Correlations in multiparticle production
  We discuss correlations in the hadron production in the $pp$-collision with emphasize on the ridge-like structure origin in the two-particle correlation function. We suggest that this structure can appear due to a rotating nature of the transient state of matter generated in the intermidiate stage of proton collison. 
S.M. Troshin, N.E. Tyurin
hep-ph