REVIEW 3 major objections 5 minor 1 cited by
Using FOPI flow and stopping data, the paper constrains the nucleon effective mass and the in-medium elastic cross-section factor to ≤15% uncertainty, while leaving the incompressibility K0 unconstrained.
Reviewed by Pith at T0; open to challenge. T0 means a machine referee read the full paper against a public rubric. the ladder, T0–T4 →
Bayesian fits to FOPI Au+Au flow and stopping data yield m*/m0 around 0.78-0.88 and F around 0.75-0.88, while K0 remains unconstrained.
T0 review reviewed 2026-08-05 challenge →
load-bearing objection Credible Bayesian extraction of m*/m0 and F from FOPI data with honest caveats, but the K0-prior sensitivity check is underreported. the 3 major comments →
Bayesian analysis of properties of nuclear matter with the FOPI experimental data
The pith
A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.
The reading
Core claim
The paper's central claim is that the combination of the directed-flow slope v11, the mid-rapidity elliptic flow v20, and the nuclear stopping observable vartl for free protons in 197Au+197Au collisions at 0.25 and 0.4 GeV/nucleon carries enough information to separate the nucleon effective mass m* from the constant in-medium correction factor F. After calibrating the UrQMD transport model to these FOPI data through a Gaussian-process emulator and MCMC sampling, the posterior for m*/m0 is 0.78 (+0.09/-0.10) at 0.25 GeV/nucleon and 0.88 (+0.03/-0.03) at 0.4 GeV/nucleon, while F is 0.75 (+0.08/-0.07) and 0.88 (+0.06/-0.07), respectively. The posterior for K0 stays near its Gaussian prior cente
What carries the argument
The central machinery is the UrQMD transport model with a Skyrme-type potential whose momentum dependence is tied to the nucleon effective mass m*, and an in-medium correction factor F = σ_medium^NN/σ_free^NN that multiplies the free-space nucleon-nucleon elastic cross section. A Gaussian-process emulator is trained on 150 UrQMD parameter sets spanning a wide grid in K0, m*, and F, then Markov-chain Monte Carlo sampling converts the mismatch between emulated and experimental observables into posterior distributions for the three parameters. The pivotal move is treating the constant F as an effective parameter that absorbs density and momentum dependence over the probed phase space.
Load-bearing premise
The load-bearing premise is that a single constant factor F, independent of density and momentum, can represent the in-medium nucleon-nucleon elastic cross section over the phase space probed; the paper itself says this approximation is 'probably not sufficient' and excludes high-transverse-momentum flow data because constant F cannot describe them.
What would settle it
A decisive check would be to repeat the same calibration with the same FOPI observables but replace the constant F by a density- and momentum-dependent parametrization of the in-medium cross section; if the recovered m*/m0 shifts by more than the quoted 1σ intervals, the extraction is an artifact of the constant-F assumption. A complementary test is to include the excluded high-transverse-momentum v1 and v2 data and ask whether any single F can still describe them; the paper predicts it cannot.
If this is right
- Any UrQMD-type simulation using m*/m0 outside roughly 0.7–0.9 or F outside roughly 0.7–0.9 at these beam energies will not reproduce the FOPI flow and stopping data simultaneously.
- The positive F–m* correlation and negative F–K0 correlation mean that stopping and integrated flow alone cannot cleanly separate the mean-field momentum dependence from the collision-term strength; the paper identifies v2n as a complementary observable that helps break this degeneracy.
- The non-constraint of K0 at these energies is itself a message: constraining the incompressibility will require higher-density probes or different observables, not just more statistics on these three quantities.
- The posterior validation on v2n indicates that the extracted central values generalize to a rapidity-dependent observable that was not part of the calibration.
- Including transverse-momentum-dependent flow data, which the paper excludes because constant F fails at high transverse momentum, is expected to tighten the constraints once a momentum-dependent F is introduced.
Where Pith is reading between the lines
- If the density region probed by these collisions expands with beam energy, the rise in m*/m0 from 0.78 to 0.88 and F from 0.75 to 0.88 could be read as a first glimpse of the density dependence of these quantities rather than a genuine energy dependence.
- A decisive extension would be to repeat the same Bayesian calibration at an intermediate energy, say 0.3 GeV/nucleon, or with different collision systems; a smooth trend would support the extraction, while strong system dependence would signal missing physics.
- Because the paper itself states that constant F is 'probably not sufficient' and cannot describe high-transverse-momentum flow data, the quoted intervals are conditional on that simplification; replacing F with a density- and momentum-dependent parametrization may shift the inferred m*.
- The K0 non-constraint may reflect the observables chosen rather than any intrinsic insensitivity of heavy-ion collisions: stopping and integrated flow appear to compensate for changes in K0 at these energies, whereas kaon production or higher-energy data could break that compensation.
