  Quantitative information on the tensor force induced isospin-dependence of
short-range nucleon-nucleon correlation (SRC) extracted from recent J-Lab
experiments was used in constraining the high-momentum tails of single nucleon
momentum distributions in both symmetric nuclear matter (SNM) and pure neutron
matter (PNM). Its effects on the Equations of State of SNM and PNM as well as
the nuclear symmetry energy are investigated. It is found that the tensor force
induced isospin-dependence of SRC softens significantly the nuclear symmetry
energy especially at supra-saturation densities.
