Speaker
Dr
Hiroyuki Sako
(Japan Atomic Energy Agency / University of Tsukuba)
Description
In order to explore phase structures in high-baryon density regime of the QCD phase diagram and to study dense quark/hadronic matter which may exist in the core of neutron stars, we proposed a heavy-ion program at J-PARC (J-PARC-HI). In heavy-ion collisions at J-PARC (1-19 AGeV/c), the maximum baryon density will reach 5-10 times the normal nuclear density.
We designed a heavy-ion acceleration scheme at J-PARC. A heavy-ion beam will be produced in a new heavy-ion injector (a linac and a booster ring) and accelerated in the existing 3-GeV and 50-GeV synchrotrons. One of the world’s highest intensity proton accelerator complex J-PARC is expected to produce the world’s highest heavy-ion beams (up to U) of 10^{11} Hz, which provides extremely high rate heavy-ion collisions to measure rare observables in high statistics.
We aim at measuring dileptons (di-electrons and di-muons), photons, higher-order fluctuations of conserved charges, collective flow to explore phase structures, multi-strangeness hadrons and nuclei, and two-particle correlations for physics related to neutron stars.
We designed a multi-purpose large acceptance Toroidal magnet spectrometer for lepton, photon, and hadron measurements. We also designed a spectrometer which measures hadrons and nuclei around beam rapidity region to search for various hypernuclei and strangelets. The latter spectrometer could accept the full beam intensity of J-PARC.
In this talk, physics goals, experimental design of the spectrometers, and expected physics results will be discussed.
Author
Dr
Hiroyuki Sako
(Japan Atomic Energy Agency / University of Tsukuba)
Co-authors
Dr
Hiroyuki Harada
(J-PARC/Japan Atomic Energy Agency)
Prof.
Kyoichiro Ozawa
(J-PARC/High Energy Accelerator Rsearch Organization)
Prof.
Masakiyo Kitazawa
(Osaka University)
Dr
Takao Sakaguchi
(BNL)
