  From theoretical point of view and not being in contradiction with current
observational data, the cosmic strings should have fundamentally different
origin and are characterized by wide range of energies. The paper is devoted to
search for possible cosmological observational tests on superstring theory,
among them to identification of observational characteristics to distinguish
between cosmological superstring of different types. In the brane-world
scenario with an assumption of creation of cosmological superstrings it was
obtained the lower limit on the superstring tension as function of deficit
angle.
