Updated analysis of meson-nucleon sigma terms in the perturbative chiral quark model
High Energy Physics - Phenomenology
2007-05-23 v2
Abstract
We present an updated analysis of meson-baryon sigma terms in the perturbative chiral quark model, which is based on effective chiral Lagrangian. The new feature concerns the inclusion of excited states in the quark propagator. Its influence on meson loops is shown to lead in particular for the pion-nucleon sigma term to an enhancement relevant for the current evaluation of this quantity. We also determine various flavor combinations of the scalar nucleon form factors and their respective low-momentum transfer limits.
Keywords
Cite
@article{arxiv.hep-ph/0311275,
title = {Updated analysis of meson-nucleon sigma terms in the perturbative chiral quark model},
author = {T. Inoue and V. E. Lyubovitskij and Th. Gutsche and Amand Faessler},
journal= {arXiv preprint arXiv:hep-ph/0311275},
year = {2007}
}
Comments
26 pages, 10 figures, to be published in Phys Rev C