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. The paper presents a Bayesian calibration of the UrQMD transport model to FOPI data for free protons in 197Au+197Au collisions at 0.25 and 0.4 GeV/nucleon, using the directed-flow slope v11, the mid-rapidity elliptic flow v20, and the stopping observable vartl. The parameters are K0, the nucleon effective mass m*/m0, and a constant in-medium correction factor F multiplying the free-space NN elastic cross section. A Gaussian-process emulator is trained on 150 UrQMD runs and tested on 20 held-out parameter sets. The reported results are m*/m0 = 0.78(+0.09/-0.10), F = 0.75(+0.08/-0.07) at 0.25 GeV/nucleon and m*/m0 = 0.88(+0.03/-0.03), F = 0.88(+0.06/-0.07) at 0.4 GeV/nucleon, with K0 effectively unconstrained. The posteriors are validated against rapidity-dependent v2n data not used in the fit.
Significance. If the reported constraints hold, the paper gives model-conditioned, quantitative bounds on the nucleon effective mass and the in-medium elastic cross-section correction at sub-saturation densities, a useful input for transport modeling and EoS studies. The strengths are the use of a 150-member training set, a held-out validation of the GP emulator (Fig. 7), and an independent validation against v2n data (Figs. 4-5). The internal Bayesian machinery is standard and, as far as presented, correctly executed. However, the headline uncertainty estimates depend on an informative prior for K0 in a way that is not quantitatively documented, and the likelihood contains no model-discrepancy term despite an acknowledged model deficiency. These issues make the central claim as currently stated premature.
major comments (3)
- [Sec. III, Eq. (5), Figs. 2-3] The paper replaces a uniform K0 prior with a Gaussian(240,60) prior and states that the uniform prior gives 'similar central values' for m* and F, but no numbers, distributions, or quantitative comparison are provided. This is a missing support. Because the posterior of K0 is close to its prior and Figs. 2-3 show a clear negative correlation between F and K0, the informative K0 prior can shrink or shift the joint posterior and thereby shrink or shift the marginalized m* and F intervals. The reported <=15% uncertainties may therefore be partly inherited from the prior rather than from FOPI data. Please report the uniform-prior posterior medians and 68% intervals for all three parameters, and ideally repeat the analysis with different prior widths (e.g., sigma = 40, 60, 80 MeV) to demonstrate robustness.
- [Appendix, Eqs. (5)-(6)] The likelihood uses only experimental and emulator variances in Sigma; there is no model-discrepancy term. The model is knowingly incomplete: Sec. I states the constant-F approximation is 'probably not sufficient', and Sec. IV says high-transverse-momentum flow data cannot be reproduced with constant F, which is why those data are excluded. A model with a known, excluded failure mode should not be treated as exact except for emulator noise, or the 68% credible intervals will be overconfident. Please add a model-discrepancy term (e.g., an extra variance parameter learned from the data or set by validation) or at least show how the posterior widths change if an additional 10-20% systematic error is included in the covariance.
- [Secs. I and IV] The central claim that m* and F are 'tightly constrained' is model-conditioned on a single density- and momentum-independent F over the selected observables. The paper itself states that this approximation 'is probably not sufficient' and that high-pT flow data are excluded because constant F fails. Under this assumption, the inferred F is an effective average over the probed phase space, and the positive F--m* correlation seen in Figs. 2-3 means that misspecification of F can propagate directly into the m* posterior. Please temper the claim to 'constrained within the UrQMD model family with constant F', and discuss whether a density/momentum-dependent F would change the central values. A concrete test would be to run the same Bayesian analysis with F parametrized as, e.g., F(rho) or F(sqrt(s)), even if only for a subset of observables, to quantify the bias risk.
minor comments (5)
- [Eq. (5)] The likelihood is written as exp[-1/2 (theta - yexp)^T Sigma^-1 (theta - yexp)], but theta is the parameter vector in Eq. (4); the model prediction should be denoted y(theta) or mu(theta). This is a notation error that can confuse readers.
- [Fig. 7 caption] The caption is garbled in the text (likely a font-encoding issue during extraction) and does not list which observables are shown. Please regenerate the figure/caption so that the axis labels and the legend are legible and the observables are identified.
- [Table I] For the 0.25 GeV/nucleon vartl row, 'b 0 < 0.15' has a spurious space. More importantly, the table would benefit from a column indicating the number of events or statistical uncertainty used in the fit; currently only the experimental values are listed.
- [Ref. [76]] Reference [76] is cited as 'to be submitted'. If the exclusion of high-pT data relies on that work, please provide a preprint/DOI or remove the citation; otherwise the statement in Sec. IV is not checkable.
- [Fig. 6] The caption says the filled bands are produced by random sampling 'within the stated uncertainty ranges', but it is not clear whether those ranges are 68% or another confidence level. Please state the confidence level used for the literature constraints so that the comparison in Fig. 6 is quantitative.
