使用非微扰改进clover费米子作用量的激发核子谱
高能物理 - 格点
2012-08-27 v2
摘要
我们讨论了从格点QCD计算中提取负宇称重子质量的问题。使用改进的clover费米子作用量,在淬火格点QCD中计算了最低负宇称态的质量,并发现了与核子质量的分裂。计算在两个格点体积和三个格点间距上进行,从而能够研究有限体积和有限格点间距的不确定性。对核子第一激发径向激发的测量发现其质量远大于负宇称基态的质量,这与其他格点测定一致,但与实验不符。还给出了最轻负宇称态的结果。
引用
@article{arxiv.hep-lat/0112031,
title = {Excited nucleon spectrum using a non-perturbatively improved clover fermion action},
author = {LHPC Collaboration and D. G. Richards and QCDSF Collaboration and : and M. Gockeler and R. Horsley and D. Pleiter and P. E. L. Rakow and G. Schierholz and UKQCD Collaboration and : and C. M. Maynard},
journal= {arXiv preprint arXiv:hep-lat/0112031},
year = {2012}
}
备注
7 pages, 5 figures, uses espcrc2. Talk presented at Workshop on Lattice Hadron Physics, Colonial Club Resort, Cairns, Australia, July 9-18, 2001. Corrected error in determination of mass of excited, positive-parity nucleon resonance