The correlation multiplicity in forward-backward pseudorapidity is really important for the overall event characterization and to extract information on non-pertubative hadronic processes. In this work we present a study of the correlation conditions at LHC. Subsequently, the study is extended using p + p simulations of events to different energies, the correlations in multiplicity are studied with different initial conditions of the events in order to show how it is related to the mechanisms of hadronization, as well as concerning multiple partonic interactions, and consequently the degree of hardness of the collision. The sensitivity to the QCD color reconnection strength is reported.