Clue to the unification of gravitation and particle physics

Astrophysical data reveal the existence of a (broken) symmetry of the gravitational interaction implying the existence of a new dimensional constant $p\simeq 8\times {10}^{-16\mathrm{}}$ ${\mathrm{g}}^{-1\mathrm{}}$ ${\mathrm{cm}}^2$ ${\sec }^{-1\mathrm{}}$. The existence of this constant provides a clue to the unification of gravitation and particle physics.