QCS2026

Session

Session 3

30 Apr 2026, 09:00

Conveners

Session 3

• Ken'ichiro Nakazato (Kyushu University)

Session 3

• Ken'ichiro Nakazato (Kyushu University)

32. Dense matter and neutrinos in core-collapse supernovae and hot neutron stars

Kohsuke Sumiyoshi (National Institute of Technology, Numazu College)

30/04/2026, 09:00

I will provide an overview of the role of hot, dense matter in core-collapse supernovae and neutron stars, with a particular focus on the crucial roles of neutrinos. Supernovae, which result from the gravitational collapse of massive stars, produce bright optical displays, compact objects (such as neutron stars or black holes), and intense bursts of neutrinos. The explosion mechanism remains...

34. Modeling of binary neutron star mergers for multi-messenger inference of neutron star properties

Sho Fujibayashi (Tohoku University)

30/04/2026, 09:35

The gravitational waves emitted by a binary of two neutron stars tell us not only information about the mass of neutron stars, but also information about the matter properties of deep inside neutron stars. The electromagnetic waves emitted by matter expelled by several mechanisms after the merger reveal the binary's post-merger activity. By combining those two 'messengers', we can better...

61. Binary Neutron Star Merger as a Probe of Hadron-Quark Transition

Yongjia Huang (Purple Mountain Observatory / RIKEN)

30/04/2026, 10:10

The convergence of multi-messenger observations—NICER, GW170817, and theoretical calculations—has tightly constrained the neutron star equation of state, pointing to a non-monotonic sound speed that suggests possible quark matter in massive neutron star cores. However, the masquerade effect obscures the nature of this transition in static stars.

I will show how binary neutron star mergers...

24. Impact of Density-Dependent Axial Coupling Quenching and Nucleon Effective Mass on Neutrino Transport in Core-Collapse Supernovae

Myung-Ki Cheoun (Soongsil University)

30/04/2026, 11:00

We investigate how density-dependent axial-vector coupling quenching and nucleon effective mass modify neutrino transport in core-collapse supernovae (CCSNe). We implement these in-medium effects in neutrino absorption, emission, and scattering opacities used by NULIB and perform simulations of the Woosley–Weaver 15M⊙ progenitor (s15s7b2) with the GR1D code. The effective-mass correction...

42. Density functional theory for the supernova simulation

Chang Ho Hyun (Daegu University)

30/04/2026, 11:35

In this talk, we present recent developments of a new nuclear-matter equation of state (EoS) at finite density and temperature based on realistic nuclear interactions and density functional theory. It is argued that the nucleon effective mass plays an important role in determining the thermal stiffness of the EoS. The uncertainty associated with the in-medium effective mass is systematically...