Charm hadron azimuthal angular correlations in Au + Au collisions at $$\sqrt{s_{\mathrm{NN}}} = 200$$ GeV from parton scatterings

Wang, Hai; Chen, Jinhui; Ma, Yugang; Zhang, Song

doi:10.1007/s41365-019-0706-z

Cited by 39 publications

(18 citation statements)

References 34 publications

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“…Based on the experiments cited from literature [37][38][39][40][41][42][43][44], we have used two main selection factors for the data. (1) The squared photon virtuality Q 2 = −P 2 γ , where P γ denotes the four-momentum of the photon. (2) The center-of-mass…”

Section: Figure Reactionmentioning

confidence: 99%

“…In high-energy collisions, it is interesting for us to describe the excitation and equilibrium degrees of an interacting system because of the two degrees related to the reaction mechanism and evolution process of the collision system [1][2][3][4][5][6][7][8][9][10]. In the progress of describing the excitation degree and structure character of the system, temperature is an important quantity in physics in view of intuitiveness and representation.…”

Section: Introductionmentioning

confidence: 99%

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Initial- and Final-State Temperatures of Emission Source from Differential Cross-Section in Squared Momentum Transfer in High-Energy Collisions

Wang

Liu

Olimov

2021

Advances in High Energy Physics

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The differential cross-section in squared momentum transfer of ρ , ρ 0 , ω , ϕ , f 0 980 , f 1 1285 , f 0 1370 , f 1 1420 , f 0 1500 , and J / ψ produced in high-energy virtual photon-proton ( γ ∗ p ), photon-proton ( γ p ), and proton-proton ( p p ) collisions measured by the H1, ZEUS, and WA102 Collaborations is analyzed by the Monte Carlo calculations. In the calculations, the Erlang distribution, Tsallis distribution, and Hagedorn function are separately used to describe the transverse momentum spectra of the emitted particles. Our results show that the initial- and final-state temperatures increase from lower squared photon virtuality to a higher one and decrease with the increase of center-of-mass energy.

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Section: Figure Reactionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Initial- and Final-State Temperatures of Emission Source from Differential Cross-Section in Squared Momentum Transfer in High-Energy Collisions

Wang

Liu

Olimov

2021

Advances in High Energy Physics

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“…In high-energy heavy-ion collisions such as those at the Relativistic Heavy Ion Collider and the Large Hadron Collider, quark-gluon plasma (QGP) with deconfined parton degrees of freedom is formed [1,2]. Interactions among the partons, which reflect the properties of the quark-gluon plasma, could significantly affect many final state observables such as the hadron spectra, collective flows, and fluctuations [3][4][5][6][7]. A parton cascade model provides a microscopic description of the space-time evolution of the partonic phase of relativistic heavy-ion collisions.…”

Section: Introductionmentioning

confidence: 99%

Validation and improvement of the ZPC parton cascade inside a box

Zhao

et al. 2020

Phys. Rev. C

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Cascade solutions of the Boltzmann equation suffer from causality violation at high densities and/or scattering cross sections. Although the particle subdivision technique can reduce the causality violation, it alters event-byevent correlations and fluctuations and is also computationally expensive. Here we evaluate and then improve the accuracy of the ZPC parton cascade for elastic scatterings inside a box without using parton subdivision. We first test different collision schemes for the collision times and ordering time and find that the default collision scheme does not accurately describe the equilibrium momentum distribution at large opacities. We then find a specific collision scheme that can describe very accurately the equilibrium momentum distribution as well as the time evolution towards equilibrium, even at large opacities. We also calculate the shear viscosity and the η/s ratio of the parton systems and confirm that the new collision scheme is more accurate. In addition, we use a novel parton subdivision method to obtain the "exact" evolution of the system. This subdivision method is valid for such box calculations and is so much more efficient than the standard subdivision method that we use a subdivision factor of 10 6 in this study.

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“…There are two versions of AMPT: one for a string melting mechanism, in which a partonic phase is generated from excited strings in the HIJING model, and a simple quark coalescence model is used to combine the partons into hadrons; the other for the default AMPT version which only undergoes a pure hadron gas phase. AMPT model has been widely used in heavy ion collision at RHIC and LHC [43,46,[51][52][53][54] and the detailed introduction can be found therein. In the present work, we use the string-melting version AMPT.…”

Section: Ampt Model and Analysis Methodsmentioning

confidence: 99%

System dependence of away-side broadening and $α$-clustering light nuclei structure effect in dihadron azimuthal correlations

Wang,

Zhang,

2021

Preprint

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We investigate the effect of α cluster in relativistic collisions via di-hadron azimuthal correlation. A collision system scan involving α-clustered 12 C and 16 O is studied by using a multiphase transport model in the most central collisions at √ sNN = 6.37 TeV. We compare the correlation functions of different configurations and calculate root-mean-square width and kurtosis in the away-side region. The momentum dependence of di-hadron azimuthal correlation is also presented. The results show substantial distinction in correlation functions between Woods-Saxon distribution and α-clustered structures. We argue that the difference related to jet quenching is originated from initial geometry anisotropy. This work proposed that di-hadron azimuthal correlation is a potential probe to distinguish α-clustered nuclei.

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Charm hadron azimuthal angular correlations in Au + Au collisions at $$\sqrt{s_{\mathrm{NN}}} = 200$$ GeV from parton scatterings

Cited by 39 publications

References 34 publications

Initial- and Final-State Temperatures of Emission Source from Differential Cross-Section in Squared Momentum Transfer in High-Energy Collisions

Initial- and Final-State Temperatures of Emission Source from Differential Cross-Section in Squared Momentum Transfer in High-Energy Collisions

Validation and improvement of the ZPC parton cascade inside a box

System dependence of away-side broadening and $α$-clustering light nuclei structure effect in dihadron azimuthal correlations

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