Circularity Check
Main inference is data-driven; the v2n validation is partially in-sample, and K0-prior robustness is under-reported.
specific steps
-
fitted input called prediction
[Sec. II (definition of v2n) and Sec. III (validation with v2n)]
"the quantity v2n defined by v2n = |v20| + |v22| is quite sensitive to the incompressibility K0 and the in-medium nucleon–nucleon elastic cross section, thus v2n is used to validate the inferred results from Bayesian analysis."
v20 is one of the observables explicitly used in the Bayesian likelihood (Table I lists −v20 for multiple centralities and ut0 cuts). Since v2n = |v20| + |v22|, the validation quantity contains a fitted component: the mid-rapidity elliptic flow v20 is part of the data that constrained m*, F, and K0. Thus the agreement of v2n with FOPI data is partly guaranteed by construction; only the v22 component provides genuinely out-of-sample information. The paper's statement that v2n 'is not used for Bayesian analysis' is therefore true only for the composite observable, not for its dominant component.
full rationale
The central Bayesian extraction of m*, F, and K0 is not circular: the posterior is conditioned on FOPI v11, v20, and vartl data, with uniform priors on m* and F. The reported m*/m0 and F intervals are genuine data-driven inferences within the UrQMD model space, not re-statements of the priors. The K0 Gaussian prior is informative, and the paper reports a uniform-prior check with 'similar central values' but provides no quantitative comparison; this is an under-reported robustness limitation, but it is not circularity. Self-citations to the Huzhou-group UrQMD model are model inputs, not derived results. The only identifiable circular element is the v2n validation, which includes the fitted v20; this partial in-sample check does not affect the main m*/F constraint conclusion.
Axiom & Free-Parameter Ledger
free parameters (4)
- K0 =
234.86(+59.60/-63.56) MeV at 0.25 A GeV; 226.65(+55.65/-50.42) MeV at 0.4 A GeV
- m*/m0 =
0.78(+0.09/-0.10) at 0.25 A GeV; 0.88(+0.03/-0.03) at 0.4 A GeV
- F =
0.75(+0.08/-0.07) at 0.25 A GeV; 0.88(+0.06/-0.07) at 0.4 A GeV
- K0 prior mean and width =
240 +/- 60 MeV
axioms (5)
- domain assumption The modified UrQMD transport model accurately describes the dynamics of Au+Au collisions at 0.25 and 0.4 A GeV.
- domain assumption The Gaussian process emulator faithfully reproduces UrQMD outputs for the observables used.
- ad hoc to paper A single constant F is sufficient to describe the in-medium NN elastic cross-section modification for the selected observables.
- ad hoc to paper The K0 prior is Gaussian with mean 240 MeV and width 60 MeV.
- domain assumption The likelihood need only include experimental and emulator errors, with no model discrepancy.
Cite this review
Pith. "Pith review of Bayesian analysis of properties of nuclear matter with the FOPI experimental data." pith.science (2026). https://pith.science/paper/FV7KX52G
@misc{pith2026250903406,
author = {Pith},
title = {Pith review of: Bayesian analysis of properties of nuclear matter with the FOPI experimental data},
year = {2026},
howpublished = {\url{https://pith.science/paper/FV7KX52G}},
note = {Machine review of arXiv:2509.03406}
}
abstract
Based on the ultra-relativistic quantum molecular dynamics (UrQMD) transport model, combined with experimental data of directed flow, elliptic flow, and nuclear stopping power measured by FOPI in $\rm ^{197}Au+^{197}Au$ collisions at beam energies ($E_{lab}$) of 0.25 and 0.4 GeV/nucleon, the incompressibility of the nuclear equation of state $K_0$, the nucleon effective mass $m^*$, and the in-medium correction factor ($F$, with respect to free-space values) on the nucleon-nucleon elastic cross sections are studied by Bayesian analysis. It is found that both $m^*$ and $F$ can be tightly constrained with the uncertainty $\le$ 15\%, however, $K_0$ cannot be constrained tightly. We deduce $m^*/m_0 = 0.78^{+0.09}_{-0.10}$ and $F = 0.75^{+0.08}_{-0.07}$ with experimental data at $E_{lab}$ = 0.25 GeV/nucleon, and the obtained values increased to $m^*/m_0 = 0.88^{+0.03}_{-0.03}$ and $F = 0.88^{+0.06}_{-0.07}$ at $E_{lab}$ = 0.4 GeV/nucleon. The obtained results are further verified with rapidity-dependent flow data.
