The nucleon-sigma coupling constant in QCD Sum Rules

G. Erkol; Th. A. Rijken; R. G. E. Timmermans

doi:10.1103/PhysRevC.72.035209

The nucleon-sigma coupling constant in QCD Sum Rules

核理论 2008-11-26 v1

作者: G. Erkol , Th. A. Rijken , R. G. E. Timmermans

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摘要

The external-field QCD Sum Rules method is used to evaluate the coupling constant of the light isoscalar-scalar meson (`` $\sigma$ '' or \epsilon) to the nucleon. The contributions that come from the excited nucleon states and the response of the continuum threshold to the external field are calculated. The obtained value of the coupling constant is compatible with the large value required in one-boson exchange potential models of the two-nucleon interaction.

关键词

qcd sum rules qcd coupling constant

引用

@article{arxiv.nucl-th/0603056,
  title  = {The nucleon-sigma coupling constant in QCD Sum Rules},
  author = {G. Erkol and Th. A. Rijken and R. G. E. Timmermans},
  journal= {arXiv preprint arXiv:nucl-th/0603056},
  year   = {2008}
}

备注

11 pages, 4 figures

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