  Previous studies have claimed that there exist correlations among certain
nuclear saturation parameters and neutron star observables, such as the slope
of the symmetry energy and the radius of a $1.4M_{\odot}$ neutron star.
However, it is not clear whether such correlations are physical or spurious, as
they are not observed universally for all equation of state models. In this
work, we probe the role of vector self-interaction within the framework of the
Relativistic Mean Field model and its role in governing the observable stellar
properties and their correlations with nuclear parameters. We confirm that the
effect of this term is not only to control the high density properties of the
equation of state but also to govern such correlations. We also impose a limit
on the maximum strength of the vector self-interaction using recent
astrophysical data.
