Jiangming Yao

According to the mechanism of exchange light Majorana neutrinos, the halflife of neutrinoless DBD can be
factorized as a multiplication of three quantities: the kinematical phase space factor, the effective Majorana
neutrino mass and the nuclear matrix element (NME). Since the phase space factor can be calculated precisely,
a reliable calculation of the NME is highly desired to extract the effective neutrino mass from the measurement
of the decay rate.
Our ongoing project is to achieve an abinitio calculation of the NMEs for the neutrinoless DBD
using the socalled Inmedium SRG method with a RG evolved chiral force.
The multireference wave functions from the GCM calculation
are adopted as the reference states. Many kinds of correlations are included
in the grounstate wave functions. However, there are many challenges to overcome.
Collaborators on this new project:
Prof. Jonathan Engel and Dr. Changfeng Jiao from UNCCH
Prof. Heiko Hergert from MSU