应稀有同位素前沿科学中心、兰州大学核科学与技术学院邀请，柯美纽斯大学Fedor Šimkovic教授将于2023年11月23日来校进行学术交流并作报告。

       报告题目：Nuclear matrix elements for neutrinoless double-beta decay

       报告时间：2023年11月23日（星期四）15:30    

       报告地点：兰州大学二分部现物楼214室

       欢迎广大师生参加！

【报告摘要】

       Neutrinoless double beta decay (0νββ-decay) is an important probe to study fundamental neutrino properties, e.g., Majorana nature, neutrino masses, CP phases, and non-standard neutrino interactions. The 0νββ-decay nuclear matrix elements (NMEs) are crucial for extracting the neutrino properties from the experimental transition rate. They cannot be measured separately but must be evaluated theoretically. The present-day results obtained in a wide variety of nuclear models are discussed. The subjects of interest are many-body approximations, transition operator’s form, and uncertainty in calculated NMEs. The attention is paid mainly to NMEs associated with light and heavy neutrino mass mechanisms of the 0νββ-decay. A connection between the two-neutrino double beta decay (2νββ-decay) and 0νββ-decay NMEs is addressed. The impact of the quenching of the axial-vector coupling constant on double-beta decay processes is analyzed. The related experimental and theoretical studies of single -decay, 2νββ-decay, muon capture processes, and double-charge exchange nuclear reactions are also addressed.

【报告人简介】

       Professor Fedor Šimkovic got his PhD from Comenius University in Bratislava, Slovakia and Laboratory of theoretical physics JINR Dubna, Russia. After that, he worked as postdoctoral researcher in Tuebingen University, Germany; professors in Comenius University in Bratislava, Slovakia; Main scientist in Laboratory of Theoretical Physics/ JINR Dubna, Russia. Now, he is the professor of Faculty of Mathematics and Physics/ Department of Nuclear Physics, Comenius University in Bratislava and main scientist in Institute of Experimental and Applied Physics CTU in Prague, Czech. In his research, Fedor Šimkovic uses the atomic nucleus as a laboratory to study the fundamental properties of neutrinos. His activities cover the fields of atomic physics, nuclear physics, and particle physics with a touch of astrophysics. In 2020, Fedor Šimkovic became Slovakia's ESET Science Award laureate for Outstanding Scientist. Kip Thorne, the Nobel Prize laureate, headed the decision committee. This award recognizes exceptional individuals of Slovak science who intend to highlight their achievements to the domestic and international communities. He received the PIFI Einstein Scholarship from CAS in 2021.

稀有同位素前沿科学中心

核科学与技术学院

2023年11月25日