Global Properties of Nucleus–Nucleus Collisions

Kliemant, M.; Sahoo, R.; Schuster, T.; Stock, R.

doi:10.1007/978-3-642-02286-9_2

Cited by 11 publications

(10 citation statements)

References 140 publications

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“…Some of the signatures of QGP are the observation of high energy density, high-temperature matter, enhancement of strangeness, azimuthal anisotropy, elliptic flow, collective radial expansion, suppression of quarkonia, etc. [5,6].…”

Section: Qgp Signaturesmentioning

confidence: 99%

“…To have a better realization of these numbers, the energy density of a normal nuclear matter is, ρ N = 0.17 GeV/fm 3 and the energy density of a nucleon is, ρ p = 0.5 GeV/fm 3 (taking proton charge radius 0.877 fm). In comparison to a hadron gas, the degrees of freedom for a QGP is an order of magnitude higher, which signals the deconfinement transition [5]. Some of the important signatures of QGP are briefly discussed here and for completeness, one can have a look at any standard books on QGP or high energy heavy-ion collisions [7,8].…”

Section: Qgp Signaturesmentioning

confidence: 99%

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Possible early universe signals in proton collisions at the Large Hadron Collider

Sahoo,

Nayak

2022

Preprint

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Our universe was born about 13.8 billion years ago from an extremely hot and dense singular point, in a process known as the Big Bang. The hot and dense matter which dominated the system within a few microseconds of its birth was in the form of a soup of elementary quarks and gluons, known as the quark-gluon plasma (QGP). Signatures compatible with the formation of the QGP matter have experimentally been observed in heavy-ion (such as Au or Pb) collisions at ultra-relativistic energies. Recently, experimental data of proton-proton (pp) collisions at the CERN Large Hadron Collider (LHC) have also shown signals resembling those of the QGP formation, which made these studies quite stimulating as to how the collision of small systems features in producing the early universe signals. In this article, we report on some of the compelling experimental results and give an account of the present understanding. We review the pp physics program at the LHC and discuss future prospects in the context of exploring the nature of the primordial matter in the early universe.

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Section: Qgp Signaturesmentioning

confidence: 99%

Section: Qgp Signaturesmentioning

confidence: 99%

Possible early universe signals in proton collisions at the Large Hadron Collider

Sahoo,

Nayak

2022

Preprint

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“…Simplicity of the model probably is one of the reasons why it is considered to be a "wildly extremal proposal" [1]. Of course, the scope of the original model was rather narrow.…”

Section: Advances In High Energy Physicsmentioning

confidence: 99%

“…Measurements at RHIC and CERN have discovered that the central collisions of heavy ions at these energies result initially in production of hadronic matter in the form of very hot compressed and a nearly frictionless liquid, quark-gluon plasma (QGP), whose evolution and decay produce the final state particles (for reviews see, e.g., [1,2]). The data were analyzed in the framework of various theoretical approaches, including different, sometimes very sophisticated, versions of the hydrodynamic model [3][4][5].…”

mentioning

confidence: 99%

Observation of Gaussian Pseudorapidity Distributions for Produced Particles in Proton-Nucleus Collisions at Tevatron Energies

Ulugbek

Kadyr

Vladimir

et al. 2018

Advances in High Energy Physics

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The statistical event-by-event analysis of inelastic interactions of protons in emulsion at 800 GeV reveals the existence of group of events with Gaussian pseudorapidity distributions for produced particles, as suggested by hydrodynamic-tube model. Events belong to very central collisions of protons with heavy emulsion nuclei with probability of realization of less than 1% and with multiplicity of shower particles exceeding (2-3 times) the average multiplicity in proton-nucleus collisions in emulsion. Bjorken’s energy density for these events reaches 2.0 GeV per fm3. The data are interpreted as a result of the QCD phase transition in proton-tube collisions at Tevatron energies.

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“…To explore, the final state effects, a study on particle spectra, kinetic freeze out parameters and particle ratios can be studied. In this work, the global properties [20] such as Bjorken energy density, speed of sound, particle ratios and kinetic freezeout parameters are studied for O+O collisions at √ s NN = 7 TeV using AMPT for both harmonic oscillator and Woods-Saxon nuclear density profile incorporated in oxygen nucleus, in order to explore the effect of nuclear density profile of the final state observables. In addition, these findings, when confronted to the available experimental data in due course would reveal the nuclear density profile of Oxygen nucleus from the observations of ultra-relativistic nuclear collisions.…”

Section: Introductionmentioning

confidence: 99%

Effect of nuclear density profile on the global properties in O+O collisions at the Large Hadron Collider using a multi-phase transport model

Behera,

Mallick,

Tripathy

et al. 2021

Preprint

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Oxygen ( 16 O) ions are planned to be injected at the Large Hadron Collider (LHC) in its next runs and a day of physics run is anticipated for O+O collisions at √ sNN = 7 TeV. As the system size of O+O collisions is in between those produced in pp and p+Pb collisions, the study of global properties in O+O collisions may provide a deeper insight into the heavy-ion-like behavior observed in small collision systems and its similarities/differences with larger system like Pb+Pb collisions.In the present work, we report the predictions for global properties in O+O collisions at √ sNN = 7 TeV using a multi-phase transport model (AMPT). We report the mid-rapidity charged particle multiplicity, transverse mass, Bjorken energy density, pseudorapidity distributions, speed of sound, transverse momentum (pT) spectra, the kinetic freeze-out parameters and pT-differential particle ratio as a function of collision centrality. Further, we have studied the transverse momentum dependent elliptic flow of charged particles. The results are shown for Woods-Saxon and harmonic oscillator nuclear density profiles incorporated inside oxygen nucleus. With the change of the density profile with harmonic oscillator from Woods-Saxon, a modification of average charged-particle multiplicity at most central collisions is seen. Bjorken energy density show a significant increase in most central collisions for harmonic oscillator density profile while other global properties show less dependence on the density profiles considered in this work.

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Global Properties of Nucleus–Nucleus Collisions

Cited by 11 publications

References 140 publications

Possible early universe signals in proton collisions at the Large Hadron Collider

Possible early universe signals in proton collisions at the Large Hadron Collider

Observation of Gaussian Pseudorapidity Distributions for Produced Particles in Proton-Nucleus Collisions at Tevatron Energies

Effect of nuclear density profile on the global properties in O+O collisions at the Large Hadron Collider using a multi-phase transport model

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