Strange Nuclear Physics from QCD on Lattice

Abstract

We study single-particle potential of Lambda, Sigma, and Xi hyperons in nucleonic matter starting from the fundamental theory of the strong interaction, QCD. First we carry out a lattice QCD numerical simulation, and extract baryon-baryon interactions from QCD by means of the HAL QCD method. We employ a full QCD gauge configuration ensemble at almost physical point so that we can study the physical world, hence mass of hadrons are nearly physical, for example, pion mass is 146 MeV, kaon mass is 525 MeV, and nucleon mass is 958 MeV. Then, we apply the obtained hyperon interactions to the Brueckner-Hartree-Fock many-nucleon theory, and calculate single-particle potential of hyperons in nucleonic matter U_{Y}(k). We obtain for hyperons stopping in the symmetric nuclear matter at the normal nuclear matter density, U_{Lambda}(0)=-28 MeV, U_{Sigma}(0)=+15 MeV, and U_{Xi}(0)=-4 MeV with a statistical error about +/- 2 MeV associated with our Monte Carlo simulation. These results are qualitatively compatible with values suggested from hypernuclear experiments. This success is remarkable and very encouraging since this proves that our approach to strange nuclear physics starting from QCD is essentially correct.

10 pages, 4 figures, 4 tables, A plenary talk given at the 13th International Conference on Hypernuclear and Strange Particle Physics, June 24-29, 2018, Portsmouth, VA. arXiv admin note: text overlap with arXiv:1612.08399

References in corpus (9)

• Shapiro delay measurement of a two solar mass neutron star
• Nuclear Force from Lattice QCD
• Hyperon mixing and universal many-body repulsion in neutron stars
• Hyperon-nucleon force from lattice QCD
• Baryon-Baryon Interactions in the Flavor SU(3) Limit from Full QCD Simulations on the Lattice
• Construction of energy-independent potentials above inelastic thresholds in quantum field theories
• Baryon interactions from lattice QCD with physical masses --- strangeness $S=-1$ sector ---
• Baryon interactions from lattice QCD with physical quark masses -- Nuclear forces and $\Xi \Xi$ forces --
• Localized $N,\Lambda ,\Sigma$, and $\Xi$ Single-Particle Potentials in Finite Nuclei Calculated with $S{U}_6$ Quark-Model Baryon-Baryon Interactions

Cited by in corpus (4)

• Lattice QCD and baryon-baryon interactions: HAL QCD method
• Hyperon-nucleon interaction in chiral effective field theory at next-to-next-to-leading order
• Heavy Magnetic Neutron Stars
• The impact of quark many-body effects on exotic hadrons