Studying high-density baryonic matter at J-PARC Heavy-Ion Project

Sako, Hiroyuki   

J-PARC Heavy-Ion Project (J-PARC-HI) aims at exploring high-baryon density matter in heavy-ion collisions at 1-12 AGeV/c with high-intensity frontier heavy-ion beams. We have designed a heavy-ion acceleration scheme. The heavy-ion beam extracted from MR is transported to the Hadron Experimental Facility to perform the experiment. We will study the properties of the dense matter, explore the phase structures of the QCD phase diagram in a high-baryon density regime. In this presentation, we show the development of the staging plan of the project, where in the first phase we will perform the experiment at the upgraded J-PARC E16 spectrometer with Hz beams, and in the second phase we will perform the experiment at a new large acceptance spectrometer with beams. In particular, we discuss detailed experimental plans with detector upgrades in the first phase such as di-electron and hadron measurements, and the design of a large acceptance spectrometer for event-by-event fluctuations, di-lepton, and heavy flavors in the second phase.