Figures
Forward citations
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Reference graph
Works this paper leans on
-
[1]
C. Drischler, J. W. Holt, C. Wellenhofer, Chiral Effective Field Theory and the High-Density Nuclear Equation of State, Ann. Rev. Nucl. Part. Sci. 71 (2021) 403–432. arXiv:2101.01709, doi:10.1146/ annurev-nucl-102419-041903
Pith/arXiv arXiv 2021
-
[2]
Transport approaches for the Description of Intermediate-Energy Heavy-Ion Collisions
J. Xu, Transport approaches for the description of intermediate-energy heavy-ion collisions, Prog. Part. Nucl. Phys. 106 (2019) 312–359. arXiv:1904.00131, doi:10.1016/j.ppnp.2019.02.009. 7
work page internal anchor Pith review Pith/arXiv arXiv 2019
-
[3]
B. Li, L. Chen, C. M. Ko, Recent Progress and New Challenges in Isospin Physics with Heavy-Ion Reactions, Phys. Rept. 464 (2008) 113–281.arXiv:0804.3580, doi: 10.1016/j.physrep.2008.04.005
Pith/arXiv arXiv 2008
-
[4]
Sorensen, et al., Dense nuclear matter equation of state from heavy-ion collisions, Prog
A. Sorensen, et al., Dense nuclear matter equation of state from heavy-ion collisions, Prog. Part. Nucl. Phys. 134 (2024) 104080. arXiv:2301.13253, doi:10.1016/j. ppnp.2023.104080
Pith/arXiv arXiv 2024
-
[5]
S. Huth, et al., Constraining Neutron-Star Matter with Microscopic and Macroscopic Collisions, Nature 606 (2022) 276–280. arXiv:2107.06229, doi:10.1038/ s41586-022-04750-w
Pith/arXiv arXiv 2022
-
[6]
C. Y. Tsang, et al., Constraining nucleon effective masses with flow and stopping observables from the S πRIT experiment, Phys. Lett. B 853 (2024) 138661. arXiv: 2312.06678, doi:10.1016/j.physletb.2024.138661
Pith/arXiv arXiv 2024
-
[7]
C. Y. Tsang, M. B. Tsang, W. G. Lynch, R. Kumar, C. J. Horowitz, Determination of the equation of state from nuclear experiments and neutron star observations, Nature Astron. 8 (3) (2024) 328–336.arXiv:2310.11588, doi:10.1038/s41550-023-02161-z
Pith/arXiv arXiv 2024
-
[8]
P. Danielewicz, R. Lacey, W. G. Lynch, Determination of the equation of state of dense matter, Science 298 (5598) (2002) 1592–1596. arXiv:https://www. science.org/doi/pdf/10.1126/science.1078070, doi:10.1126/science.1078070. URL https://www.science.org/doi/abs/10.1126/ science.1078070
-
[9]
Wolter, et al., Transport model comparison studies of intermediate-energy heavy-ion collisions, Prog
H. Wolter, et al., Transport model comparison studies of intermediate-energy heavy-ion collisions, Prog. Part. Nucl. Phys. 125 (2022) 103962.arXiv:2202.06672, doi: 10.1016/j.ppnp.2022.103962
arXiv 2022
-
[10]
U. Garg, G. Colò, The compression-mode giant resonances and nuclear incompressibility, Prog. Part. Nucl. Phys. 101 (2018) 55–95.arXiv:1801.03672, doi: 10.1016/j.ppnp.2018.03.001
work page internal anchor Pith review Pith/arXiv arXiv 2018
-
[11]
J. Xu, Z. Zhang, B.-A. Li, Bayesian uncertainty quantification for nuclear matter incompressibility, Phys. Rev. C 104 (5) (2021) 054324.arXiv:2107.10962, doi: 10.1103/PhysRevC.104.054324
work page internal anchor Pith review Pith/arXiv arXiv 2021
-
[12]
Z.Z.Li, Y.F.Niu, G.Colò, TowardaUnifiedDescription of Isoscalar Giant Monopole Resonances in a Self- Consistent Quasiparticle-Vibration Coupling Approach, Phys. Rev. Lett. 131 (8) (2023) 082501. arXiv:2211. 01264, doi:10.1103/PhysRevLett.131.082501
-
[13]
Probing the Nuclear Symmetry Energy with Heavy Ion Collisions
M. Di Toro, V. Baran, M. Colonna, V. Greco, Probing the Nuclear Symmetry Energy with Heavy Ion Collisions, J. Phys. G 37 (2010) 083101. arXiv:1003.2957, doi: 10.1088/0954-3899/37/8/083101
work page internal anchor Pith review Pith/arXiv arXiv 2010
-
[14]
C. Hartnack, H. Oeschler, J. Aichelin, Hadronic matter is soft, Physical review letters 96 (1) (2006) 012302.doi: 10.1103/PhysRevLett.96.012302
-
[15]
C.T.Sturm, etal., Evidenceforasoftnuclearequationof state from kaon production in heavy ion collisions, Phys. Rev. Lett. 86 (2001) 39–42. arXiv:nucl-ex/0011001, doi:10.1103/PhysRevLett.86.39
work page internal anchor Pith review Pith/arXiv arXiv 2001
-
[16]
