  The interplay between Hubbard interaction, long-range hopping and disorder on
persistent current in a mesoscopic one-dimensional conducting ring threaded by
a magnetic flux $\phi$ is analyzed in detail. Two different methods, exact
numerical diagonalization and Hartree-Fock mean field theory, are used to
obtain numerical results from the many-body Hamiltonian. The current in a
disordered ring gets enhanced as a result of electronic correlation and it
becomes more significant when contributions from higher order hoppings, even if
they are too small compared to nearest-neighbor hopping, are taken into
account. Certainly this can be an interesting observation in the era of
long-standing controversy between theoretical and experimental results of
persistent current amplitudes. Along with these we also find half-flux quantum
periodic current for some typical electron fillings and kink-like structures at
different magnetic fluxes apart from $\phi=0$ and $\pm \phi_0/2$. The scaling
behavior of current is also discussed for the sake of completeness of our
present analysis.
