QCS2026

Session

Session 7

1 May 2026, 15:50

Conveners

Session 7

• Masayasu Harada (Nagoya Ubiversity)

1. Probing Dark Matter from Cold Neutron Stars to Proto-Neutron Stars Using Two-Fluid Modeling, Bayesian Evidence, and Machine-Learning Inference

Prashant Thakur (Yonsei University)

01/05/2026, 15:50

Abstract: Neutron stars provide a high-density laboratory to test dark matter (DM) through its gravitational imprint on stellar structure and early evolution. In this talk, I present a unified set of results based on two-fluid modeling of cold neutron stars and evolving proto-neutron stars (PNSs), together with Bayesian model selection, multi-messenger constraints, and inverse parameter...

23. Sensitivity of neutron drip lines and neutron star properties to the symmetry energy

Yeunhwan Lim (Yonsei University)

01/05/2026, 16:25

We study how the nuclear symmetry energy and its density slope parameter affect the neutron dripline of finite nuclei and the macroscopic properties of neutron stars within a semiclassical liquid drop model (LDM). Our analysis employs energy density functionals constrained by chiral effective field theory. The symmetry energy at saturation density is fixed, while the surface tension parameter...

53. Study of pion condensate in nuclear matter based on a parity doublet model

LIU Xiang

01/05/2026, 17:00

This work focuses on the existence of pion condensate in neutron star matter based on a parity doublet model. Parity doublet model is a model that explains the hadron mass as two parts: one part is generated by spontaneous breaking of chiral symmetry and the other is an invariant mass that does not depend on the breaking of chiral symmetry and is called a chiral invariant mass $m_0$. A pion...

3. Exotic Hadronic Matter in Neutron Stars: Bayesian Inference of Antikaons and Δ-Resonances

Vivek Baruah Thapa (Birangana Sati Sadhani Rajyik Vishwavidyalaya)

01/05/2026, 17:20

We present a unified Bayesian analysis of the dense-matter equation of state (EOS) of neutron stars by incorporating exotic hadronic degrees of freedom, namely antikaon condensation and Δ-resonances, within a density-dependent relativistic hadron framework. The model is constrained using nuclear saturation properties, chiral effective field theory ($\chi$EFT) calculations for symmetric and...

15. Compact dwarfs and multibaryon states within the equivparticle model

Hao-Song You (Tsung-Dao Lee Institute, Shanghai Jiao Tong University)

01/05/2026, 17:40

Using an equivparticle model with mean-field approximation (MFA), we systematically investigate quark matter properties across scales, from microscopic multibaryon states to macroscopic compact dwarfs. First, we determine the mass spectra of color-singlet $N$-quark configurations ($N=3$ to $18$) based on SU(6) symmetry and Bayesian inference. Our results predict several bound states, including...