Probing the nuclear equation of state by $K^+$ production in heavy ion collisions
C. Fuchs, A. Faessler, E. Zabrodin, Y.-M. Zheng, Probing the nuclear equation of state by K+ production in heavy ion collisions, Phys. Rev. Lett. 86 (2001) 1974–1977. arXiv:nucl-th/0011102, doi:10.1103/ PhysRevLett.86.1974
work page internal anchor Pith review Pith/arXiv arXiv 2001
-
[17]
A. Le Fèvre, Y. Leifels, W. Reisdorf, J. Aichelin, C. Hartnack, Constraining the nuclear matter equation of state around twice saturation density, Nucl. Phys. A 945 (2016) 112–133. arXiv:1501.05246, doi:10.1016/ j.nuclphysa.2015.09.015
Pith/arXiv arXiv 2016
-
[18]
Y. Wang, C. Guo, Q. Li, A. Le Fèvre, Y. Leifels, W. Trautmann, Determination of the nuclear incom- pressibility from the rapidity-dependent elliptic flow in heavy-ion collisions at beam energies 0.4 A –1.0 A GeV, Phys. Lett. B 778 (2018) 207–212. arXiv:1804.04293, doi:10.1016/j.physletb.2018.01.035
Pith/arXiv arXiv 2018
-
[19]
M. Oertel, M. Hempel, T. Klähn, S. Typel, Equations of state for supernovae and compact stars, Rev. Mod. Phys. 89 (1) (2017) 015007. arXiv:1610.03361, doi: 10.1103/RevModPhys.89.015007
Pith/arXiv arXiv 2017
-
[20]
P. T. H. Pang, et al., An updated nuclear-physics and multi-messenger astrophysics framework for binary neu- tron star mergers, Nature Commun. 14 (1) (2023) 8352. arXiv:2205.08513, doi:10.1038/s41467-023-43932-6
Pith/arXiv arXiv 2023
-
[21]
H. Koehn, et al., From existing and new nuclear and astrophysical constraints to stringent limits on the equation of state of neutron-rich dense matter (2 2024). arXiv:2402.04172
Pith/arXiv arXiv 2024
-
[22]
Impact of the nuclear equation of state on the formation of twin stars
N.-B. Zhang, B.-A. Li, Impact of the nuclear equation of state on the formation of twin stars (6 2024).arXiv: 2406.07396
work page internal anchor Pith review Pith/arXiv arXiv 2024
-
[23]
K. Chatziioannou, H. T. Cromartie, S. Gandolfi, I. Tews, D. Radice, A. W. Steiner, A. L. Watts, Neutron stars and the dense matter equation of state: from microscopic theory to macroscopic observations (7 2024). arXiv: 2407.11153
arXiv 2024
-
[24]
A. C. Semposki, C. Drischler, R. J. Furnstahl, J. A. Melendez, D. R. Phillips, From chiral EFT to perturbative QCD: a Bayesian model mixing approach to symmetric nuclear matter (4 2024).arXiv:2404.06323
Pith/arXiv arXiv 2024
-
[25]
F. Sammarruca, T. Ajagbonna, General features of the stellar matter equation of state from microscopic theory, new maximum-mass constraints, and causality (12 2024). arXiv:2501.00668
work page internal anchor Pith review Pith/arXiv arXiv 2024
-
[26]
Symmetry energy investigation with pion production from Sn+Sn systems
G. Jhang, et al., Symmetry energy investigation with pion production from Sn+Sn systems, Phys. Lett. B 813 (2021) 136016. arXiv:2012.06976, doi:10.1016/j. physletb.2020.136016
work page internal anchor Pith review Pith/arXiv arXiv 2021
-
[27]
J. Xu, et al., Understanding transport simulations of heavy-ion collisions at 100A and 400A MeV: Comparison of heavy-ion transport codes under controlled conditions, Phys. Rev. C 93 (4) (2016) 044609.arXiv:1603.08149, doi:10.1103/PhysRevC.93.044609
work page internal anchor Pith review Pith/arXiv arXiv 2016
-
[28]
Comparison of heavy-ion transport simulations: Collision integral in a box
Y.-X. Zhang, et al., Comparison of heavy-ion transport simulations: Collision integral in a box, Phys. Rev. C 97 (3) (2018) 034625.arXiv:1711.05950, doi:10.1103/ PhysRevC.97.034625
work page internal anchor Pith review Pith/arXiv arXiv 2018
-
[29]
A. Ono, et al., Comparison of heavy-ion transport simulations: Collision integral with pions and ∆ resonances in a box, Phys. Rev. C 100 (4) (2019) 044617. arXiv:1904.02888, doi:10.1103/PhysRevC. 100.044617
work page internal anchor Pith review Pith/arXiv arXiv 2019
-
[30]
Comparison of Heavy-Ion Transport Simulations: Mean-field Dynamics in a Box
M. Colonna, et al., Comparison of heavy-ion transport simulations: Mean-field dynamics in a box, Phys. Rev. C 104 (2) (2021) 024603. arXiv:2106.12287, doi:10. 1103/PhysRevC.104.024603
