Density dependence of the MIT bag parameters in the field theory of hadrons

MIGUEL AGUIRRE, RICARDO; M SCHVELLINGER,

PHYSICS LETTERS B

ELSEVIER SCIENCE BV

Año: 1997 vol. 400 p. 245 - 249

0370-2693

The equation of state of symmetric nuclear matter with the inclusion of non-strange dibaryons is studied. We pay special attention to the existence of a dibaryon condensate at zero temperature. These calculations have been performed in an extended quark-meson coupling model with density-dependent parameters, which takes into account the finite size of nucleons and dibaryons. A first-order phase-transition to pure dibaryon matter has been found. The corresponding critical density is strongly dependent on the value of the dibaryon mass. The density behavior of the nucleon and dibaryon effective masses and confining volumes have been discussed.