Speaker
Hiroyuki Sako
(ASRC/J-PARC, Japan Atomic Research Agency)
Description
In J-PARC, possibility of a future heavy-ion program has been discussed.
There are two physics subjects included in the program. One is a low energy heavy ion physics, to study unstable nuclei with the linac beam at 1-10 AMeV/c, and the other is a high energy heavy ion physics to explore nuclear physics at a high baryon density with the Main Ring beam at 1-10 AGeV/c. In this work, the latter is presented.
We discuss a heavy ion accelerator scheme, physics goals, and an experimental set-up. The accelerator scheme includes a new heavy ion linac, with or without a new heavy ion booster ring, and utilizes the existing 3 GeV Rapid Cycling Synchrotron, and 30 GeV Main Ring.
We focus on studies of dilepton measurements, exotic hadrons such as the H-dibaryon and exotic nuclei such as hypernuclei. The enhancement of dilepton in the low mass region (below rho mass) tens to having a maximum around the J-PARC energies where the highest baryon density coincodes. The yield of hypernuclei has also maximum in this energy region due to coalescence of high density baryons.
We designed a 4-pi acceptance heavy-ion spectrometer which consists of a solenod spectrometer detecting backward hadrons and a dipole spectrometer detecting middle and forward hadrons and leptons. Performance of the spectrometer is evaluated with simulations.
Author
Hiroyuki Sako
(ASRC/J-PARC, Japan Atomic Research Agency)
Co-authors
Dr
Hiroyuki Harada
(J-PARC, Japan Atomic Energy Agency)
Dr
KenIchi Imai
(ASRC/J-PARC, Japan Atomic Energy Agency)
Kenta Shigaki
(Hiroshima University (JP))
Dr
Kyoichiro Ozawa
(J-PARC, KEK)
Dr
Masashi Kaneta
(Tohoku University)
Dr
Pranab Saha
(J-PARC, Japan Atomic Energy Agency)
Prof.
Shoji Nagamiya
(RIKEN)
Takao Sakaguchi
(BNL)
Dr
Taku Gunji
(CNS, University of Tokyo)
Dr
Yong Liu
(J-PARC, KEK)
susumu sato
(jaea)