work page internal anchor Pith review Pith/arXiv arXiv 2021
-
[31]
B. Gao, Y. Wang, Z. Gao, Q. Li, Elliptic flow in heavy- ion collisions at intermediate energy: The role of impact parameter, meanfieldpotential, andcollisionterm, Phys. Lett. B 838 (2023) 137685.arXiv:2210.08213, doi:10. 1016/j.physletb.2023.137685. 8
work page internal anchor Pith review Pith/arXiv arXiv 2023
-
[32]
Y. Wang, B. Gao, G. Wei, P. Li, Q. Li, Time evolution of elliptic flow and medium density in heavy-ion collisions at intermediate energies, Phys. Rev. C 110 (4) (2024) 044606. doi:10.1103/PhysRevC.110.044606
-
[33]
Y.-Y. Liu, J.-P. Yang, Y.-J. Wang, Q.-F. Li, Z.-X. Li, C.-J. Xia, Y.-X. Zhang, A perspective on describing nucleonic flow and pionic observables within the ultra- relativistic quantum molecular dynamics model, Nuclear Science and Techniques 36 (3) (2025) 45.doi:10.1007/ s41365-024-01607-x. URL https://doi.org/10.1007/s41365-024-01607-x
-
[34]
A. Andronic, J. Lukasik, W. Reisdorf, W. Trautmann, Systematics of Stopping and Flow in Au+Au Collisions, Eur. Phys. J. A 30 (2006) 31–46. arXiv:nucl-ex/ 0608015, doi:10.1140/epja/i2006-10101-2
-
[35]
J. Adamczewski-Musch, et al., Charged-pion production in Au + Au collisions at √sNN = 2 .4 GeV: HADES Collaboration, Eur.Phys.J.A56(10)(2020)259. arXiv: 2005.08774, doi:10.1140/epja/s10050-020-00237-2
Pith/arXiv arXiv 2020
-
[36]
Analysis Note: Directed flow $v_1$ of protons in the Xe+Cs(I) collisions at 3.8 AGeV
M. Mamamev, A. Taranenko, A. Demanov, P. Parfenov, V. Troshin, Analysis Note: Directed flowv1 of protons in the Xe+Cs(I) collisions at 3.8 AGeV (12 2024).arXiv: 2412.08570
work page internal anchor Pith review Pith/arXiv arXiv 2024
-
[37]
S. R. Sharma, First-Order Event Plane Correlated Di- rected and Triangular Flow from Fixed-Target Energies at RHIC-STAR, Universe 10 (3) (2024) 118. arXiv: 2312.02666, doi:10.3390/universe10030118
work page internal anchor Pith review Pith/arXiv arXiv 2024
-
[38]
Dynamics of clusters and fragments in heavy-ion collisions
A. Ono, Dynamics of clusters and fragments in heavy-ion collisions, Prog. Part. Nucl. Phys. 105 (2019) 139–179. arXiv:1903.00608, doi:10.1016/j.ppnp.2018.11.001
work page internal anchor Pith review Pith/arXiv arXiv 2019
-
[39]
M. Bleicher, E. Bratkovskaya, Modelling relativistic heavy-ion collisions with dynamical transport ap- proaches, Prog. Part. Nucl. Phys. 122 (2022) 103920. doi:10.1016/j.ppnp.2021.103920
-
[40]
B.Li, B.Cai, L.Chen, J.Xu, NucleonEffectiveMassesin Neutron-Rich Matter, Prog. Part. Nucl. Phys. 99 (2018) 29–119. arXiv:1801.01213, doi:10.1016/j.ppnp.2018. 01.001
Pith/arXiv arXiv 2018
-
[41]
S. C. Han, X. L. Shang, W. Zuo, G. C. Yong, Y. Gao, In- medium nucleon-nucleon cross section in nuclear matter, Phys. Rev. C 106 (6) (2022) 064332. doi:10.1103/ PhysRevC.106.064332
2022
-
[42]
Y. Cui, Y. Zhang, Z. Li, In-medium NN → N∆ cross section and its dependence on effective Lagrange parameters in isospin-asymmetric nuclear matter, Chin. Phys. C 43 (2) (2019) 024105.arXiv:1801.05960, doi: 10.1088/1674-1137/43/2/024105
work page internal anchor Pith review Pith/arXiv arXiv 2019
-
[43]
Y. D. Song, R. Wang, Z. Zhang, Y. G. Ma, In-medium nucleon-nucleon cross sections from characteristics of nuclear giant resonances and nuclear stopping power, Phys. Rev. C 108 (6) (2023) 064603. doi:10.1103/ PhysRevC.108.064603
work page 2023
- [44]
-
[45]
B.-A. Li, W.-J. Xie, Evolution of in-medium baryon- baryon scattering cross sections and stiffness of dense nuclear matter from Bayesian analyses of FOPI proton- flow excitation functions, Phys. Rev. C 111 (5) (2025) 054602. arXiv:2501.02579, doi:10.1103/PhysRevC. 111.054602
work page internal anchor Pith review Pith/arXiv arXiv 2025
-
[46]
Y. Gal, P. Koumoutsakos, F. Lanusse, G. Louppe, C. Papadimitriou, Bayesian uncertainty quantification for machine-learned models in physics, Nature Re- views Physics 4 (9) (2022) 573–577. doi:10.1038/ s42254-022-00498-4
work page 2022
-
[47]
