Objectives and benefits to the US nuclear physics programs Accomplishments so far Opportunities and Challenges Nuclear Theory Program Division of Nuclear Physics Currently supported by State Key Laboratory of Nuclear Physics & Technology National Laboratory of Heavy-Ion Accelerator Major International Collaboration Project US Perspective Bao-An Li on behalf of the CUSTIPEN Governing Board

George Fai, 2013 Nuclear Theory Program Manager Two currently funded international collaborative programs in nuclear theory: France-U.S. Theory Institute for Physics with Exotic Nuclei (FUSTIPEN) (CUSTIPEN) CUSTIPEN was officially launched on May 1, 2013 at Peking University CUSTIPEN Governing Board Chinese Members: Yugang Ma (Shanghai Institute of Applied Physics) Zhongzhou Ren (Nanjing University) Furong Xu (Managing Director, Peking University) Yanlin Ye (Co-Director, Peking University) Wenlong Zhan (Chinese Academy of Science) Huanqiao Zhang (China Institute of Atomic Energy) Yuhu Zhang (Institute of Modern Physics, CAS) Shangui Zhou (Institute of Theoretical Physics, CAS) U.S. Members: P. Danielewicz (Co-Director, Michigan State University) Bao-An Li (Principal Investigator, Texas A&M-Commerce) W. Nazarewicz (FRIB and Michigan State University) J. Piekarewicz (Florida State University) B. Sherrill (FRIB and Michigan State University).

HIAF/ China FRIB/USA Exotic Nuclei Collaborations are essential to move forward! The complexity of the new problems/challenges require varied expertise, theoretical tools, computing resources, minds, manpower and funding that are hard to find in a single country

CUSTIPEN’s objective: Providing theoretical support in combining American and Chinese nuclear forces to explore a rich menu of compelling science opportunities with exotic nuclei Both countries have invested heavily in radioactive beam facilities and experiments Experiments in both countries need stronger theoretical supports China continuingly provides many high-quality Ph.D students and postdocs in nuclear physics to the USA, CUSTIPEN facilitates continued collaboration of Chinese oversea-returners and their US partners, thus enhance workforce mobility across the pacific ocean More students, postdocs and faculty members paid by China to work in the US, e.g., two nuclear theorists were paid by China Scholarship Council to work at TAMUC last year Better use of Chinese world-leading expertise in certain areas of nuclear theory in understanding US-Lab data: e.g., IQMD analysis of NSCL data on isospin diffusion by the CIAE group (Tsang et al., PRL); RMF analysis of ANL data on chiral doublet bands in 133 Ce by the PKU group (Ayangeakaa et al. PRL), and vice versa, e.g., analyses of IMP data on the masses of exotic nuclei by H. Schatz and Alex Brown (Tu et al. PRL and Zhang et al. PRL) Making use of Chinese world-leading super-computing capabilities Benefits to the US Nuclear Physics Programs --- making better use of Chinese expertise, funding, workforce and computing power

Achievements so far Visits to CUSTIPEN by US-based scientists: 28 person-times during the first 2 years Joint publications acknowledging DOE support for CUSTIPEN: 19 published, several under review and/or in preparation Examples of joint projects: Adaptive multi-resolution 3D Hartree-Fock-Bogoliubov solver, odd-even mass staggering of Sn isotopes, Ab-initio calculations of nuclear structure, modern nuclear forces, nuclear symmetry energy, shear viscosity of neutron-rich matter, neutron-proton effective mass splitting in neutron-rich matter, neutron-skin of heavy nuclei, evaluation of nuclear data, EOS-gravity degeneracy in neutron stars… 9 CUSTIPEN workshops organized in China and USA

6 3D-HFB developments Talks by Junchen Pei and George Fann PRC editor ‘s suggestion USA, Japan, China, UK, France, Italy, Korea, Poland Talk by Zhigang Xiao Several Chinese theorists are making caclualtions relevant for this project ?

Opportunities and Challenges for US-China Collaboration Yes, going well !

8 Identify challenges and opportunities for CUSTIPEN One of the purposes of this workshop 谢谢, thank you all for your Contributions to existing theory programs at FRIB? International Collaboration in Nuclear Theory (ICNT) funded jointly by FRIB/NSCL, GSI and RIKEN in 2013 Theory Alliance for FRIB funded by DOE starting June 2015