Speaker
Dr
Hiroyuki Sako
(ASRC/J-PARC, Japan Atomic Energy Agency)
Description
We are developing a future heavy-ion program at J-PARC, which is one of the world’s highest intensity proton synchrotrons. In heavy-ion collisions at J-PARC, matter whose density is 8-10 times as high as the normal nuclear density, comparable to that of the neutron star core will be created. There, we aim at exploring QCD phase structures such as the critical point and phase boundaries, and studying modifications of the strong interaction at high baryon density through the investigation of hadron properties and production of exotic hadrons and nuclei.
Ions up to U will be accelerated to 1-19 AGeV ($\sqrt{s_{NN}}=2-6.2$ GeV) at the beam rate up to $10^{11}$ ions per cycle of Main Ring synchrotron (MR). We have designed a heavy-ion acceleration scheme with a new linac and a booster as the injector, combined with the existing 3-GeV Rapid-Cycling Synchrotron (RCS) and 50-GeV MR that have been proven to accelerate high-rate proton beams.
In heavy-ion experiments, we will measure electrons and muons to study the chiral restoration of vector mesons, and the event-by-event fluctuations of conserved charges to search for the critical point in addition to the conventional systematic studies of various hadrons in the wide energy range. We will also measure particle correlations to study the properties of particle interactions. Last but not least, we will also search for exotic hadrons and nuclei such as dibaryons, kaonic nuclei, and measure hypernuclei at high density, which is one of the important topics in hadron physics. We are designing a large acceptance heavy-ion spectrometer based on a Toroidal magnet to measure hadrons, lepton pairs, and event-by-event fluctuations. We are also designing a closed geometry spectrometer to measure hypernuclei to study weak decays and magnetic moments.
In this presentation, the preliminary version of the designed acceleration scheme, as well as the spectrometers and their expected performance and physics results are presented.
| On behalf of collaboration: | [Other] |
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Author
Dr
Hiroyuki Sako
(ASRC/J-PARC, Japan Atomic Energy Agency)
Co-authors
Prof.
Atsushi Sakaguchi
(Osaka University)
Mr
ByunChul Kim
(University of Tsukuba)
Prof.
Hirokazu Tamura
(Tohoku University)
Dr
Hiroshi Masui
(University of Tsukuba (JP))
Dr
Hiroyuki Harada
(J-PARC, Japan Atomic Energy Agency)
Dr
Hitoshi Sugimura
(ASRC, Japan Atomic Energy Agency)
Dr
Jun Tamura
(J-PARC, Japan Atomic Energy Agency)
Dr
Kazuhisa Nishio
(ASRC, Japan Atomic Energy Agency)
Prof.
Kazunori Itakura
(J-PARC, KEK)
Prof.
Ken Oyama
(Nagasaki Inst. of Applied Science (JP))
Prof.
KenIchi Imai
(ASRC/J-PARC, Japan Atomic Energy Agency)
Prof.
Kenta Shigaki
(Hiroshima University)
Dr
Kiyoshi Tanida
(ASRC, Japan Atomic Energy Agency)
Prof.
Kyoichiro Ozawa
(J-PARC, High Energy Accelerator Research Organization)
Dr
Masahiro Okamura
(Brookhaven National Laboratory)
Dr
Masakiyo Kitazawa
(Osaka University)
Dr
Masashi Kaneta
(Tohoku University)
Dr
Michikazu Kinsho
(J-PARC, Japan Atomic Energy Agency)
Dr
Pranab Saha
(J-PARC, Japan Atomic Energy Agency)
Dr
SangHoon Hwang
(ASRC, Japan Atomic Energy Agency)
Prof.
Shinichi Esumi
(University of Tsukuba (JP))
Dr
Shoichi Hasegawa
(ASRC/J-PARC, Japan Atomic Energy Agency)
Prof.
Shoji Nagamiya
(RIKEN, Japan Atomic Energy Agency)
Dr
Takao Sakaguchi
(BNL)
Dr
Taku Gunji
(CNS, University of Tokyo (JP))
Prof.
Tatsuya Chujo
(University of Tsukuba (JP))
Prof.
Yong Liu
(J-PARC, High Energy Accelerator Research Organization)
Dr
Yudai Ichikawa
(ASRC, Japan Atomic Energy Agency)
Dr
susumu sato
(ASRC/J-PARC, Japan Atomic Energy Agency)
