scholarly journals Application of FHCal for Heavy-Ion Collision Centrality Determination in MPD/NICA Experiment

Particles ◽  
2021 ◽  
Vol 4 (2) ◽  
pp. 236-240
Author(s):  
Vadim Volkov ◽  
Marina Golubeva ◽  
Fedor Guber ◽  
Alexander Ivashkin ◽  
Nikolay Karpushkin ◽  
...  
Keyword(s):  
Time Projection Chamber ◽  
Energy Deposition ◽  
Heavy Ion ◽  
Heavy Ion Collision ◽  
Energy Distributions ◽  
Hadron Calorimeter ◽  
Collision Centrality ◽  
Time Projection ◽  
Ion Collision

Two approaches related to the centrality determination in heavy-ion Multi-Purpose Detector (MPD) experiments, using charge-particles multiplicity in Time Projection Chamber (TPC) and the energy deposition in Forward Hadron Calorimeter (FHCal) are discussed. The main features of the FHCal are the fine transverse segmentation and the beam holes in the center of the calorimeters. Leaking the heavy non-interacting fragments (spectators) leads to ambiguity in the dependence of energy deposition in the FHCal on the collision centrality. However, the calorimeter transverse segmentation allows one to measure the energy distributions in each of the FHCal modules and to construct combined observables to resolve the problems associated with the beam hole. The comparison of these approaches in the collision centrality measurements is discussed.

scholarly journals Determination of geometry of heavy ion collisions with forward hadron calorimeter (FHCal) at MPD/NICA

2019 ◽  
Vol 204 ◽  
pp. 07002 ◽  
Author(s):  
Alexander Ivashkin ◽  
Dmitry Finogeev ◽  
Marina Golubeva ◽  
Fedor Guber ◽  
Alexander Izvestnyy ◽  
...  
Keyword(s):  
Energy Deposition ◽  
Heavy Ion ◽  
Reaction Plane ◽  
Heavy Ion Collision ◽  
Collision Point ◽  
Ion Collisions ◽  
Peripheral Collisions ◽  
Ion Collision ◽  
Energy Asymmetry

The main purpose of the FHCal is to provide an experimental measurement of a heavy-ion collision centrality (impact parameter) and orientation of its reaction plane. FHCal consists of two identical arms placed at the left/right sides from the beam collision point. Due to the fine modular structure and detection of spectators in both forward/backward regions, the angular resolution of the reaction plane reconstruction is below 30 degrees. Since the heavy fragments escape into beam holes, it is not possible to distinguish the central and peripheral collisions using only the deposited energies in FHCal. The subdivision of the calorimeter into two, inner and outer parts, and the calculation of the energy depositions separately in these calorimeter parts allow one to construct a new observable, the energy asymmetry. Taking the two-dimensional correlation between the energy asymmetry and full energy deposition in the calorimeter, it would be possible to resolve the ambiguity in the centrality determination.

Collision geometry and particle production in high energy heavy ion collision experiments

2008 ◽  
Vol 32 (4) ◽  
pp. 308-328
Author(s):  
Wang Ya-Ping ◽  
Zhou Dai-Mei ◽  
Huang Rui-Dian ◽  
Cai Xu
Keyword(s):  
Particle Production ◽  
Heavy Ion ◽  
High Energy ◽  
Heavy Ion Collision ◽  
Ion Collision

Dynamical model for neck formation in the entrance channel of a heavy ion collision

1982 ◽  
Vol 306 (4) ◽  
pp. 307-313 ◽  
Author(s):  
S. K. Samaddar ◽  
B. C. Samanta ◽  
D. Sperber ◽  
M. Zielińska-Pfabé
Keyword(s):  
Heavy Ion ◽  
Entrance Channel ◽  
Dynamical Model ◽  
Heavy Ion Collision ◽  
Neck Formation ◽  
Ion Collision

Study and Investigation of Hard Photons Emission in Heavy Ion Collisions

2021 ◽  
Vol 19 (2) ◽  
pp. 61-65
Author(s):  
Taghreed A. Younis ◽  
Hadi J.M. Al-Agealy
Keyword(s):  
Critical Temperature ◽  
Quark Gluon Plasma ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Heavy Ion Collision ◽  
Hard Photon ◽  
Ion Collisions ◽  
Strength Models ◽  
Ion Collision

This work involves hard photon rate production from quark -gluon plasma QGP interaction in heavy ion collision. Using a quantum chromodynamic model to investigate and calculation of photons rate in 𝑐𝑔 → 𝑠𝑔𝛾 system due to strength coupling, photons rate, temperature of system, flavor number and critical. The photons rate production computed using the perturbative strength models for QGP interactions. The strength coupling was function of temperature of system, flavor number and critical temperature. Its influenced by force with temperature of system, its increased with decreased the temperature and vice versa. The strength coupling has used to examine the confinement and deconfinement of quarks in QGP properties and influence on the photon rate production. In our approach, we calculate the photons rate depending on the strength coupling, photons rate and temperature of system with other factors. The results plotted as a function of the photons energy. The photons rate was decreased with increased temperature and increased with decreased with strength coupling.

scholarly journals Bremsstrahlung pair production in relativistic heavy ion collision

1998 ◽  
Vol 2 (4) ◽  
pp. 741 ◽  
Author(s):  
Helmar Meier ◽  
Kai Hencken ◽  
Dirk Trautmann ◽  
Gerhard Baur
Keyword(s):  
Pair Production ◽  
Heavy Ion ◽  
Heavy Ion Collision ◽  
Relativistic Heavy Ion Collision ◽  
Ion Collision

scholarly journals Hadron resonance gas with van der Waals interactions

2020 ◽  
Vol 29 (05) ◽  
pp. 2040002 ◽  
Author(s):  
Volodymyr Vovchenko
Keyword(s):  
Equation Of State ◽  
Van Der Waals ◽  
Heavy Ion ◽  
Van Der Waals Interactions ◽  
Excluded Volume ◽  
Heavy Ion Collision ◽  
Lattice Quantum Chromodynamics ◽  
Qcd Critical Point ◽  
Lattice Quantum ◽  
Ion Collision

An overview of a hadron resonance gas (HRG) model that includes van der Waals (vdW) interactions between hadrons is presented. Applications of the excluded volume HRG model to heavy-ion collision data and lattice quantum chromodynamics (QCD) equation of state are discussed. A recently developed quantum vdW HRG model is covered as well. Applications of this model in the context of the QCD critical point are elaborated.

scholarly journals Development of the Detector for Relativistic Heavy-Ion-Collision Experiments

2010 ◽  
Vol 19 (1/2) ◽  
pp. 32
Author(s):  
Youngil KWON ◽  
Young-Jin KIM ◽  
In-Kwon YOO ◽  
Byungsik HONG
Keyword(s):  
Heavy Ion ◽  
Heavy Ion Collision ◽  
Relativistic Heavy Ion Collision ◽  
Ion Collision
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