*Welcome to [#z2209544]
**Welcome to RCNP Theory Group [#z2209544]

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***What's new [#g8441cd9]



*About us [#t189815f]
**About us [#t189815f]

The purpose of our research is to describe physical phenomena from the microscopic subatomic scale to macroscopic cosmic scale in a unified manner. The current problem is to understand how quarks are confined in hadrons such as mesons and nucleons, and how simple fundamental laws lead to the variety of phenomena we see. 
Our study covers theoretical hadron and nuclear physics:

We believe that the answer lies in understanding (1) how hadrons are formed from quarks and gluons, and (2) how atomic nuclei are formed from the hadrons. They are both difficult problems of the strong interaction. For (1), we use effective models inspired by super-conductivity and string theory, and methods of supercomputer simulations. For (2), we study structure of all nuclei using relativistic mean field method, and by including the force mediated by Yukawa's pion. In particular, Yukawas' force is considered to be the origin of the rich structure of nuclei such as clustering, unstable structure and deformations. In these theoretical researches, we communicate experimental groups of RCNP-Ring cyclotron and of Laser-Electron-Photon at SPring-8.
1.  Structure of hadrons (protons and neutrons) from quarks and gluons
2.  Construct nuclei from protons and neutrons
3.  Understand the origin of elements by high precision nuclear reaction theory

Our aim is to understand the divers phenomena associated with the strong interaction from the microscopic world of quarks for nucleons to macroscopic world including star phenomena.  Quantum chromodynamics confines quarks and breaks chiral symmetry spontaneously, but we do not know their mechanism.  Yukawa's interaction by the pion binds the nucleus, but we still can not solve the problem of nuclear structure.  It is rather recent that we can describe nuclear reactions to clarify how the elements are formed in the history of the universe.  We are approaching these problems by using various methods of theoretical physics of quantum mechanics, relativity and field theory.  

In performing our research, we discuss and collaborate with many physicists from the world.  We also discuss with experimentalists who are working at the RCNP cyclotron, SPring-8, KEK, RIKEN and J-PARC.  

Staff members:
Atsushi Hosaka (Professor), Kazuyuki Ogata (Associate Professor), 
Kanabu Nawa (Postdoc Fellow), Yuma Kikuchi (Postdoc Fellow), 
Kanchan Khemchandani (Postdoc Fellow)
Hideko Nagahiro (Guest Researcher/Nara Women's University), 
Takayuki Myo (Guest Researcher/Osaka Institute of Technology)


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