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In the framework of our model of soft interactions at high energy based onCGC/saturation approach,we show that Bose-Einstein correlations of identicalgluons lead to large values of $v_n$. We demonstrate how three dimensionalscales of high energy interactions: hadron radius, typical size of the wavefunction in diffractive production of small masses (size of the constituentquark), and the saturation momentum, influence the values of BE correlations,and in particular, the values of $v_n$. Our calculation shows that thestructure of the `dressed' Pomeron leads to values of $v_n$ which are close toexperimental values for proton-proton scattering, 20\% smaller than theobserved values for proton-lead collisions, and close to lead-lead collisionsfor 0-10\% centrality. Bearing this result in mind, we conclude that it ispremature to consider, that the appearance of long range rapidity azimuthalcorrelations are due only to the hydrodynamical behaviour of the quark-gluonplasma.

european physical journal. c, particles and fields

CGC/saturation approach for high energy soft interactions: `soft'  Pomeron structure and $v_{n}$ in hadron and nucleus collisions from  Bose-Einstein correlation