Phenomenological analysis of nucleon strangeness and meson-nucleon sigma terms

Feng Huang, Fu-Guang Cao, Bo-Qiang Ma

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 $\pi$$N$ (${\sigma }_{\pi N}$) and $y_N$, we…