J-PARC heavy ion experiment

Author(s):  
Takashi Hachiya

J-PARC Heavy Ion project (J-PARC-HI) is a future fixed target experiment to study the properties of the dense matter created by the heavy-ion collisions with 1–12[Formula: see text]AGeV/[Formula: see text] at J-PARC. This project aims to search for the QCD phase boundary and its critical endpoint and to study the equation of state of the dense matter at J-PARC. For this purpose, the high-intensity beam and the precision detector with high-speed DAQ are necessary. J-PARC will be upgraded to produce the world’s highest intensity of heavy-ion beam by adding a new compact heavy-ion linac and a booster ring and utilizing the existing RCS and MR synchrotrons. We will construct the multi-purpose spectrometer with a large acceptance to measure hadrons, dileptons and photons, and their correlations and fluctuations. In these proceedings, we will report the current status of the project, the design of the detector configuration, and detector R&D.

2019 ◽  
Vol 204 ◽  
pp. 07009 ◽  
Author(s):  
A. Galavanov ◽  
M. Kapishin ◽  
K. Kapusniak ◽  
V. Karjavine ◽  
S. Khabarov ◽  
...  

BM@N (Baryonic Matter at the Nuclotron) is a fixed target experiment aimed to study nuclear matter in the relativistic heavy-ion collisions at the Nuclotron accelerator in JINR. The BM@N tracking system is based on Gas Electron Multipliers (GEM) detectors mounted inside the BM@N analyzing magnet. The Cathode Strip Chamber (CSC) is installed outside the magnet. The CSC is used for improvement of particles momentum identification. The structure of the GEM detectors and the CSC prototype and the results of study of their characteristics are presented. The GEM detectors and CSC are integrated into the BM@N experimental setup and data acquisition system. The results of first tests of the GEM tracking system and CSC in last runs are shortly reviewed.


2018 ◽  
Vol 177 ◽  
pp. 04004
Author(s):  
Sergei Bazylev ◽  
Mikhail Kapishin ◽  
Kacper Kapusniak ◽  
Vladimir Karjavine ◽  
Sergei Khabarov ◽  
...  

BM@N is the fixed target experiment at the accelerator complex NICA-Nuclotron aimed to study nuclear matter in the relativistic heavy ion collisions. Triple-GEM detectors were identified as appropriate for the BM@N tracking system located inside the analyzing magnet. Seven GEM chambers are integrated into the BM@N experimental setup and data acquisition system. GEM construction, main characteristics and first obtained results of the GEM tracking system performance in the technical run with the deuteron beam are shortly reviewed.


2018 ◽  
Vol 182 ◽  
pp. 02061 ◽  
Author(s):  
Mikhail Kapishin

BM@N (Baryonic Matter at Nuclotron) is the first experiment to be realized at the accelerator complex of NICA-Nuclotron. The aim of the BM@N experiment is to study interactions of relativistic heavy ion beams with fixed targets. The BM@N setup, results of Monte Carlo simulations, the BM@N experimental program and results of technical runs are presented.


2018 ◽  
Vol 171 ◽  
pp. 16006
Author(s):  
Michał Naskręt

NA61/SHINE is a large acceptance fixed target experiment at the CERN SPS which studies final hadronic states in interactions between various particles and nuclei [1]. The main topic of this contribution are preliminary results for mean negatively charged pion multiplicities 〈π−〉 from central Ar+Sc and Be+Be collisions. The data were taken recently by the NA61/SHINE collaboration for a wide range of beam momenta. Measured rapidity distributions [see formula in PDF] were extrapolated to unmeasured regions to obtain total multiplicities 〈π−〉 A new scheme to calculate the mean number of wounded nucleons 〈W〉 utilizing the EPOS MC model is described. Using data from other experiments, a comparison of [see formula in PDF]for different collisions and beam momenta is discussed.


2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Daniel Kikoła

High luminosity data in a fixed-target experiment allow studying interactions of heavy quarks with nuclear matter in the intermediate energy range with extremely high precision. We present a feasibility study for open charm and bottom production measurements in the energy range of a fixed-target experiment at the LHC (AFTER@LHC). We demonstrate, that high-precision data from AFTER will allow answering two open questions: if there is a collective behavior of charm quarks inp+Acollisions at RHIC energy and if charm production is suppressed in the energy range ofsNN= 60–80 GeV. We argue that simultaneous measurement ofD0suppression as a function of traverse momentum at midrapidity and forward rapidity can help to pin down the mechanism of charm energy loss in the hot and dense nuclear medium.


2019 ◽  
Vol 204 ◽  
pp. 03002
Author(s):  
Nataliya Topilskaya ◽  
Alexey Kurepin

The physics opportunities offered by using the multi-TeV LHC beams for a fixed target experiment have been widely discussed in recent years. This mode is convenient to investigate rare processes of particle production and polarization phenomena because the expected luminosity exceeds the luminosity of the collider. The main physical goals of these experiments are: i) investigations of the large-x gluon, antiquark and heavy quark content in the nucleon and nucleus; ii) investigations of the dynamics and spin of quarks and gluons inside nucleus; iii) studies of the ion-ion collisions between SPS and RHIC energies towards large rapidities. With the LHC lead beam energy scan on a fixed target it would be possible to investigate the energy range up to 72 GeV to search for the critical point for the phase transition to the Quark Gluon Plasma (QGP).


2014 ◽  
Vol 45 (1) ◽  
pp. 336-337 ◽  
Author(s):  
A. Rakotozafindrabe ◽  
M. Anselmino ◽  
R. Arnaldi ◽  
S. J. Brodsky ◽  
V. Chambert ◽  
...  

2013 ◽  
Vol 2013 ◽  
pp. 1-27 ◽  
Author(s):  
S. K. Tiwari ◽  
C. P. Singh

The current status of various thermal and statistical descriptions of particle production in the ultrarelativistic heavy-ion collisions experiments is presented in detail. We discuss the formulation of various types of thermal models of a hot and dense hadron gas (HG) and the methods incorporated in the implementing of the interactions between hadrons. It includes our new excluded-volume model which is thermodynamically consistent. The results of the above models together with the experimental results for various ratios of the produced hadrons are compared. We derive some new universal conditions emerging at the chemical freeze-out of HG fireball showing independence with respect to the energy as well as the structure of the nuclei used in the collision. Further, we calculate various transport properties of HG such as the ratio of shear viscosity-to-entropy using our thermal model and compare with the results of other models. We also show the rapidity as well as transverse mass spectra of various hadrons in the thermal HG model in order to outline the presence of flow in the fluid formed in the collision. The purpose of this review article is to organize and summarize the experimental data obtained in various experiments with heavy-ion collisions and then to examine and analyze them using thermal models so that a firm conclusion regarding the formation of quark-gluon plasma (QGP) can be obtained.


1991 ◽  
Vol 43 (4) ◽  
pp. 1881-1892 ◽  
Author(s):  
G. E. Brown ◽  
C. M. Ko ◽  
Z. G. Wu ◽  
L. H. Xia

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