Elliptic flow coefficients from transverse momentum conservation

Abstract

We calculate the k-particle (k=2,4,6,8) azimuthal cumulants resulting from the conservation of transverse momentum. We find that c2{k}>0 and, depending on the transverse momenta, c2{k} can reach substantial values even for a relatively large number of particles. The impact of our results on the understanding of the onset of collectivity in small systems is emphasized.