Universal physics of the few-body system of two neutrons and one flavored meson

摘要

We investigate the s-wave three-body system of two neutrons and one flavored meson with total spin-isospin J = 0, I = 3/2. The meson-neutron scattering length can become infinitely large when extrapolated to an unphysical region of the quark mass between strangeness and charm in the so-called zero coupling limit. Using a low-energy cluster effective field theory, we demonstrate that the Efimov effect is formally manifest in the three-body system when the meson-neutron scattering length approaches the unitary limit of the two-body interaction. We thereby discuss the consequence of remnant universal physics in the physical K(-)nn and D(0)nn systems.