Bibliographies thématiques / Hard scattering in relativistic heavy ion collisions

Littérature scientifique sur le sujet « Hard scattering in relativistic heavy ion collisions »

Auteur : Grafiati

Publié le 11 mars 2023

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Articles de revues sur le sujet "Hard scattering in relativistic heavy ion collisions"

Kumar for the ALICE Collaboration, Shyam. « Characterising Charm Jet Properties with Azimuthal Correlations of D Mesons and Charged Particles with ALICE at the LHC ». Proceedings 10, n^o 1 (19 avril 2019) : 35. http://dx.doi.org/10.3390/proceedings2019010035.

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Charm quarks are produced via hard parton scattering in ultra-relativistic heavy-ion collisions, hence are ideal probes to study a possible de-confined state of matter, known as Quark Gluon Plasma (QGP). The angular correlation of a meson containing a charm quark with other charged particles in heavy-ion collisions can help in studying the properties of QGP. Similar studies in pp collisions can give insight about the charm production mechanism while in p-Pb collisions could provide essential information to disentangle final-state QGP-induced modifications from effects caused by cold nuclear matter. In this proceedings, the results are presented for p-Pb collisions at s NN = 5.02 TeV and pp collisions at s = 13 TeV, so far the highest available energy at the LHC. The results are compared with Monte Carlo (MC) simulations using PYTHIA and POWHEG event generators and with pp collision results at s = 7 TeV.

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Ray, Robert L., et Alexander M. Jentsch. « Two-particle correlations on transverse momentum : an untapped resource for studying relativistic heavy-ion collision dynamics ». EPJ Web of Conferences 235 (2020) : 01003. http://dx.doi.org/10.1051/epjconf/202023501003.

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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.

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Nouicer, Rachid. « Highlights from PHENIX at RHIC ». EPJ Web of Conferences 171 (2018) : 01003. http://dx.doi.org/10.1051/epjconf/201817101003.

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Hadrons conveying strange quarks or heavy quarks are essential probes of the hot and dense medium created in relativistic heavy-ion collisions. With hidden strangeness, ϕ meson production and its transport in the nuclear medium have attracted high interest since its discovery. Heavy quark-antiquark pairs, like charmonium and bottomonium mesons, are mainly produced in initial hard scattering processes of partons. While some of the produced pairs form bound quarkonia, the vast majority hadronize into particles carrying open heavy flavor. In this context, the PHENIX collaboration carries out a comprehensive physics program which studies the ϕ meson production, and heavy flavor production in relativistic heavy-ion collisions at RHIC. In recent years, the PHENIX experiment upgraded the detector in installing silicon vertex tracker (VTX) at mid-rapidity region and forward silicon vertex tracker (FVTX) at the forward rapidity region. With these new upgrades, the experiment has collected large data samples, and enhanced the capability of heavy flavor measurements via precision tracking. This paper summarizes the latest PHENIX results concerning ϕ meson, open and closed charm and beauty heavy quark production in relativistic heavy-ion collisions. These results are presented as a function of rapidity, energy and system size, and their interpretation with respect to the current theoretical understanding.

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TANNENBAUM, M. J. « RESULTS FROM PHENIX AT RHIC WITH IMPLICATIONS FOR LHC ». International Journal of Modern Physics A 26, n^o 32 (30 décembre 2011) : 5299–335. http://dx.doi.org/10.1142/s0217751x11054966.

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Results from the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) in nucleus–nucleus and proton–proton collisions at c.m. energy [Formula: see text] are presented in the context of the methods of single and two-particle inclusive reactions which were used in the discovery of hard-scattering in p–p collisions at the CERN ISR in the 1970's. These techniques are used at RHIC in A + A collisions because of the huge combinatoric background from the large particle multiplicity. Topics include J/Ψ suppression, jet quenching in the dense medium (sQGP) as observed with π0 at large transverse momentum, thermal photons, collective flow, two-particle correlations, suppression of heavy quarks at large pT and its possible relation to Higgs searches at the LHC. The differences and similarities of the measurements in p–p and A + A collisions are presented. The two discussion sessions which followed the lectures on which this article is based are included at the end.

