meson in 2+1 flavor QCD with sufficiently light u/d quarks. Using numerical simulations, we measure the point-to-point κ correlators in the "Asqtad" improved staggered fermion formulation. We then analyze these correlators using rooted staggered chiral perturbation theory (rSχPT), with particular attention paid to bubble contribution. After chiral extrapolation, we obtain the physical κ mass with 828±97 MeV, which is within the recent experimental value of 800-900 MeV. These numerical simulations are carried out with MILC 2+1 flavor gauge configurations at a lattice spacing of a ≈ 0.12 fm.
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| 关 键 词： | lattice QCD kappa meson chiral extrapolation |
| 收稿时间： | 2011-8-29 |
| 修稿时间： | 2011-10-9 |
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