Shell-model studies of medium-heavy nuclei for the neutrinoless-double-beta-decay matrix element and the nuclear Schiff moment

Various search experiments have been performed for new physics beyond the standard model. In these experimental studies, theoretical nuclear structure physics plays an essential role. For example, the nuclear matrix element must be theoretically estimated for the neutrinoless double-beta decay experiments. In this talk, we discuss the neutrinoless-double-beta-decay matrix element of 150Nd and its relation to its nuclear structure, especially to the shape phase transition of the Nd and Sm isotopes, by the large-scale shell-model calculations. We also evaluated the nuclear Schiff moments of 129Xe and 199Hg for the experimental effort to find permanent electric dipole moments. We discuss the nuclear Schiff moment and its relation to the magnetic moment.