Toward the excited meson spectrum of dynamical QCD
Toward the excited meson spectrum of dynamical QCD
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DOI：
10.1103/physrevd.82.034508
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发表时间：
2010-04
影响因子：
5
通讯作者：
J. Dudek;R. Edwards;M. Peardon;D. Richards;Christopher E. Thomas
中科院分区：
文献类型：
--
作者：
J. Dudek;R. Edwards;M. Peardon;D. Richards;Christopher E. Thomas
我们提出了一种新的夸克场构造算法和一个大的变分基的运营商的动力学各向异性晶格上的高激发矢量介子谱的提取的详细描述。通过仔细的算子构造，这些技术的组合用于可靠地识别提取状态的连续自旋，克服立方晶格的降低的旋转对称性。激发态，奇异量子数（0+-，1-+和2+-）的状态和高自旋的解决，包括，第一次在晶格QCD计算，自旋四个国家。等矢量介子和K介子谱的测定是在具有两个体积和π介子质量低至~ 400 MeV的动力学晶格上进行的，即使对于高激发态，统计精度通常也在1%或以下。
We present a detailed description of the extraction of the highly excited isovector meson spectrum on dynamical anisotropic lattices using a new quark-field construction algorithm and a large variational basis of operators. With careful operator construction, the combination of these techniques is used to identify the continuum spin of extracted states reliably, overcoming the reduced rotational symmetry of the cubic lattice. Excited states, states with exotic quantum numbers (0+-, 1-+ and 2+-) and states of high spin are resolved, including, for the first time in a lattice QCD calculation, spin-four states. The determinations of the spectrum of isovector mesons and kaons are performed on dynamical lattices with two volumes and with pion masses down to ~ 400 MeV, with statistical precision typically at or below 1% even for highly excited states.