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Gupta, Rohit, Anjaly Menon, Shubhangi Jain et Satyajit Jena. « The Theoretical Description of the Transverse Momentum Spectra : A Unified Model ». Universe 9, n^o 2 (20 février 2023) : 111. http://dx.doi.org/10.3390/universe9020111.

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Analysis of transverse momentum distributions is a useful tool to understand the dynamics of relativistic particles produced in high-energy collisions. Finding a proper distribution function to approximate the spectra is a vastly developing area of research in particle physics. In this work, we have provided a detailed theoretical description of the unified statistical framework in high-energy physics. We have tested the applicability of this framework on experimental data by analyzing the transverse momentum spectra of pion produced in heavy-ion collision at RHIC and LHC. We have also attempted to explain the transverse momentum spectra of charged hadrons formed in pp collision at different energies using the unified statistical framework. This formalism has been proved to nicely explain the spectra of particles produced in soft processes as well as hard scattering processes in a consistent manner.

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Chang, Zilong. « Gluon polarization measurements from longitudinally polarized proton-proton collisions at STAR ». Journal of Physics : Conference Series 1643, n^o 1 (1 décembre 2020) : 012184. http://dx.doi.org/10.1088/1742-6596/1643/1/012184.

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Abstract The gluon polarization contribution to the proton spin is an integral part to solve the longstanding proton spin puzzle. At the Relativistic Heavy Ion Collider (RHIC), the STAR experiment has measured jets produced in mid-pseudo-rapidity, |η| < 1.0, and full azimuth, ϕ, from longitudinally polarized pp collisions to study the gluon polarization in the proton. At center of mass energies s = 200 and 510 GeV, jet production is dominated by hard QCD scattering processes such as gluon-gluon (gg) and quark-gluon (qg), thus making the longitudinal double-spin asymmetry (ALL ) sensitive to the gluon polarization. Early STAR inclusive jet ALL results at s = 200 GeV provided the first evidence of the non-zero gluon polarization at momentum fraction x > 0.05. The higher center of mass energy s = 510 GeV allows to explore the gluon polarization as low as x ∼ 0.015. In this talk we will present the recent STAR inclusive jet and dijet ALL results at s = 510 GeV, and discuss the relevant new analysis techniques for the estimation of trigger bias and reconstruction uncertainty, the underlying event correction on the jet energy and its effect on jet ALL . Dijet results are shown for different topologies in regions of pseudo-rapidity, effectively scanning the x-dependence of the gluon polarization.

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Maldonado-Gonzalez, Julio Cesar, Alejandro Ayala, Isabel Dominguez et Maria Elena Tejeda-Yeomans. « QGP hydrodynamical study using energy-momentum in-medium deposition by an extended source. » EPJ Web of Conferences 172 (2018) : 08003. http://dx.doi.org/10.1051/epjconf/201817208003.

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The quark-gluon plasma (QGP) is created under extreme conditions, such as the ones prevailing in heavy ion collisions. The characterization of the QGP can be done using high-pT probes such as the partons that are created through hard scatterings in the fireball. These fast-moving partons lose energy and momentum along their traveled path through the medium. The parton deposition of energy-momentum creates an in-medium disturbance that can be described using approximations within relativistic hydrodynamics in a defined regime of the QGP evolution. Based on earlier research in this field, we study the use of extended sources that depend on the location of the parton-jet in the initial stages of the QGP evolution. We explore this approach as a way to complement the current numerical landscape of hydrodynamical QGP studies and to eventually generate initial conditions that can be used as input of hydrodynamical numerical simulations.

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Wolschin, Georg. « Aspects of Relativistic Heavy-Ion Collisions ». Universe 6, n^o 5 (30 avril 2020) : 61. http://dx.doi.org/10.3390/universe6050061.

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The rapid thermalization of quarks and gluons in the initial stages of relativistic heavy-ion collisions is treated using analytic solutions of a nonlinear diffusion equation with schematic initial conditions, and for gluons with boundary conditions at the singularity. On a similarly short time scale of t ≤ 1 fm/c, the stopping of baryons is accounted for through a QCD-inspired approach based on the parton distribution functions of valence quarks, and gluons. Charged-hadron production is considered phenomenologically using a linear relativistic diffusion model with two fragmentation sources, and a central gluonic source that rises with ln 3 ( s N N ) . The limiting-fragmentation conjecture that agrees with data at energies reached at the Relativistic Heavy-Ion Collider (RHIC) is found to be consistent with Large Hadron Collider (LHC) data for Pb-Pb at s N N = 2.76 and 5.02 TeV. Quarkonia are used as hard probes for the properties of the quark-gluon plasma (QGP) through a comparison of theoretical predictions with recent CMS, ALICE and LHCb data for Pb-Pb and p-Pb collisions.

