Conveners
1-day workshop (4th week)
- Daiki Suenaga (KMI, Nagoya University)
1-day workshop (4th week)
- MinJung Kweon (Inha University)
1-day workshop (4th week)
- Owe Philipsen (Goethe University Frankfurt, Germany)
1-day workshop (4th week)
- Jishnu Goswami (RIKEN Center for Computational Science)
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Prof. Koutarou Kyutoku (Chiba University)11/7/24, 9:00 AM4th week (Nuclear matter under extreme conditions)
Gravitational waves from binary-neutron-star mergers enable us to observe accurately the orbital evolution and postmerger dynamics. On the one hand, the orbital evolution tells us about intermediate-density matter characterizing premerger neutron stars. On the other hand, postmerger dynamics may reflect how hadrons transition to quarks at high density. In this talk, I will discuss the current...
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Michał Marczenko (University of Wrocław)11/7/24, 10:00 AM4th week (Nuclear matter under extreme conditions)
In this talk, I discuss the statistically determined equation of state of dense matter that fulfills the multimessenger constraints and determine the properties of dense matter found in neutron stars. I demonstrate that the speed of sound and trace anomaly are driven towards their conformal values at the center of maximally massive NSs. I argue that the local peak of the speed of sound is...
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Chihiro Sasaki (University of Wroclaw & SKCM2 at Hiroshima University)11/7/24, 11:00 AM4th week (Nuclear matter under extreme conditions)
Recent advances in multi-messenger astronomy have provided a key set of constraints on the equation of state (EoS) of QCD at high baryon density, via extraterrestrial observations of dense stellar objects such as neutron stars (NSs). It was suggested that the softening of the EoS at intermediate densities required to comply with the observed tidal deformability, together with the subsequent...
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Akihiko Monnai (Osaka Institute of Technology)11/7/24, 12:00 PM4th week (Nuclear matter under extreme conditions)
Elucidation of the QCD phase structure is an important topic in particle and nuclear physics. We construct a four-dimensional equation of state as a function of the temperature and the chemical potentials of net baryon (B), charge (Q), and strangeness (S) for the QCD matter created in nuclear collisions [1]. Lattice QCD simulations and a hadron resonance gas model are considered for the...
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Prof. Sven Bjarke Gudnason (Henan University)11/7/24, 2:00 PM4th week (Nuclear matter under extreme conditions)
In this talk, I will introduce dense baryonic matter in the Sakai-Sugimoto (SS) model, a popular variant of holographic QCD, using a homogeneous Ansatz for isospin symmetric matter and then for nonvanishing isospin chemical potential. I will also show that the isospin contribution to the energy, directly proportional to the symmetry energy, can be computed formally as a moment of inertia of...
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Akihiro Iwanaka (RCNP, Osaka U.)11/7/24, 3:00 PM4th week (Nuclear matter under extreme conditions)
We derived equations of state for neutron stars using a bottom-up holographic QCD model. Our calculations include mass-radius relationships of neutron stars and the sound velocity in high-density QCD matter. We also obtained partial restoration of chiral symmetry in finite baryon density.
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Daiki Suenaga (KMI, Nagoya University)11/7/24, 4:00 PM4th week (Nuclear matter under extreme conditions)
Two-color ($N_c=2$) QCD world is one of the useful testing grounds to delineate cold and dense QCD matter, since the lattice QCD simulation is straightforwardly applicable thanks to the disappearance of the sign problem. Motivated by recent numerical results from the lattice QCD activities, I am being investigating properties of dense two-color QCD by constructing the linear sigma model (LSM)....
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Bikai Gao (Nagoya University)11/7/24, 5:00 PM4th week (Nuclear matter under extreme conditions)
The recent discovery of a central compact object (CCO) within the supernova remnant HESS J1731-347, characterized by a mass of approximately $0.77^{+0.20}_{-0.17} M_{\odot}$ and a radius of about $10.4^{+0.86}_{-0.78}$ km, has opened up a new window for the study of compact objects. This CCO is particularly intriguing because it is the lightest and smallest compact object ever observed,...
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Yuk Kei Kong (Nagoya University)11/7/24, 5:30 PM4th week (Nuclear matter under extreme conditions)
We study the effect of the isovector-scalar meson $a_0$(980) on the properties of nuclear matter and the neutron star (NS) matter by constructing a parity doublet model with including the $a_0$ meson based on the chiral SU(2)$_L\times$SU(2)$_R$ symmetry.
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We also include the $\omega$-$\rho$ mixing contribution to adjust the slope parameter at the saturation.
We find that, when the chiral...