Conveners
3; Wed-II: Topical session
- Hirokazu Tamura (Tohoku University)
The hyperon puzzle in neutron stars is one of the most challenging questions to be solved in nuclear and astrophysics nowadays. To approach this problem, we need to clarify possible repulsion in the $\Lambda N$ interaction in dense nuclear matter, in other words, possible repulsion in the $\Lambda NN$ three-body force. In order to extract information on the $\Lambda NN$ three-body force,...
On the endeavour to explore the strong interaction among hadrons, the ALICE Collaboration has extended the experimental measurements beyond those of two particles, studying three-body interactions. These measurements provide unique information on many aspects of strongly-coupled systems, like exotic bound states and the genuine three-body interactions. The latter constitute an important...
Remarkable progress has been achieved in recent decades towards quantitative understanding of nuclear forces and currents in the framework of chiral effective field theory. While accurate and precise two-nucleon potentials from chiral EFT are already available, the three nucleon forces are less well understood and constitute an important frontier in nuclear physics. I will review the current...
Two-body hyperon-nucleon interaction models often assume additional 3-body $\Lambda NN$ terms to reproduce the empirically derived value of $D = 30$ MeV for the $\Lambda$-nucleus potential depth. There is no consensus yet on the sign and size of such 3-body terms. Applying consistently a density-dependent $\Lambda$-nucleus optical potential to binding energy calculations of observed $1s$ and...
A survey is given on the issue of strangeness contributions to the composition of dense matter in the core of neutron stars. The first part of this presentation reviews empirical constraints on the neutron star equation-of-state. The second part focuses primarily on our present understanding of hyperon-nuclear three-body forces and their role in providing a possible solution to the so-called...
