Correction to right-handed currents of neutrinoless double beta decay from the core polarization effects

Nuclear core polarization effect in neutrinoless nuclear double beta decay of 48Ca is discussed. The calculations indicate that in contrast to the effect of either short-range correlation or finite nucleon size, the nuclear core polarization effect causes an enhancement of the total transition matrix element and hence a reduction of the upper limit of either the Majorana neutrino mass mν or the mixture parameter η of the right-handed currents, of about 8%