Ⅵ. ORGANIZATION AND ACTIVITIES OF RNC

RIKEN Accel. Prog. Rep. 56 (2023)

Subnuclear System Research Division
RIKEN BNL Research Center
1. Abstract

The RIKEN BNL Research Center was established in April 1997 at Brookhaven National Laboratory with Professor T. D. Leeof Columbia University as its initial Director. The Center is dedicated to the study of strong interactions, including spin physics,
lattice QCD and RHIC physics through the nurturing of a new generation of young physicists. Professor Lee was succeeded by BNL
Distinguished Scientist, the former BNL director, N. P. Samios, who served until 2013. The other former BNL director, S. H. Aronson
led the Center from 2013. Hideto En’yo succeeded the director position starting from JFY 2017. Support for RBRC was initiallyfor ﬁve years and has been renewed four times, and presently extends to March 2023. The ﬁve year extension from April 2023 isagreed between BNL and RIKEN in order to cover the era of sPHENIX experiment which is the upgraded of the PHENIX experiment.
Theoretical activities in the RBRC Theory and Computing Groups are closely and intimately related to those of the Nuclear Theory,High Energy Theory and Lattice Gauge Theory Groups at BNL. The RBRC Experimental Group jointly works with RHIC Physics
Research Laboratory at Wako RIKEN, the RHIC Spin Group at BNL, the RHIC Spin Physics community, and the PHENIX/sPHENIX
collaboration. Radiation Laboratory at Wako was closed in March 2022, and its functions are taken over by the new laboratory “RHIC
Physics Research Laboratory” headed by Y. Akiba. BNL provides oﬃce space, management, computing, and administrative support.
The Deputy Director of RBRC is D. Morrison (BNL). In May 2021, Y. Hatta (BNL) becomes Theory Group leader, succeeding
D. Kharzeev. Y. Akiba (RIKEN) is Experimental Group leader and T. Izubuchi (BNL) is Computing Group leader. From April 2023,
Robert Tribble, the former deputy director for Science and Technology of BNL assumes the director of RBRC, after Hideto En’yo’sretirement.

2. Major Research Subjects

Major research subjects of the theory group are(1) Spin structure of proton;(2) Gluon saturation at small-x;(3) Physics of quark gluon plasma.
Major research subjects of the computing group are(1) Search for new law of physics through tests for Standard Model of particle and nuclear physics;(2) Dynamics of QCD and related theories;(3) Theoretical and algorithmic development for lattice ﬁeld theories, QCD machine design.
Major research subject of the experimental group are(1) Experimental Studies of the Spin Structure of the Nucleon;(2) Study of Quark-Gluon Plasma at RHIC;(3) sPHENIX detector construction.

3. Summary of Research Activity

Summary of Research Activities of the three groups of the Center are given in the sections of each group.

Members
Director
Hideto EN’YO
Deputy Director
David P. MORRISONAdministrative Staﬀs
Keiko IWANO (Administration Manager)
Pamela ESPOSITO (Administrative Assistant)

Maureen MCNEIL-SHEA (Administrative Assistant)

List of Publications & Presentations
Publications[Original Papers]
See the lists of the research groups.

Presentations[Seminars]
H. En’yo, “My forty years of looking up to the world of Nambu (in Japanese),” Final lecture supported by the Chief Scientist Assemblyand Nishina Center of RIKEN, Wako, Saitama, Japan (RIKEN) & Online, March 2, 2023.

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RIKEN Accel. Prog. Rep. 56 (2023)

H. En’yo, “My forty years of looking up to the world of Nambu (in English),” the special RBRC Seminar Celebrating the Retirement of
Dr. Hideto En’yo, the director of RIKEN BNL Research Center, Upton NY, USA (Brookhaven National Laboratory) & Online, March23, 2023.

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