  A system of nontopological solitons interacting through scalar and vector
meson exchange is used to model nuclear matter. The models studied are of the
Friedberg-Lee type, which exhibit dynamical bag formation due to the coupling
of quarks to a scalar composite gluon field. It is shown that the chiral
chromodielectric model gives the best fit to the empirical data. The presence
of the scalar meson guarantees saturation and an increase of the proton charge
radius with nuclear density consistent with the EMC effect.

Nuclear Theory