14th International Conference on Hypernuclear and Strange Particle Physics - HYP2022

Session

3; Wed-II

29 Jun 2022, 11:00

Prague, Czech Republic

Conveners

3; Wed-II: Topical session

• Hirokazu Tamura (Tohoku University)

147. Introduction to the topical session on “Three-body ΛNN force”

Prof. Hirokazu Tamura (Tohoku University)

29/06/2022, 11:00

talk

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,...

37. Investigation of the three-body interactions of hadrons in pp collisions with ALICE

Laura Šerkšnytė (Technische Universitaet Muenchen (DE))

29/06/2022, 11:15

talk

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...

135. Precise three-nucleon interactions from chiral effective field theory: Where do we stand?

Evgeny Epelbaum (Ruhr University Bochum)

29/06/2022, 11:30

talk

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...

102. Constraints from Λ hypernuclei on the ΛNN content of the Λ-nucleus potential

Avraham Gal (Racah Institute of Physics, The Hebrew University)

29/06/2022, 12:00

talk

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...

123. Hyperon-nuclear three-body forces and strangeness in neutron stars

Prof. Wolfram Weise (Technical University of Munich)

29/06/2022, 12:30

talk

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...