西南大学尧江明教授学术报告

题目：

Multireference covariant density functional theory for the nuclear matrix elements of neutrinoless double beta decay

摘要：Since the discovery of neutrino oscillations, the search for 0νββ decay has attracted lots of renewed interests in nuclear and particle physics. The worldwide set of double-beta-decay measurements running, under construction, and planned for the near future represents “current generation experiments”, approaching the half-lives of the 0νββ decay about 10^26 years. In particular, it is expected that these will lead to one or more “next generation”experiments which should have sufficient sensitivity to, with high confidence level, resolve the issue of Majorana vs. Dirac nature of neutrinos for the so-called “inverted hierarchy” of neutrino mass values. However, the large uncertainties in the nuclear matrix elements governing this process will translate into the effective neutrino mass and thus complicate the situation. Therefore, lots of theoretical efforts from nuclear physics are being devoted into reducing these uncertainties to be as small as possible. In this talk, I may review briefly the research background of the 0νββ decay. In particular, I may introduce in detail the first full relativistic calculation of the nuclear matrix elements for this process based on the mechanism of exchange either light or heavy neutrinos within the framework of multi-reference covariant density functional theory. Finally, I will end my talk by introducing briefly the project that we are working on,namely ab-initio calculation of the nuclear matrix elements for the 0νββ decay with the multi-reference in-medium similarity renormalization group method.

报告时间：2016年10月12日 （星期三）下午4:00

报告地点：物理馆103