Hyperon-Nucleon Interactions and the Composition of Dense Nuclear Matter

Abstract

Low-energy nΣ − interactions determine, in part, the role of the strange quark in dense matter. Our Lattice QCD calculations, performed at a pion mass of m π ∼ 389 MeV in two large lattice volumes, and at one lattice spacing, are extrapolated to the physical pion mass by diagonalizing the leading order finite-volume Hamiltonian in NN effective field theory. The interactions determined from QCD are consistent with those extracted from hyperon-nucleon experimental data within uncertainties.