M. D. Cozma, Equation of state of nuclear matter from collective flows and stopping in intermediate-energy heavy-ion collisions, Phys. Rev. C 110 (2024) 064911. doi:10.1103/PhysRevC.110.064911
-
[48]
M. Omana Kuttan, J. Steinheimer, K. Zhou, H. Stoecker, QCD Equation of State of Dense Nuclear Matter from a Bayesian Analysis of Heavy-Ion Collision Data, Phys. Rev. Lett. 131 (20) (2023) 202303. arXiv:2211.11670, doi:10.1103/PhysRevLett.131.202303
Pith/arXiv arXiv 2023
-
[49]
J. E. Bernhard, Bayesian parameter estimation for relativistic heavy-ion collisions, Ph.D. thesis, Duke U. (4 2018). arXiv:1804.06469
Pith/arXiv arXiv 2018
-
[50]
J. M. Wang, X. G. Deng, W. J. Xie, B. A. Li, Y. G. Ma, Bayesian inference of nuclear incompressibility from proton elliptic flow in central Au+Au collisions at 400 MeV/nucleon (6 2024).arXiv:2406.07051
Pith/arXiv arXiv 2024
-
[51]
W. Reisdorf, H. Ritter, Collective flow in heavy-ion collisions, Annual Review of Nuclear and Particle Science 47 (1) (1997) 663–709.doi:10.1146/annurev.nucl.47. 1.663
-
[52]
N. Herrmann, J. P. Wessels, T. Wienold, Collective flow in heavy-ion collisions, Annual Review of Nuclear and Particle Science 49 (1) (1999) 581–632. doi:10.1146/ annurev.nucl.47.1.663
work page 1999
-
[53]
U. Heinz, R. Snellings, Collective flow and viscosity in relativistic heavy-ion collisions, Ann. Rev. Nucl. Part. Sci. 63 (2013) 123–151.arXiv:1301.2826, doi:10.1146/ annurev-nucl-102212-170540
Pith/arXiv arXiv 2013
- [54]
-
[55]
H. Elfner, B. Müller, The exploration of hot and dense nuclear matter: introduction to relativistic heavy-ion physics, J. Phys. G 50 (10) (2023) 103001. arXiv: 2210.12056, doi:10.1088/1361-6471/ace824
Pith/arXiv arXiv 2023
- [56]
-
[57]
W. Reisdorf, et al., Systematics of azimuthal asymme- tries in heavy ion collisions in the 1 A GeV regime, Nucl. Phys. A 876 (2012) 1–60.arXiv:1112.3180, doi: 10.1016/j.nuclphysa.2011.12.006
Pith/arXiv arXiv 2012
-
[58]
W. Reisdorf, A. Andronic, A. Gobbi, O. N. Hartmann, N. Herrmann, K. D. Hildenbrand, Y. J. Kim, M. Kirejczyk, P. Koczoń, T. Kress, Y. Leifels, A. Schüttauf, Z. Tymiński, Z. G. Xiao, J. P. Alard, V. Barret, Z. Basrak, N. Bastid, M. L. Benabderrahmane, R. Čaplar, P. Crochet, P. Dupieux, M. Dželalija, Z. Fodor, Y. Grishkin, B. Hong, J. Kecskemeti, M. Korolija...
work page 2004
-
[59]
Lehaut, et al., Study of Nuclear Stopping in Central Collisions at Intermediate Energies, Phys
G. Lehaut, et al., Study of Nuclear Stopping in Central Collisions at Intermediate Energies, Phys. Rev. Lett. 104 (2010) 232701. doi:10.1103/PhysRevLett.104.232701
-
[60]
In-medium effects for nuclear matter in the Fermi energy domain
O. Lopez, et al., In-medium effects for nuclear matter in the Fermi energy domain, Phys. Rev. C 90 (6) (2014) 064602, [Erratum: Phys.Rev.C 90, 069903 (2014)]. arXiv:1409.0735, doi:10.1103/PhysRevC.90.064602
work page internal anchor Pith review Pith/arXiv arXiv 2014
-
[61]
Reisdorf, et al., Systematics of central heavy ion collisions in the 1A GeV regime, Nucl
W. Reisdorf, et al., Systematics of central heavy ion collisions in the 1A GeV regime, Nucl. Phys. A 848 (2010) 366–427. arXiv:1005.3418, doi:10.1016/j.nuclphysa. 2010.09.008
Pith/arXiv arXiv 2010
-
[62]
Q. Li, C. Shen, C. Guo, Y. Wang, Z. Li, J. Lukasik, W. Trautmann, Nonequilibrium dynamics in heavy- ion collisions at low energies available at the GSI Schwerionen Synchrotron, Phys. Rev. C 83 (2011) 044617. doi:10.1103/PhysRevC.83.044617
-
[63]
Y. Wang, C. Guo, Q. Li, H. Zhang, Z. Li, W. Trautmann, Collective flows of light particles in the Au+Au collisions at intermediate energies, Phys. Rev. C 89 (3) (2014) 034606. arXiv:1305.4730, doi:10.1103/PhysRevC.89. 034606
work page internal anchor Pith review Pith/arXiv arXiv 2014
-
[64]
Y. Wang, Q. Li, Application of microscopic transport model in the study of nuclear equation of state from heavy ion collisions at intermediate energies, Front. Phys. (Beijing) 15 (4) (2020) 44302. doi:10.1007/ s11467-020-0964-6
work page 2020
-
[65]
