Phenomenological analysis of nucleon strangeness and meson-nucleon sigma terms
Phenomenological analysis of nucleon strangeness and meson-nucleon sigma terms
We calculate the nucleon strangeness ${y}_{N}$ in the chiral quark model and the meson cloud model. With the internal relation between the sigma term of $\ensuremath{\pi}N$ (${\ensuremath{\sigma}}_{\ensuremath{\pi}N}$) and ${y}_{N}$, we present the results of ${\ensuremath{\sigma}}_{\ensuremath{\pi}N}$ in these two models. Our calculations show that ${y}_{N}$ from the chiral quark model is …