Jefferson Laboratory, 12000 Jefferson Avenue, Newport News, Virginia 23606, USA.
Phys Rev Lett. 2009 Dec 31;103(26):262001. doi: 10.1103/PhysRevLett.103.262001.
Using a new quark-field construction algorithm and a large variational basis of operators, we extract a highly excited isovector meson spectrum on dynamical anisotropic lattices. We show how carefully constructed operators can be used to reliably identify the continuum spin of extracted states, overcoming the reduced cubic symmetry of the lattice. Using this method we extract, with confidence, excited states, states with exotic quantum numbers (0+-, 1-+, and 2+-), and states of high spin, including, for the first time in lattice QCD, spin-four states.
我们使用新的夸克场构造算法和一个大的变分算子基，在动力学各向异性格点上提取出高激发的同位旋矢量介子谱。我们展示了如何精心构造算子，以可靠地识别出提取态的连续谱自旋，克服格点的立方对称性的降低。我们使用这种方法，有信心地提取了激发态、具有奇异量子数（0+-, 1-+, 和 2+-）的态，以及高自旋的态，包括在格点 QCD 中首次提取出的自旋为四的态。
