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Beam energy and centrality dependence of the statistical moments of the net-charge and net-kaon multiplicity distributions in Au+Au collisions at STAR
Nuclear Experiment · Submitted 26 Oct 2012
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim The statistical moments of the multiplicity distributions of particles reflecting conserved quantities, such as net-charge and net-strangeness, are expected to depend sensitively on these correlation lengths, making them attractive tools in the search for a possible critical point.
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In part to search for a possible critical point (CP) in the phase diagram of hot nuclear matter, a Beam Energy Scan was performed at the Relativistic Heavy-Ion Collider at Brookhaven National Laboratory. The STAR experiment collected significant Au+Au data sets at beam energies, $\sqrt{{\rm s}_{\rm NN}}$, of 7.7, 11.5, 19.6, 27, 39, 62.4, and 200 GeV. Lattice and phenomenological calculations suggest that the presence of a CP might result in divergences of the thermodynamic susceptibilities and correlation length. The statistical moments of the multiplicity distributions of particles reflecting conserved quantities, such as net-charge and net-strangeness, are expected to depend sensitively on these correlation lengths, making them attractive tools in the search for a possible critical point. The centrality and beam-energy dependence of the statistical moments of the net-charge multiplicity distributions will be discussed. The observables studied include the lowest four statistical moments (mean, variance, skewness, kurtosis) and the products of these moments. The measured moments of the net-kaon multiplicity distributions will also be presented. These will be compared to the predictions from approaches lacking critical behavior, such as the Hadron Resonance Gas model and Poisson statistics.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | In part to search for a possible critical point (CP) in the phase diagram of hot nuclear matter, a Beam Energy Scan was performed at the Relativistic Heavy-Ion Collider at Brookhaven National Laboratory. | background 0.37 | 0.74 | 0.02 | asserted 0.66 |
| s1 | The STAR experiment collected significant Au+Au data sets at beam energies, $\sqrt{{\rm s}_{\rm NN}}$, of 7.7, 11.5, 19.6, 27, 39, 62.4, and 200 GeV. | method 0.97 | 0.94 | 0.02 | asserted 1.00 |
| s2 | Lattice and phenomenological calculations suggest that the presence of a CP might result in divergences of the thermodynamic susceptibilities and correlation length. | background 1.00 | 0.03 | 0.02 | hedged possibility 0.98 |
| s3 | The statistical moments of the multiplicity distributions of particles reflecting conserved quantities, such as net-charge and net-strangeness, are expected to depend sensitively on these correlation lengths, making them attractive tools in the search for a possible critical point. | background 0.99 | 0.04 | 0.04 | hedged possibility 0.57 |
| s4 | The centrality and beam-energy dependence of the statistical moments of the net-charge multiplicity distributions will be discussed. | contribution 0.99 | 0.44 | 0.04 | asserted 0.64 |
| s5 | The observables studied include the lowest four statistical moments (mean, variance, skewness, kurtosis) and the products of these moments. | contribution 0.69 | 0.62 | 0.03 | asserted 0.97 |
| s6 | The measured moments of the net-kaon multiplicity distributions will also be presented. | contribution 0.94 | 0.90 | 0.02 | asserted 0.92 |
| s7 | These will be compared to the predictions from approaches lacking critical behavior, such as the Hadron Resonance Gas model and Poisson statistics. | method 0.65 | 0.50 | 0.04 | asserted 0.71 |
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Original abstract
In part to search for a possible critical point (CP) in the phase diagram of hot nuclear matter, a Beam Energy Scan was performed at the Relativistic Heavy-Ion Collider at Brookhaven National Laboratory. The STAR experiment collected significant Au+Au data sets at beam energies, $\sqrt{{\rm s}_{\rm NN}}$, of 7.7, 11.5, 19.6, 27, 39, 62.4, and 200 GeV. Lattice and phenomenological calculations suggest that the presence of a CP might result in divergences of the thermodynamic susceptibilities and correlation length. The statistical moments of the multiplicity distributions of particles reflecting conserved quantities, such as net-charge and net-strangeness, are expected to depend sensitively on these correlation lengths, making them attractive tools in the search for a possible critical point. The centrality and beam-energy dependence of the statistical moments of the net-charge multiplicity distributions will be discussed. The observables studied include the lowest four statistical moments (mean, variance, skewness, kurtosis) and the products of these moments. The measured moments of the net-kaon multiplicity distributions will also be presented. These will be compared to the predictions from approaches lacking critical behavior, such as the Hadron Resonance Gas model and Poisson statistics.
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References
How the literature uses it
5 arXiv papers cite this in 6 sentences
Papers citing it · 3 sentences without a confident label
Uses its data or values 1 paper
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While for net-baryon number and net-strangeness related studies carried out in the STAR experiment, within $|η|$ $<$ 0.5, is through the measurement of net-protons and net-kaons in the range of 0.4 $<$ $p_T$ $<$ 0.8 GeV/$c$ and 0.2 $<$ $p_T$ $<$ 2.0 GeV/$c$, respectively [ref] .
Conserved number fluctuations in a hadron resonance gas model · Introduction · 0.84
Cites it as background 1 paper
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Several measurements of the higher-moments of net-proton, net-kaon, and net-charge distributions have been carried out [ref] .
First Study of the Negative Binomial Distribution Applied to Higher Moments of Net-charge and Net-proton Multiplicity Distributions · Introduction · 0.88
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