Exchange Mechanism Of Heavy Neutrinos In Neutrinoless Double Beta Decay

At present,we can use the standard model of particle physics to describe beta and dou-ble beta decays with conserved lepton Numbers.If the neutrino were a Majorana Fermion,it would be possible to produce neutrinoless double beta decay with lepton number vio-lation in some nuclei,so we can no longer simply use the Standard model for this phe-nomenon.In this paper,under the framework of the chiral effective theory,we first get the various interaction vertices of neutrinoless double beta decay from the chiral effec-tive Lagrangian,and demonstrate the mechanism of neutrinoless double beta decay heavy neutrino exchange.Secondly we calculate the effective potential of nucleon interaction in neutrinoless double beta decay heavy neutrino exchange.Finally,the calculated effective potential is compared with the neutrino double beta decay in light neutrino exchange.