Experiment indicates new type of mesic nuclei that could reveal how matter acquires mass

Nearly every object we interact with in our lives has a mass, but where does this mass come from? Modern physics says matter acquires its mass from interaction with a physical vacuum-it is not an empty space, but contains a complex structure. Investigating the system of a meson-a composite particle made of a quark, an elementary particle, and its anti-matter, anti-quark-bound to an atomic nucleus, a mesic nucleus, provides precious insight into the vacuum structure, or mass generation mechanism....