Nonextensive statistical effects and strangeness production in hot and dense nuclear matter

Lavagno, Andrea; Pigato, Daniele

doi:10.1088/0954-3899/39/12/125106

Cited by 27 publications

(24 citation statements)

References 79 publications

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“…The baryon effective energy is defined as E * i (k) = k 2 + M i * 2 . Because we are going to describe the nuclear EOS at finite temperature and density with respect to strong interaction, we have to require the conservation of three "charges": baryon number (B), electric charge (C) and strangeness number (S) [7,8]. Each conserved charge has a conjugated chemical potential and the system is described by three independent chemical potentials: μ B , μ C and μ S .…”

Section: The Effective Relativistic Mean Field Modelmentioning

confidence: 99%

Hadron yield ratios in an effective relativistic equation of state

Lavagno

2014

EPJ Web of Conferences

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Abstract. We investigate an effective relativistic equation of state at finite values of temperature and baryon chemical potential with the inclusion of the full octet of baryons, the Delta-isobars and the lightest pseudoscalar and vector meson degrees of freedom. These last particles have been introduced within a phenomenological approach by taking into account of an effective chemical potential and mass depending on the self-consistent interaction between baryons. In this framework, we study of the hadron yield ratios measured in central heavy ion collisions over a broad energy range.

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Section: The Effective Relativistic Mean Field Modelmentioning

confidence: 99%

Hadron yield ratios in an effective relativistic equation of state

Lavagno

2014

EPJ Web of Conferences

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“…[32,33]. Strangeness production has been mentioned under the same statistical set up in [34]. Local deconfinement in relativistic systems including strong coupling diffusion and memory effects have been discussed in [35,36].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics and relativistic kinetic theory for q-generalized Bose–Einstein and Fermi–Dirac systems

Mitra¹

2018

Eur. Phys. J. C

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The thermodynamics and covariant kinetic theory are elaborately investigated in a non-extensive environment considering the non-extensive generalization of BoseEinstein (BE) and Fermi-Dirac (FD) statistics. Starting with Tsallis' entropy formula, the fundamental principles of thermostatistics are established for a grand canonical system having q-generalized BE/FD degrees of freedom. Many particle kinetic theory is set up in terms of the relativistic transport equation with q-generalized Uehling-Uhlenbeck collision term. The conservation laws are realized in terms of appropriate moments of the transport equation. The thermodynamic quantities are obtained in a weak non-extensive environment for a massive pion-nucleon and a massless quark-gluon system with non-zero baryon chemical potential. In order to get an estimate of the impact of non-extensivity on the system dynamics, the q-modified Debye mass and hence the qmodified effective coupling are estimated for a quark-gluon system.

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“…In this paper, we are going to study a EOS at finite temperature and density by means of a relativistic mean-field model with the inclusion ∆(1232)-isobars [4][5][6] and by requiring the Gibbs conditions on the global conservation of baryon number and net electric charge. In regime of finite values of density and temperature, a state of high density resonance matter may be formed and the ∆(1232)-isobar degrees of freedom are expected to play a central role in relativistic heavy ion collisions and in the physics of compact stars [7,8] Alternating Gradient Synchrotron (AGS) to RHIC [9,10].…”

Section: Introductionmentioning

confidence: 99%

Nuclear phase transition and thermodynamic instabilities in dense nuclear matter

Lavagno

2018

EPJ Web Conf.

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Abstract. We study the presence of thermodynamic instabilities in a nuclear medium at finite temperature and density where nuclear phase transitions can take place. Such a phase transition is characterized by pure hadronic matter with both mechanical instability (fluctuations on the baryon density) that by chemical-diffusive instability (fluctuations on the electric charge concentration). Similarly to the liquid-gas phase transition, the nucleonic and the ∆-matter phase have a different isospin density in the mixed phase. In the liquid-gas phase transition, the process of producing a larger neutron excess in the gas phase is referred to as isospin fractionation. A similar effects can occur in the nucleon-∆ matter phase transition due essentially to a ∆ − excess in the ∆-matter phase in asymmetric nuclear matter. In this context we also discuss the relevance of ∆-isobar and hyperon degrees of freedom in the bulk properties of the protoneutron stars at fixed entropy per baryon, in the presence and in the absence of trapped neutrinos.

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Nonextensive statistical effects and strangeness production in hot and dense nuclear matter

Cited by 27 publications

References 79 publications

Hadron yield ratios in an effective relativistic equation of state

Hadron yield ratios in an effective relativistic equation of state

Thermodynamics and relativistic kinetic theory for q-generalized Bose–Einstein and Fermi–Dirac systems

Nuclear phase transition and thermodynamic instabilities in dense nuclear matter

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