Conveners
Nuclear Astrophysics, Dense Matter and Compact Stars
- A. Martinou
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Theodoros Gaitanos (Aristotle University of Thessaloniki)05/06/2026, 15:30Talk
Hyperons are baryons with strangeness degrees of freedom. They play a significant role in modern nuclear physics and astrophysics due to their experimental accessibility and significant impact on the high-density equation of state. In-medium hyperons can be produced inside highly compressed matter in reactions or in neutron star cores only due to high energy production thresholds. However, the...
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Sofia Karampagia (Grand Valley State University)05/06/2026, 15:45Talk
Nuclear level densities (NLDs) and $\gamma$-ray strength functions ($\gamma$SFs) are key ingredients in the statistical description of compound nuclear reactions. Despite decades of development, significant uncertainties remain in their modeling. In this work, we study the impact of NLDs and $\gamma$SFs on $(n,\gamma)$ cross sections and Maxwellian-averaged reaction rates for nuclei in the...
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Dr Polychronis Koliogiannis (University of Zagreb)05/06/2026, 16:00Talk
Information on neutron-star matter can be encoded in low-energy nuclear observables, particularly those sensitive to the isovector sector of the nuclear interaction. In this contribution, we investigate how the electric dipole polarizability of neutron-rich nuclei can be used to constrain macroscopic properties of canonical neutron stars within a universal-relation framework. The analysis is...
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Alkiviadis Kanakis-Pegios (Aristotle University of Thessaloniki)05/06/2026, 16:15Talk
In this study we examine the effects of the bulk viscosity of dense matter containing neutrons, protons, and electrons in the environment of neutron stars. Our approach considers the bulk viscosity to be driven by the direct Urca mechanism which tries to restore the chemical equilibrium in a neutron star core for small perturbations of the baryon density. The bulk-viscous dissipation leads to...
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Pavlos Laskos-Patkos (Aristotle University of Thessaloniki)05/06/2026, 16:30Talk
One of the most interesting subjects related to the physics of dense matter is the accurate finite temperature description of the nuclear equation of state. In the present conference contribution, we discuss the properties of hot equations of state which involve a first order phase transition from hadronic to deconfined strange quark matter. For the description of the hadronic phase we utilize...
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Dr Michail Vikiaris (Aristotle University of Thessaloniki)05/06/2026, 16:45Talk
One of the unsolved mysteries in the particle physics is the "neutron decay puzzle". Discrepancies between the neutron lifetime measured in beam and bottle experiments suggest that exotic decay channels and/or the involvement of dark matter may be in play. Recent measurements of the compact star XTE J1814-338, with a mass of $M=1.2_{-0.05}^{+0.05}\ M_{\odot}$ and a radius of...
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Mr Giorgos Tsalis (Aristotle University of Thessaloniki)05/06/2026, 17:00Talk
This work aims to investigate the bulk properties of hybrid stars. The transition from hadronic matter to deconfined quark matter is modeled by a switching function introduced by Albright, Kapusta and Welle. This function has an exponential form, given by: $S(\mu)\,=\,exp[-(\mu_0/\mu)^r]$ and combines the two states of the matter smoothly, in contrast with Maxwell and Gibbs transition.
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