中文

pion-核子耦合常数、Goldberger-Treiman 偏差与 $\pi N$ $\sigma$ 项

高能物理 - 唯象学 2007-05-23 v3

摘要

我们首先研究 Goldberger-Treiman 偏差(GTd)Δ=(2.259±0.591)\Delta = (2.259\pm 0.591)%。然后我们考察 πN\pi N σ\sigma 项,其无量纲比值 σN/2mN=3.35\sigma_N/2m_N=3.35%。最后,我们通过夸克模型预测 πN\pi N 耦合常数,当 GTd Δ0\Delta \to 0 时,mqmN/3m_q \to m_N/3

关键词

引用

@article{arxiv.hep-ph/0406009,
  title  = {Pion nucleon coupling constant, Goldberger-Treiman discrepancy and $\pi N$ $\sigma$ term},
  author = {Miroslav Nagy and Michael D. Scadron and Gerald E. Hite},
  journal= {arXiv preprint arXiv:hep-ph/0406009},
  year   = {2007}
}

备注

5 pages, no figures, LaTeX; v2: corrected typo in eq. (6); v3: a discussion concerning chiral perturbation theory, and a co-author added