Fine structure of the QCD string spectrum.
Fine structure of the QCD string spectrum.
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DOI：
10.1103/physrevlett.90.161601
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发表时间：
2002-07
影响因子：
8.6
通讯作者：
Research Showcase;Cmu;Jimmy Keisuke;Juge;J. Kuti;C. Morningstar
中科院分区：
文献类型：
--
作者：
Research Showcase;Cmu;Jimmy Keisuke;Juge;J. Kuti;C. Morningstar
使用量子色动力学中的先进晶格方法，随着色源分离 R 的变化，在静态夸克-反夸克对周围的胶子场的激发光谱中建立了三个不同的尺度。在最短长度尺度上，激励与由多极算子乘积展开产生的局部胶子场算子创建的状态一致。低于 2 fm 的中间交叉区域通过电平顺序的戏剧性重新排列来确定。在 2-3 fm 的最大长度尺度上，光谱与弦状激励的预期一致。这些能量几乎再现了渐近 pi/R 弦间隙，但表现出精细的结构，为开发有效的玻色弦描述提供了重要线索。
Using advanced lattice methods in quantum chromodynamics, three distinct scales are established in the excitation spectrum of the gluon field around a static quark-antiquark pair as the color source separation R is varied. On the shortest length scale, the excitations are consistent with states created by local gluon field operators arising from a multipole operator product expansion. An intermediate crossover region below 2 fm is identified with a dramatic rearrangement of the level orderings. On the largest length scale of 2-3 fm, the spectrum agrees with that expected for stringlike excitations. The energies nearly reproduce asymptotic pi/R string gaps, but exhibit a fine structure, providing important clues for developing an effective bosonic string description.