Anisotropic flow in pp-collisions at the LHC
  We discuss collective effects in $pp$--collisions at the LHC energies and derive an upper bound for the anisotropic flow coefficients $v_n$. A possibility of its verification via comparison with the measurements of $v_2$ is considered. We use an assumption on the relation of the two--particle correlations with the rotation of the transient state of matter. 
S. M. Troshin, N. E. Tyurin
hep-ph nucl-th