  Proton-proton collisions are considered to find favourable conditions for
searching for the transition of a baryon pair state to a hexa-quark confinement
state $(3q)+(3q)\rightarrow(6q)_\mathrm{cnf}$. It is admitted that central $pp$
collisions in a definite range of the initial energy can lead to creation of an
intermediate compound system where the hexa-quark dibaryon can be formed.
Criteria for selection of central collision events and for manifestation of the
quark-structure dibaryon production are proposed.
