scholarly journals Two-particle correlations on transverse momentum: an untapped resource for studying relativistic heavy-ion collision dynamics

2020 ◽  
Vol 235 ◽  
pp. 01003
Author(s):  
Robert L. Ray ◽  
Alexander M. Jentsch
Keyword(s):  
Transverse Momentum ◽  
Heavy Ion ◽  
Heavy Ion Collision ◽  
Collision Dynamics ◽  
Particle Correlation ◽  
Angular Correlations ◽  
Relativistic Heavy Ion Collision ◽  
Theoretical Predictions ◽  
Ion Collision ◽  
Untapped Resource

Two-particle correlation projections onto two-dimensional transverse momentum coordinates (pt1, pt2) allow access to properties of the relativistic heavy-ion collision system which are complementary to that studied using angular correlations. Examples include the degree of thermal equilibration and the variance of dynamical fluctuations in hard-scattering processes. Results for minimum-bias Au + Au collisions at √sNN = 200 are presented, with the structures described by two phenomenological models. The correlations structures and extracted physical quantities are then compared to theoretical predictions. Conclusions from these comparisons regarding global equilibration, fluctuations in soft and semi-hard QCD processes, and the effects of the hot, dense collision medium are presented.

scholarly journals SYSTEM SIZE AND ENERGY DEPENDENCE OF HIGH pT HADRON PRODUCTION MEASURED WITH PHENIX EXPERIMENT AT RHIC

2007 ◽  
Vol 16 (07n08) ◽  
pp. 2166-2173 ◽  
Author(s):  
◽  
TAKAO SAKAGUCHI
Keyword(s):  
Transverse Momentum ◽  
Particle Production ◽  
System Size ◽  
Heavy Ion ◽  
Hadron Production ◽  
Heavy Ion Collision ◽  
High Transverse Momentum ◽  
Relativistic Heavy Ion Collision ◽  
Phenix Experiment ◽  
Ion Collision

PHENIX has measured high transverse momentum (pT) identified hadrons in different collision species and energies in the last five RHIC runs. The systematic study of the high PT hadron production provides an idea on interaction of hard scattered partons and the matter created in relativistic heavy ion collision. The η/π0 ratio is measured in Au + Au collisions, which gives a hint on the system thermalization and particle production. A future measurement of hadron and photon measurement is discussed.

Complex potential and bottomonium suppression at LHC energy

2015 ◽  
Vol 30 (09) ◽  
pp. 1550043 ◽  
Author(s):  
Uttam Kakade ◽  
Binoy Krishna Patra ◽  
Lata Thakur
Keyword(s):  
Transverse Momentum ◽  
Density Ratio ◽  
Heavy Ion ◽  
Entropy Density ◽  
Heavy Ion Collision ◽  
Relativistic Heavy Ion Collision ◽  
Quark Potential ◽  
Heavy Quark Potential ◽  
Ion Collision ◽  
Perturbative Result

We have studied the thermal suppression of the bottomonium states in relativistic heavy-ion collision at LHC energies as function of centrality, rapidity, transverse momentum. First, we address the effects of the nonperturbative confining force and the momentum anisotropy together on heavy quark potential at finite temperature, which are resolved by correcting both the perturbative and nonperturbative terms of the potential at T = 0 in a weakly-anisotropic medium, not its perturbative term alone as usually done in the literature. Second, we model the expansion of medium by the Bjorken hydrodynamics in the presence of both shear and bulk viscosity, followed by an additional pre-equilibrium anisotropic evolution. Finally, we couple them together to quantify the yields of bottomonium production in nucleus–nucleus collisions at LHC energies and found a better agreement with the CMS data. Our estimate of the inclusive ϒ(1S) production indirectly constrains both the uncertainties in isotropization time and the shear-to-entropy density ratio and favors the values as 0.3 fm/c and 0.3 (perturbative result), respectively.

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 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

TWO- AND MULTI-PARTICLE CORRELATIONS: ACCESS TO DYNAMICS AND STRUCTURE OF NUCLEAR SYSTEMS

2008 ◽  
Vol 17 (09) ◽  
pp. 1790-1798
Author(s):  
GIUSEPPE VERDE
Keyword(s):  
Heavy Ion ◽  
Heavy Ion Collision ◽  
Particle Correlation ◽  
Particle Correlations ◽  
Nuclear Systems ◽  
Ion Collision

Results from particle correlation measured in heavy-ion collision experiments are shown. Information about dynamics of the reaction as well as and spectroscopy of unbound nuclear systems can be extracted, offering important opportunities for future experiments with exotic nuclear beams.

RAPIDITY CORRELATIONS IN PARTICLES PRODUCED IN INELASTIC COLLISIONS OF 12C AND 28Si IONS IN EMULSION AT 4.5A GeV/c

1992 ◽  
Vol 01 (04) ◽  
pp. 859-870 ◽  
Author(s):  
M. TARIQ ◽  
M. ZAFAR ◽  
S. AHMAD
Keyword(s):  
Correlation Functions ◽  
Heavy Ion ◽  
Inelastic Collisions ◽  
Heavy Ion Collision ◽  
Particle Correlation ◽  
Ion Interactions ◽  
Zero Correlation ◽  
Rapidity Gap ◽  
Ion Collision

Correlations between particles produced in the interactions of 28 Si and 12 C nuclei with emulsion nuclei at 4.5A GeV/c has been investigated. 701 events of 28 Si and 844 of 12 C interactions have been analysed. A method which combines techniques from the method of using the two-particle correlation functions and from rapidity-gap distributions is applied. This method has been used successfully by others to study the correlation in P-Em and light-ion interactions. However, we have applied it to the heavy-ion collision data. Small but significant departure from zero-correlation is observed.

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