Speaker
Dr
Hidekatsu Nemura
(Center for Computational Sciences, University of Tsukuba)
Description
Nuclear force is one of the fundamental problems in physics even though
it has been recognized that quantum chromodynamics (QCD) is the theory
of the strong interaction. Although nucleons are not true fundamental
building blocks of atomic nuclei but compositions of quarks and gluons,
the description of nuclei in terms of nucleonic degrees of freedom
provides successful results. The hyperon-nucleon (YN) and hyperon-
hyperon (YY) interactions are fundamental inputs to study the properties
of hypernuclei and the hyperonic matter inside the neutron stars. However,
in contrast to the normal nuclear force where the modern nucleon-nucleon
(NN) potentials together with three-nucleon forces have been used for
precise calculations of light nuclei, scattering experiments for YN and
YY are either difficult or impossible due to the short life-time of
hyperons. Phenomenological YN and YY potentials are not well constrained
from experimental data. Under these circumstances, the lattice QCD would
be a valuable theoretical tool to make a first-principle calculation of
nuclear forces. In this contribution, we would like to present the
lattice QCD calculation to study the baryon-baryon interaction of the
strangeness S=-1 system.
We would also like to present a stochastic variational calculation for
four-nucleon bound state problem by using a lattice nucleon-nucleon
interaction comprising the central and the tensor potentials.
Primary author
Dr
Hidekatsu Nemura
(Center for Computational Sciences, University of Tsukuba)
