强同位旋破缺效应的格点QCD计算
高能物理 - 格点
2012-03-05 v2
摘要
我们提出一种新方法，利用格点QCD高精度计算由上、下夸克质量差导致的同位旋破缺效应。我们的方法原则上适用于任何可在格点上计算的强子观测量。它基于路径积分在小参数的幂次展开。在本报告中，我们讨论如何应用该方法计算几个感兴趣的物理量的领头阶同位旋破缺效应: 介子质量、介子衰变常数和中子-质子质量劈裂。
引用
@article{arxiv.1202.5222,
title = {Lattice QCD calculation of strong isospin breaking effects},
author = {G. M. de Divitiis and P. Dimopoulos and R. Frezzotti and V. Lubicz and G. Martinelli and R. Petronzio and G. C. Rossi and F. Sanfilippo and S. Simula and N. Tantalo and C. Tarantino},
journal= {arXiv preprint arXiv:1202.5222},
year = {2012}
}
备注
7 pages, 3 figures. Talk presented at the XXIX International Symposium on Lattice Field Theory - Lattice 2011, July 10-16, 2011, Squaw Valley, Lake Tahoe, California. Typo corrections, accepted version