$p$-adic $L$-functions for ${\rm GSp}(4)\times{\rm GL}(2)$

Abstract: We construct $p$-adic $L$-functions interpolating the critical values of the degree eight $L$-functions of ${\rm GSp}(4)\times {\rm GL}(2)$ for cuspidal automorphic representations generated by $p$-ordinary Siegel modular forms of genus two and $p$-ordinary modular forms.