Thermal Dileptons from Hot and Dense Strongly Interacting Matter

Specht, H. J.

doi:10.1063/1.3541982

Cited by 46 publications

(38 citation statements)

References 16 publications

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“…The resulting spectrum, Fig. 22, exhibits an almost perfect exponential fall off, which is consistent with thermal radiation with a temperature of T = 205 ± 12 MeV [328,332]. Since dileptons are emitted during the entire evolution of the fireball, this temperature should be considered as a lower limit of the temperature reached in these collisions.…”

Section: Thermal Radiationmentioning

confidence: 55%

Properties of hot and dense matter from relativistic heavy ion collisions

et al. 2016

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a b s t r a c tWe review the progress achieved in extracting the properties of hot and dense matter from relativistic heavy ion collisions at the relativistic heavy ion collider (RHIC) at Brookhaven National Laboratory and the large hadron collider (LHC) at CERN. We focus on bulk properties of the medium, in particular the evidence for thermalization, aspects of the equation of state, transport properties, as well as fluctuations and correlations. We also discuss the in-medium properties of hadrons with light and heavy quarks, and measurements of dileptons and quarkonia. This review is dedicated to the memory of Gerald E. Brown.

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Section: Thermal Radiationmentioning

confidence: 55%

Properties of hot and dense matter from relativistic heavy ion collisions

et al. 2016

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“…Then in 2000, an analysis of the SPS heavy-ion experiment was done [6,7] which, by manifesting some of the important properties predicted for the QGP, showed the production of a new state of matter in Pb-Pb central collisions at √ s N N = 17.3GeV . Then there was further progress with the heavy-ion programme at the BNL RHIC [8,9] and the CERN SPS [10], which confirmed and fine-tuned the initial SPS results. The study of QCD at high temperatures embarked on a new age of precision measurements in 2010 with the start-up of LHC furnishing Pb-Pb collisions at the phenomenally high collision energies having magnitude far more than previously achieved.…”

Section: Introductionmentioning

confidence: 93%

Pion Fluctuation Study in Pb–Pb Collision at 2.76 TeV per Nucleon Pair from ALICE Experiment with Chaos and Complex Network-Based Methods

Bhaduri

Ghosh

2019

Phys. Part. Nuclei Lett.

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Chaos and complex-network based study is performed to look for signature of phase transition in Pb-Pb collision data sample at 2.76T eV per nucleon pair from ALICE Collaboration. The analysis is done on the pseudorapidity(η) values extracted from the data of AL-ICE experiment and the methods used are Multifractal-Detrended-Fluctuation-Analysis(MF-DFA), and a rigorous chaos-based, complex-network based method -Visibility-Graph(VG) analysis.The fractal behavior of pionisation process is studied by utilizing MF-DFA method for extracting the Hurst exponent and Multifractal-spectrum-width to analyze the scale-freeness and fractality inherent in the fluctuation pattern of η. Then VG method is used to analyze the fluctuation from a completely different perspective of complex network. This algorithm's scale-freeness detection mechanism to extract the Power-of-Scale-freeness-of-Visibility-Graph(PSVG), re-establishes the scale-freeness and fractality. Earlier, it has been shown that the scaling behavior is different from one hadron-nucleus(π − -AgBr(350 GeV)) to one nucleus-nucleus( 32 S-AgBr(200 A GeV)) interaction which is of comparatively higher total energy [1]. In this work, we have compared the fluctuation pattern in terms of 3 rigorous parameters -Multifractalspectrum-width, Hurst exponent and PSVG, between Pb-Pb(2.76T eV per nucleon pair) data and either of π − -AgBr(350 GeV) or 32 S-AgBr(200 A GeV) data, where both the interaction data are of significantly less energy than the ALICE data. We found that the values of the 3 parameters are substantially different for ALICE data compared to the other two interaction data. As remarkably different value of long-range-correlation indicates phase-transition, similar change in the fluctuation pattern in terms of these parameters can be attributed to a phase-transition and also the onset of QGP.

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“…The purple line illustrates a hypothetic caloric curve reflecting a first order phase transition. In addition, results from the HADES [37] and NA60 [40] experiments are shown. The NA60 data point is also extracted from the spectral slope above an invariant mass of 1 GeV/c 2 .…”

Section: Probing the Fireball Temperature With Di-leptonsmentioning

confidence: 99%

“…The purple line illustrates a hypothetical caloric curve reflecting a first order phase transition. In addition, the experiments result from HADES (High-Acceptance Di-Elektron Spectrometer) [37] and NA60 [40] are shown.…”

Section: Probing the Fireball Temperature With Di-leptonsmentioning

confidence: 99%

Astrophysics in the Laboratory—The CBM Experiment at FAIR

Senger

2020

Particles

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The future “Facility for Antiproton and Ion Research” (FAIR) is an accelerator-based international center for fundamental and applied research, which presently is under construction in Darmstadt, Germany. An important part of the program is devoted to questions related to astrophysics, including the origin of elements in the universe and the properties of strongly interacting matter under extreme conditions, which are relevant for our understanding of the structure of neutron stars and the dynamics of supernova explosions and neutron star mergers. The Compressed Baryonic Matter (CBM) experiment at FAIR is designed to measure promising observables in high-energy heavy-ion collisions, which are expected to be sensitive to the high-density equation-of-state (EOS) of nuclear matter and to new phases of Quantum Chromo Dynamics (QCD) matter at high densities. The CBM physics program, the relevant observables and the experimental setup will be discussed.

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Thermal Dileptons from Hot and Dense Strongly Interacting Matter

Abstract: Abstract. The NA60 experiment at the CERN SPS has studied muon-pair production in 158A GeV In-In collisions. The unprecedented precision of the data has allowed to isolate a strong excess of pairs above the known sources in the whole invariant mass region 0.2 Show more

Cited by 46 publications

References 16 publications

Properties of hot and dense matter from relativistic heavy ion collisions

Properties of hot and dense matter from relativistic heavy ion collisions

Pion Fluctuation Study in Pb–Pb Collision at 2.76 TeV per Nucleon Pair from ALICE Experiment with Chaos and Complex Network-Based Methods

Astrophysics in the Laboratory—The CBM Experiment at FAIR

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