The total moment and reaction plane in the processes of particle production at high energies

The reaction plane is one of the effective tools to study properties of nuclei-nuclei and other interactions. The present-day methods to find this plane are indirect, and the use of model (hydrodynamic) conceptions about connection between the collective flows and the impact parameter of a collision has limited precision. This work offers a more reliable and direct method to reconstruct the reaction plane (RP) in any model absence. The idea of the method is based on using the conservation law of the total moment M of the colliding particles to obtain the connection of this moment with new experimental observable values. Definition of the RP notion is given on this ground. It has been shown that the normal to the RP of any reaction is oriented indeed along direction of this total moment. In this final analysis, this reason reduces to the existence of an azimuthal correlation among particles produced in the reaction. In the literature that effect is interpreted as manifestation of collective flow production in nuclei collisions