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Article
Enhanced Dilepton production near the color superconducting phase and the QCD critical point
The dilepton production yields in relativistic heavy ion collisions are investigated along isentropic trajectories in the quark (Wigner) phase within the two-flavor Nambu-Jona-Lasinio model. An enhancement of ...
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Article
Open AccessModel dependence of the number of participant nucleons and observable consequences in heavy-ion collisions
The centrality determination and the estimated fluctuations of number of participant nucleons \(N_{part}\)
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Article
Effects of a phase transition on two-pion interferometry in heavy ion collisions at \(\sqrt {{s_{{\rm{NN}}}}} = 2.4 - 7.7\,\,{\rm{GeV}}\)
Hanbury-Brown-Twiss (HBT) correlations for charged pions in central Au+Au collisions at \(\sqrt {{s_{{\rm{NN}}}}} = 2.4 - 7.7\) ...
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Article
Open AccessThe high-density equation of state in heavy-ion collisions: constraints from proton flow
A set of different equations of state is implemented in the molecular dynamics part of a non-equilibrium transport simulation (UrQMD) of heavy-ion collisions. It is shown how different flow observables are aff...
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Article
Open AccessHarmonic flow correlations in Au+Au reactions at 1.23 AGeV: a new testing ground for the equation-of-state and expansion geometry
Correlations between the harmonic flow coefficients \(v_1\) v 1 ...
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Article
Open AccessA chiral mean-field equation-of-state in UrQMD: effects on the heavy ion compression stage
It is shown that the initial compression in central heavy ion collisions at beam energies of \(E_{\mathrm {lab}}=1-10A\) ...
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Article
Open AccessShared Data and Algorithms for Deep Learning in Fundamental Physics
We introduce a Python package that provides simple and unified access to a collection of datasets from fundamental physics research—including particle physics, astroparticle physics, and hadron- and nuclear physi...
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Article
Open AccessAn equation-of-state-meter for CBM using PointNet
A novel method for identifying the nature of QCD transitions in heavy-ion collision experiments is introduced. PointNet based Deep Learning (DL) models are developed to classify the equation of state (EoS) tha...
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Article
Open AccessIdentifying the nature of the QCD transition in relativistic collision of heavy nuclei with deep learning
Using deep convolutional neural network (CNN), the nature of the QCD transition can be identified from the final-state pion spectra from hybrid model simulations of heavy-ion collisions that combines a viscous...
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Chapter and Conference Paper
Influence of Centrality Definition and Detector Efficiency on the Net-Proton Kurtosis
We study the influence of the centrality and detector efficiency on the net-proton kurtosis for minimum bias Au \(+\) Au collisions at a beam energy of \(\sqrt{s_{\mathrm {NN}}}= 7.7\) GeV by using the UrQMD ...
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Article
Open AccessA machine learning study to identify spinodal clum** in high energy nuclear collisions
The coordinate and momentum space configurations of the net baryon number in heavy ion collisions that undergo spinodal decomposition, due to a first-order phase transition, are investigated using state-of-the...
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Article
Open AccessThe enhancement of v4 in nuclear collisions at the highest densities signals a first-order phase transition
The beam energy dependence of \(v_{4}\)v4 (the quadrupole moment of the transverse radial flow) is sensitive to the nuclear equation of state (EoS) in mid-central Au + Au collisions at the energy range of $ 3 < \sq...
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Article
Broadening of the chiral critical region in a hydrodynamically expanding medium
We investigate higher cumulants of the sigma field as the chiral order parameter at the QCD phase transition. We derive a thermodynamic expression for the skewness and kurtosis from susceptibilities and use th...
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Article
Enhancement of elliptic flow can signal a first-order phase transition in high-energy heavy-ion collisions
The beam energy dependence of the elliptic flow, \(v_{2}\) ...
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Chapter
The QCD Phase Diagram and Hadron Formation in Relativistic Nuclear Collisions
We analyze hadrochemical freeze-out in central collisions of heavy nuclei at AGS, SPS and LHC energies. Employing the UrQMD hybrid transport model we study the effects of the final hadron/resonance expansion p...
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Article
Spinodal amplification and baryon number fluctuations in nuclear collisions at NICA
We discuss the effect of spinodal instabilities on the fluctuations of conserved flavors in nuclear collisions at NICA. We find that, when the system undergoes a phase transformation, baryon number clum** du...
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Article
Resonance states in an effective chiral hadronic model
With an effective chiral flavour SU(3) model we show the effect of hadronic resonances on the QCD phase diagram. We state that varying the resonance couplings to the scalar and vector fields affects the order ...
