Baryon properties in meson mediums from lattice QCD

Abstract

We present results for the ground-state mass shifts of octet baryons due to the presence of a medium of pions or kaons from a lattice QCD calculation performed at a single value of the quark mass, corresponding to a pion mass of m[subscript π] ∼ 390 MeV, and a spatial volume V ∼ (4fm)[superscript 3]. We use a canonical approach in which correlators are formed using a single baryon propagator and a fixed number of meson propagators, up to n = 9. From the ground-state energies we calculate two and three-body interaction parameters. We also extract combinations of low-energy constants by comparing our results to tree level chiral perturbation theory at non-zero isospin/kaon chemical potential.