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Neural network reconstruction of the dense matter equation of state from neutron star observables
Shriya Soma, Lingxiao Wang, Shuzhe Shi +2
The Equation of State (EoS) of strongly interacting cold and hot ultra-dense QCD matter remains a major challenge in the field of nuclear astrophysics. With the advancements in mea…
An equation-of-state-meter of QCD transition from deep learning
Long-Gang Pang, Kai Zhou, Nan Su +3
Supervised learning with a deep convolutional neural network is used to identify the QCD equation of state (EoS) employed in relativistic hydrodynamic simulations of heavy-ion coll…
Examination of directed flow as a signature of the softest point of the equation of state in QCD matter
Yasushi Nara, Harri Niemi, Akira Ohnishi +1
We analyze the directed flow of protons and pions in high-energy heavy-ion collisions in the incident energy range from to 27 GeV within a mi…
Entropy production in chemically non-equilibrium quark-gluon plasma created in central Pb+Pb collisions at LHC energies
V. Vovchenko, M. I. Gorenstein, L. M. Satarov +4
We study the possibility that partonic matter produced at early stage of ultrarelativistic heavy-ion collisions is out of chemical equilibrium. It is assumed that initially this ma…
Chiral Hadronic Mean Field Model including Quark Degrees of Freedom
P. Rau, J. Steinheimer, S. Schramm +1
In an approach inspired by Polyakov loop extended NJL models, we present a nonlinear hadronic SU(3) sigma-omega mean field model augmented by quark degrees of freedom. By introduci…
Resonance States in an Effective Chiral Hadronic Model
P. Rau, J. Steinheimer, S. Schramm +1
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 vec…
Baryon Resonances in a Chiral Hadronic Model for the QCD Equation of State
Philip Rau, Jan Steinheimer, Stefan Schramm +1
In this paper we study the influence of hadronic resonances on the phase diagram calculated with an effective chiral flavour SU(3) model. We show that varying the couplings of the…
An effective chiral Hadron-Quark Equation of State
J. Steinheimer, S. Schramm, H. Stöcker
We construct an effective model for the QCD equation of state, taking into account chiral symmetry restoration as well as the deconfinement phase transition. The correct asymptotic…
Hydrodynamics with a chiral hadronic equation of state including quark degrees of freedom
J. Steinheimer, V. Dexheimer, H. Petersen +3
We investigate the influence of a deconfinement phase transition on the dynamics of hot and dense nuclear matter. We apply a hybrid model where an intermediate hydrodynamics stage…
Equation of state at FAIR energies and the role of resonances
E. Zabrodin, I. C. Arsene, J. Bleibel +8
Two microscopic models, UrQMD and QGSM, are used to extract the effective equation of state (EOS) of locally equilibrated nuclear matter produced in heavy-ion collisions at energie…
A Micro-Canonical Description of Hadron Production in Proton-Proton Collisions
F. M. Liu, K. Werner, J. Aichelin +2
A micro-canonical treatment is used to study particle production in pp collisions. First this micro-canonical treatment is compared to some canonical ones. Then proton, antiproton…
Constraints on possible phase transitions above the nuclear saturation density
I. N. Mishustin, L. M. Satarov, H. Stoecker +1
We compare different models for hadronic and quark phases of cold baryon-rich matter in an attempt to find a deconfinement phase transition between them. For the hadronic phase we…
From the Dyson-Schwinger to the Transport Equation in the Background Field Gauge of QCD
Q. Wang, K. Redlich, H. Stöcker +1
The non-equilibrium quantum field dynamics is usually described in the closed-time-path formalism. The initial state correlations are introduced into the generating functional by n…
Kinetic equation for gluons at the early stage
Qun Wang, Krzysztof Redlich, Horst Stöcker +1
We derive the kinetic equation for pure gluon QCD plasma in a general way, applying the background field method. We show that the quantum kinetic equation contains a term as in the…
Black Hole Production in Large Extra Dimensions at the Tevatron: Possibility for a First Glimpse on TeV Scale Gravity
Marcus Bleicher, Stefan Hofmann, Sabine Hossenfelder +1
The production of black holes in large extra dimensions is studied for Tevatron energies. We find that black holes may have already been created in small abundance in co…
Partonic Scattering Cross Sections in the QCD Medium
Joerg Ruppert, Gouranga C. Nayak, Dennis D. Dietrich +2
A medium modified gluon propagator is used to evaluate the scattering cross section for the process gg-->gg in the QCD medium by performing an explicit sum over the polarizations o…
J/psi Suppression and Enhancement in Au+Au Collisions at the BNL RHIC
M. I. Gorenstein, A. P. Kostyuk, H. Stoecker +1
We consider the production of the J/psi mesons in heavy ion collisions at RHIC energies in the statistical coalescence model with an exact (canonical ensemble) charm conservation.…
Nuclear Broadening Effects on Hard Prompt Photons at Relativistic Energies
A. Dumitru, L. Frankfurt, L. Gerland +2
We calculate prompt photon production in high-energy nuclear collisions. We focus on the broadening of the intrinsic transverse momenta of the partons in the initial state from nuc…
Open Charm Enhancement in Pb+Pb Collisions at SPS
M. I. Gorenstein, A. P. Kostyuk, H. Stoecker +1
The statistical coalescence model for the production of open and hidden charm is considered within the canonical ensemble formulation. The data for the J/ψmultiplicity in Pb+Pb col…
Strange quark matter within the Nambu-Jona-Lasinio model
I. N. Mishustin, L. M. Satarov, H. Stoecker +1
Equation of state of baryon rich quark matter is studied within the SU(3) Nambu-Jona-Lasinio model with flavour mixing interaction. Possible bound states (strangelets) and chiral p…
Equation of state of resonance-rich matter in the central cell in heavy-ion collisions at =200 AGeV
L. V. Bravina, E. E. Zabrodin, S. A. Bass +7
The equilibration of hot and dense nuclear matter produced in the central cell of central Au+Au collisions at RHIC ( AGeV) energies is studied within a microscopic tr…
Phase Transition in Hot Pion Matter
A. Kostyuk, M. Gorenstein, H. Stoecker +1
The equation of state for the pion gas is analyzed within the third virial approximation. The second virial coefficient is found from the pion-pion- scattering data, while the thir…
Bottom and Charm Production at LHC and RHIC
Jens Ole Schmitt, Gouranga C. Nayak, Horst Stoecker +1
We study and production and the influence of nuclear shadowing at LHC and RHIC energies. We find a significant reduction in the production cross section of bo…
Bremsstrahlung from a Microscopic Model of Relativistic Heavy Ion Collisions
S. M. H. Wong, M. Belkacem, J. I. Kapusta +3
We compute bremsstrahlung arising from the acceleration of individual charged baryons and mesons during the time evolution of high-energy Au+Au collisions at the Relativistic Heavy…