  The study of long-range correlations between observables in two rapidity
windows was proposed as a signature of the string fusion and percolation
phenomenon. In the present work we calculate the correlation functions and
coefficients for p-Pb collisions in the framework of the Monte Carlo
string-parton model, based on the picture of elementary collisions of color
dipoles. It describes pA and AA scattering without referring to the Glauber
picture of independent nucleons collisions and includes effects of string
fusion. Different types of correlations are considered: n-n, pt-n, pt-pt, where
n is the event multiplicity of charged particles in a given rapidity window and
pt is their mean transverse momentum. The results, obtained in the present work
for p-Pb collisions, are compared with available experimental results for pt-n
correlations in one window and further predictions are made.
