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[Somogyi Gábor <somogyi.gabor AT wigner.hu>]

Wigner FK RMI Elméleti Osztály Szemináriuma
Tisztelettel meghívjuk


           Alexander Ayriayan
           (University of Wrocław)


"Bayesian Inference of Hybrid Neutron Star Equations of State with a 
Color-Superconducting Quark Core”


címmel tartandó szemináriumára.


Kivonat:



We investigate observational constraints on the equation of state (EOS) of 
dense matter within a Bayesian framework, employing recent measurements of 
neutron star masses, radii, and tidal deformabilities. The study is devoted 
to hybrid EOS models that allow for the emergence of a color-superconducting 
quark phase in the interior of neutron stars. The quark matter sector is 
modeled using a recently developed nonlocal chiral approach, while the 
hadronic phase is described by a relativistic density functional of the DD2 
family. The transition between nuclear and quark matter is implemented via a 
Maxwell construction. By exploring the two-parameter space spanned by the 
vector meson interaction strength and the scalar diquark coupling, we 
determine the region favored by observational data, defined as parameter sets 
reaching at least 90% of the maximum posterior probability. We further 
analyze how this preferred region overlaps with domains that realize 
additional physically motivated conditions, such as the presence of large 
quark cores in neutron stars, an early onset of quark deconfinement, and the 
existence of a third family of compact stars.



Helye: Wigner FK RMI III. ép. Tanácsterem
Ideje: 2026 január 23. péntek d.u. 2 óra

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                      Somogyi Gábor