The influence of δ meson on the isospin splitting of in-medium NN → NΔ cross-sections

The isospin splitting of the in-medium [Formula: see text] cross-sections in asymmetric nuclear medium is investigated in the framework of the one-boson exchange model by including [Formula: see text] and [Formula: see text] mesons. Our results show that the medium correction factors [Formula: see text] have [Formula: see text] and [Formula: see text] by using the without-[Formula: see text] sets. By including the [Formula: see text] meson, there appear the totally opposite results in the [Formula: see text] for different channels, i.e., [Formula: see text] and [Formula: see text].