Exploring dense baryonic matter and multi-strangeness at J-PARC

Abstract

J-PARC is one of the world's highest-intensity proton synchrotron facilities for material and life sciences, neutrino physics, hadron and nuclear physics. By acceleration of heavy-ion beams, J-PARC could also become a high-intensity frontier heavy-ion beam facility (J-PARC-HI). For heavy-ion acceleration, we will build a heavy-ion linac and a booster ring as a compact heavy-ion injector, while we utilize the existing RCS and MR synchrotrons to accelerate 1011 Hz heavy-ion beams at 1–12 AGeV/c. We aim at exploring phase structures of the QCD phase diagram in a high baryon-density regime such as the first-order phase boundary and the QCD critical point, and also aim to search for multi-strangeness systems. We are developing the experimental design for a large acceptance spectrometer. In this work, physics feasibility of J-PARC-HI such as flow and hypernucleus measurements will be shown. Also, a plan to transport heavy-ion beams in the primary proton beamline at Hadron Experimental Facility and an upgrade plan to study heavy-ion collisions at the p+A experiment J-PARC E16 will be presented.