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ALBERICO, W. M., A. BERAUDO, A. DE PACE, A. MOLINARI, M. MONTENO, M. NARDI et F. PRINO. « LANGEVIN DYNAMICS OF HEAVY FLAVORS IN RELATIVISTIC HEAVY-ION COLLISIONS ». International Journal of Modern Physics E 20, n^o 07 (juillet 2011) : 1623–28. http://dx.doi.org/10.1142/s0218301311019982.

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We study the stochastic dynamics of c and b quarks, produced in hard initial processes, in the hot medium created after the collision of two relativistic heavy ions. This is done through the numerical solution of the relativistic Langevin equation. The latter requires the knowledge of the friction and diffusion coefficients, whose microscopic evaluation is performed treating separately the contribution of soft and hard collisions. The evolution of the background medium is described by ideal/viscous hydrodynamics. Below the critical temperature the heavy quarks are converted into hadrons, whose semileptonic decays provide single-electron spectra to be compared with the current experimental data measured at RHIC. We focus on the nuclear modification factor RAA and on the elliptic-flow coefficient v2, getting, for sufficiently large pT, a reasonable agreement.

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Steffen, Frank D., et Markus H. Thoma. « Hard thermal photon production in relativistic heavy ion collisions ». Physics Letters B 510, n^o 1-4 (juin 2001) : 98–106. http://dx.doi.org/10.1016/s0370-2693(01)00525-1.

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Thèses sur le sujet "Hard scattering in relativistic heavy ion collisions"

Salvini, Simona. « Double Parton Scattering in Proton-Nucleus Collisions ». Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/9963.

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2012/2013
Topic of my thesis is the joint study of Double Parton Scattering (DPS) in high energy proton-proton and proton-nucleus collisions in order to understand how the partons inside a proton are correlated among each other. The multi-parton structure is in fact probed in a different way by DPS, in p -p and in p -A collisions. In p-A collisions the interpretation of the experimental results may be however complicated by the presence of interference terms, which are missing in p-p. A suitable reaction channel, where interference terms are absent, is W JJ production. By studying W JJ production in p-Pb collisions, we estimate that the fraction of events due to DPS may be larger by a factor 3 or 4, as compared to p-p, while the amount of the increased fraction can give information on the importance of different correlation terms.
XXVI Ciclo
1981

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Uphoff, Jan [Verfasser], Carsten [Akademischer Betreuer] Greiner et Marcus [Akademischer Betreuer] Bleicher. « Open heavy flavor and other hard probes in ultra-relativistic heavy-ion collisions / Jan Uphoff. Gutachter : Carsten Greiner ; Marcus Bleicher. Betreuer : Carsten Greiner ». Frankfurt am Main : Univ.-Bibliothek Frankfurt am Main, 2014. http://d-nb.info/1048616037/34.

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Zaballa, Robert Adrian. « Do R_{AA} and R_{CP} Quantify Nuclear Medium Effects ? » Digital Archive @ GSU, 2008. http://digitalarchive.gsu.edu/phy_astr_diss/28.

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With the use of an incoherent binary nucleon-nucleon collision model of heavy ion collisions for simulating particle production, it is demonstrated that the nuclear modification factors, R_{AA} and R_{CP}, are less than unity for hard scattering in the absence of any nuclear modification effects. The nuclear modification factor R_{dAu} is also shown to approach or exceed unity only if p_T broadening is taken into account. With a simple phenomenological parameter, the mean nucleon energy loss fraction, this model yields particle distributions that are comparable to those of experiment. The nuclear geometry is described by the Glauber model, and particle production is simulated by the PYTHIA event generator.

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Salehi, Kasmaei Babak. « NONEQUILIBRIUM PROBES OF THE QUARK-GLUON PLASMA ». Kent State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=kent1627035862984205.

