  It is demonstrated within the dibaryon-induced model for $NN$ interaction
that $pp$ scattering in $P$ waves is governed mainly by the production of the
intermediate dibaryon resonances. Two dibaryon resonances with a mass of about
2200 MeV discovered recently by the ANKE-COSY Collaboration are shown to
determine both elastic $pp$ phase shifts and inelasticities in the $^3P_0$ and
$^3P_2$-$^3F_2$ channels from zero energy up to $T_p=0.7$-$0.9$ GeV. It is also
demonstrated clearly that the $^3P_0$ dibaryon plays a decisive role in
near-threshold neutral pion production in $pp$ collisions which is poorly
understood to date. The missing dibaryon contribution is found to be the very
possible reason for the failure of traditional approaches to explain
near-threshold $\pi^0$ production.
