On quark confinement hadrons as ''strong black holes''

It is considered the possibility that quarks can result to be confined into hadrons- e.g. into nucleons- as a consequence of the fact that hadrons might be considered as ''strong black holes'', i.e. as ''black holes'' due not to a gravitational field interacting with gravitational charges (masses), but to the strong field interacting with the ''strong charges'' carried by quarks. The ''strong Schwarzschild radiuus'' results to be approximately equal to 10-13cm, and in nucleons quarks remain confined between the two spheres respectively with inner radius approximately equal to 10-15cm and outer radius approximately equal to 10-13cm. A priori, on the contrary, leptons and photons can come out from hadrons, contrary to quarks