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Livres sur le sujet "Hard scattering in relativistic heavy ion collisions"

Shi, Shuzhe. Soft and Hard Probes of QCD Topological Structures in Relativistic Heavy-Ion Collisions. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-25482-7.

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Shi, Shuzhe. Soft and Hard Probes of QCD Topological Structures in Relativistic Heavy-Ion Collisions. Springer, 2019.

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Shi, Shuzhe. Soft and Hard Probes of QCD Topological Structures in Relativistic Heavy-Ion Collisions. Springer International Publishing AG, 2020.

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Chapitres de livres sur le sujet "Hard scattering in relativistic heavy ion collisions"

Shi, Shuzhe. « The Chiral Magnetic Effect and Corresponding Observables in Heavy-Ion Collisions ». Dans Soft and Hard Probes of QCD Topological Structures in Relativistic Heavy-Ion Collisions, 27–31. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-25482-7_2.

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Shi, Shuzhe. « Introduction ». Dans Soft and Hard Probes of QCD Topological Structures in Relativistic Heavy-Ion Collisions, 1–23. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-25482-7_1.

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Shi, Shuzhe. « Jet-Quenching on Top of Fluctuating Hot Medium ». Dans Soft and Hard Probes of QCD Topological Structures in Relativistic Heavy-Ion Collisions, 133–38. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-25482-7_10.

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Shi, Shuzhe. « Conclusions ». Dans Soft and Hard Probes of QCD Topological Structures in Relativistic Heavy-Ion Collisions, 139–41. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-25482-7_11.

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Shi, Shuzhe. « The Anomalous-Viscous Fluid Dynamics Framework ». Dans Soft and Hard Probes of QCD Topological Structures in Relativistic Heavy-Ion Collisions, 33–39. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-25482-7_3.

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Shi, Shuzhe. « Quantitative Study of the CME Signal ». Dans Soft and Hard Probes of QCD Topological Structures in Relativistic Heavy-Ion Collisions, 41–60. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-25482-7_4.

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Shi, Shuzhe. « How Event-by-Event Fluctuations Influence CME Signal ». Dans Soft and Hard Probes of QCD Topological Structures in Relativistic Heavy-Ion Collisions, 61–74. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-25482-7_5.

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Shi, Shuzhe. « The Chiral Magnetic Effect in Pre-equilibrium Stage ». Dans Soft and Hard Probes of QCD Topological Structures in Relativistic Heavy-Ion Collisions, 75–87. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-25482-7_6.

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Shi, Shuzhe. « Rotation of the QCD Plasma and the Chiral Vortical Effect ». Dans Soft and Hard Probes of QCD Topological Structures in Relativistic Heavy-Ion Collisions, 89–98. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-25482-7_7.

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Shi, Shuzhe. « Jet Energy-Loss Simulations ». Dans Soft and Hard Probes of QCD Topological Structures in Relativistic Heavy-Ion Collisions, 101–12. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-25482-7_8.

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Actes de conférences sur le sujet "Hard scattering in relativistic heavy ion collisions"

Canedo, Fabio, Jacquelyne Noronha-Hostler, Jorge Noronha, Leonardo Barreto de Oliveira Campos et Marcelo G. Munhoz. « Jet Quenching in Relativistic Heavy-Ion Collisions ». Dans 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions. Trieste, Italy : Sissa Medialab, 2021. http://dx.doi.org/10.22323/1.387.0139.

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Bratkovskaya, Elena, Taesoo Song, Pierre Moreau et Carsten Greiner. « Open charm and dileptons from relativistic heavy-ion collisions ». Dans 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions. Trieste, Italy : Sissa Medialab, 2021. http://dx.doi.org/10.22323/1.387.0090.

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Zhang, Shan-Liang, Xin-Nian Wang et Ben-Wei Zhang. « Production of W+jets in Relativistic heavy-ion collisions ». Dans 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions. Trieste, Italy : Sissa Medialab, 2021. http://dx.doi.org/10.22323/1.387.0049.

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Ryu, Sangwook, Scott McDonald, Chun Shen, Sangyong Jeon et Charles Gale. « Medium response from mini-jets and in-medium hadronization in relativistic heavy ion collisions ». Dans 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions. Trieste, Italy : Sissa Medialab, 2021. http://dx.doi.org/10.22323/1.387.0160.

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