P. Li, Y. Wang, Q. Li, C. Guo, H. Zhang, Effects of the in-medium nucleon-nucleon cross section on collective flow and nuclear stopping in heavy-ion collisions in the Fermi-energy domain, Phys. Rev. C 97 (4) (2018) 044620. arXiv:1804.04288, doi:10.1103/PhysRevC.97.044620
Pith/arXiv arXiv 2018
-
[66]
Determination of the Mean-Field Momentum-Dependence using Elliptic Flow
P. Danielewicz, Determination of the mean field momentum dependence using elliptic flow, Nucl. Phys. A 673 (2000) 375–410. arXiv:nucl-th/9912027, doi: 10.1016/S0375-9474(00)00083-X
work page internal anchor Pith review Pith/arXiv arXiv 2000
-
[67]
P. Li, Y. Wang, Q. Li, H. Zhang, Accessing the in- medium effects on nucleon-nucleon elastic cross section with collective flows and nuclear stopping, Phys. Lett. B 828 (2022) 137019. arXiv:2203.05855, doi:10.1016/j. physletb.2022.137019
work page internal anchor Pith review Pith/arXiv arXiv 2022
-
[68]
C. Hartnack, H. Oeschler, Y. Leifels, E. L. Bratkovskaya, J. Aichelin, Strangeness Production close to Threshold in Proton-Nucleus and Heavy-Ion Collisions, Phys. Rept. 510 (2012) 119–200. arXiv:1106.2083, doi:10.1016/j. physrep.2011.08.004
Pith/arXiv arXiv 2012
-
[69]
A. Le Fèvre, Y. Leifels, C. Hartnack, J. Aichelin, Origin ofellipticflowanditsdependenceontheequationofstate in heavy ion reactions at intermediate energies, Phys. Rev. C 98 (3) (2018) 034901. arXiv:1611.07500, doi: 10.1103/PhysRevC.98.034901
Pith/arXiv arXiv 2018
-
[70]
H. Du, G.-F. Wei, G.-C. Yong, Directed and elliptic flows of protons and deuterons in HADES Au+Au collisions at sNN=2.4 GeV, Phys. Lett. B 839 (2023) 137823.arXiv: 2302.07037, doi:10.1016/j.physletb.2023.137823
work page internal anchor Pith review Pith/arXiv arXiv 2023
-
[71]
V. Kireyeu, V. Voronyuk, M. Winn, S. Gläßel, J. Aichelin, C. Blume, E. Bratkovskaya, G. Coci, J. Zhao, Constraints on the equation-of-state from low energy heavy-ion collisions within the PHQMD microscopic approach with momentum-dependent potential (11 2024). arXiv:2411.04969
Pith/arXiv arXiv 2024
-
[72]
P. Li, Y. Wang, Q. Li, H. Zhang, Collective flow and nuclear stopping in heavy ion collisions in Fermi energy domain, Nucl. Sci. Tech. 29 (12) (2018) 177. doi:10. 1007/s41365-018-0510-1
work page 2018
-
[73]
X. Deng, D. Fang, Y. Ma, Shear viscosity of nucleonic matter, Prog. Part. Nucl. Phys. 136 (2024) 104095. arXiv:2401.02293, doi:10.1016/j.ppnp.2023.104095
work page internal anchor Pith review Pith/arXiv arXiv 2024
-
[74]
M. Isse, A. Ohnishi, N. Otuka, P. K. Sahu, Y. Nara, Mean-field effects on collective flows in high-energy heavy-ion collisions from AGS to SPS energies, Phys. Rev. C 72 (2005) 064908.arXiv:nucl-th/0502058, doi: 10.1103/PhysRevC.72.064908
Pith/arXiv arXiv 2005
-
[75]
Directed flow in Au+Au, Xe+CsI and Ni+Ni collisions and the nuclear equation of state
A. Andronic, et al., Directed flow in Au + Au, Xe + CsI and Ni + Ni collisions and the nuclear equation of state, Phys.Rev.C67(2003)034907. arXiv:nucl-ex/0301009, doi:10.1103/PhysRevC.67.034907
work page internal anchor Pith review Pith/arXiv arXiv 2003
- [76]
-
[77]
Yang, et al., Bayesian analysis on interactions of exotic nuclear systems, Phys
L. Yang, et al., Bayesian analysis on interactions of exotic nuclear systems, Phys. Lett. B 807 (2020) 135540.doi: 10.1016/j.physletb.2020.135540
-
[78]
H. Mäntysaari, B. Schenke, C. Shen, W. Zhao, Bayesian inference of the fluctuating proton shape, Phys. Lett. B 833 (2022) 137348. arXiv:2202.01998, doi:10.1016/j. physletb.2022.137348
Pith/arXiv arXiv 2022
-
[79]
Everett, et al., Multisystem Bayesian constraints on the transport coefficients of QCD matter, Phys
D. Everett, et al., Multisystem Bayesian constraints on the transport coefficients of QCD matter, Phys. Rev. C 103(5)(2021)054904. arXiv:2011.01430, doi:10.1103/ PhysRevC.103.054904
Pith/arXiv arXiv 2021
-
[80]
Y. Wang, Q. Li, Machine learning transforms the inference of the nuclear equation of state, Front. Phys. (Beijing) 18 (6) (2023) 64402.arXiv:2305.16686, doi: 10.1007/s11467-023-1313-3
Pith/arXiv arXiv 2023
This paper was first reviewed by deepseek-v4-flash on August 5, 2026.
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