Abstract:Experimental observation of jet quenching in ultra-relativistic heavy-ion collisions is one of the most remarkable discoveries at RHIC. High-p T hadron suppression, disappearance of back-to-back jets, and strong away-side modification at intermediate to low p T have provided us many insights into the matter created at RHIC. Particularly, angular correlations have become a powerful tool to study the QCD matter through its interactions with jets. Di-hadron correlations reveal significant broadening and softening… Show more
“…So, indirect signatures are used such as strangeness enhancement, di-lepton production, jet quenching, open charm enhancement and electromagnetic radiations. [7][8][9]. In order to have a deep understanding of the system created as a result of heavy-ion collisions, a comprehensive study of particle production and evolution of the system is required.…”
Section: Introductionmentioning
confidence: 99%
“…Therefore, the whole collision scenario is divided into different stages. These different stages involve hydrodynamic expansion of the system (bulk matter production), creation of QGP, and phase transition from QGP to hadronic phase [8][9][10]. In addition, kinetic and chemical freeze-outs are two important stages during the evolution of the heavy-ion collision systems.…”
Section: Introductionmentioning
confidence: 99%
“…In addition, kinetic and chemical freeze-outs are two important stages during the evolution of the heavy-ion collision systems. The system has a transition from QGP phase to hadronic matter at chemical freeze-out, and the transverse momentum ( p T ) spectra of produced particle are specified at the kinetic freeze-out [5,8,9]. QGP is not expected to be created in the small system (pp) with low multiplicity, due to very small density and volume of collision region.…”
Section: Introductionmentioning
confidence: 99%
“…On the basis of Bjorken estimation [12], it is believed that the energy density in the early stages of central Au-Au collisions at RHIC at 130 GeV and 200 GeV is sufficiently high to create a phase of deconfined matter (QGP) in the laboratory [6,13]. In heavy-ion collisions at RHIC, the first evidence of jet quenching was observed in 2003 in the STAR and PHENIX experiments [2,6,8,9]. The jet loses more energy as it was pushed further into the dense fireball of a heavy-ion collision − 30 to 50 times as dense as an ordinary nucleus.…”
In this paper, we have reported the transverse momentum ( p T ) spectra of averaged charged pions (π ± ), kaons (K ± ), protons and antiprotons in pp and most central 0-6% Au-Au collisions at √ s N N 200 GeV. The simulation is done by models including EPOS-LHC, EPOS-1.99, and QGSJETII-04. The transverse momentum ( p T ) distributions are plotted for π + + π − /2, (K + + K − )/2 and ( p + p)/2 in the p T range of 0 < p T < 3 GeV/c, 0 < p T < 2 GeV/c and 0.5 < p T < 4.5 GeV/c, respectively. We have also plotted the pseudo-rapidity distributions of charged hadrons produced in pp and Au-Au collisions at √ s N N 200 GeV.This analysis also includes the nuclear modification factor (R A A ) which is plotted as a function of p T to study the effects of deconfined medium created in most central Au-Au collisions. Simulation data are compared with the experimental data. The simulated distributions are compared to the RHIC experimental data at √ s N N 200 GeV for both collision systems in order to validate the above-mentioned simulation codes. Although it is observed that a good comparison exists between the models predictions and experimental data but none of them completely describe the experimental data over the entire p T and η range.
“…So, indirect signatures are used such as strangeness enhancement, di-lepton production, jet quenching, open charm enhancement and electromagnetic radiations. [7][8][9]. In order to have a deep understanding of the system created as a result of heavy-ion collisions, a comprehensive study of particle production and evolution of the system is required.…”
Section: Introductionmentioning
confidence: 99%
“…Therefore, the whole collision scenario is divided into different stages. These different stages involve hydrodynamic expansion of the system (bulk matter production), creation of QGP, and phase transition from QGP to hadronic phase [8][9][10]. In addition, kinetic and chemical freeze-outs are two important stages during the evolution of the heavy-ion collision systems.…”
Section: Introductionmentioning
confidence: 99%
“…In addition, kinetic and chemical freeze-outs are two important stages during the evolution of the heavy-ion collision systems. The system has a transition from QGP phase to hadronic matter at chemical freeze-out, and the transverse momentum ( p T ) spectra of produced particle are specified at the kinetic freeze-out [5,8,9]. QGP is not expected to be created in the small system (pp) with low multiplicity, due to very small density and volume of collision region.…”
Section: Introductionmentioning
confidence: 99%
“…On the basis of Bjorken estimation [12], it is believed that the energy density in the early stages of central Au-Au collisions at RHIC at 130 GeV and 200 GeV is sufficiently high to create a phase of deconfined matter (QGP) in the laboratory [6,13]. In heavy-ion collisions at RHIC, the first evidence of jet quenching was observed in 2003 in the STAR and PHENIX experiments [2,6,8,9]. The jet loses more energy as it was pushed further into the dense fireball of a heavy-ion collision − 30 to 50 times as dense as an ordinary nucleus.…”
In this paper, we have reported the transverse momentum ( p T ) spectra of averaged charged pions (π ± ), kaons (K ± ), protons and antiprotons in pp and most central 0-6% Au-Au collisions at √ s N N 200 GeV. The simulation is done by models including EPOS-LHC, EPOS-1.99, and QGSJETII-04. The transverse momentum ( p T ) distributions are plotted for π + + π − /2, (K + + K − )/2 and ( p + p)/2 in the p T range of 0 < p T < 3 GeV/c, 0 < p T < 2 GeV/c and 0.5 < p T < 4.5 GeV/c, respectively. We have also plotted the pseudo-rapidity distributions of charged hadrons produced in pp and Au-Au collisions at √ s N N 200 GeV.This analysis also includes the nuclear modification factor (R A A ) which is plotted as a function of p T to study the effects of deconfined medium created in most central Au-Au collisions. Simulation data are compared with the experimental data. The simulated distributions are compared to the RHIC experimental data at √ s N N 200 GeV for both collision systems in order to validate the above-mentioned simulation codes. Although it is observed that a good comparison exists between the models predictions and experimental data but none of them completely describe the experimental data over the entire p T and η range.
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