Influence of quark–gluon string interactions on particle correlations in p+p collisions

We study the initial states of p{+}p interactions and their influence on the correlation and fluctuation observables that are sensitive to them by considering the processes of multipomeron exchange and stretching of color QCD strings. We discuss the full string dynamics, their longitudinal motion due to the deceleration of the string ends, and the transverse motion caused by attraction due to the exchange of sigma mesons with subsequent fusion. We calculate the coefficient of rapidity correlations and the strongly intensive variables constructed for the multiplicity of charged particles, $N$, and the total transverse momentum $P_\mathrm{T}$ for inelastic p{+}p interactions at the energy of $200$ GeV.