Elliptic flow coefficients from transverse momentum conservation

@article{Bzdak2018EllipticFC,
  title={Elliptic flow coefficients from transverse momentum conservation},
  author={Adam Bzdak and Guoliang Ma},
  journal={Physical Review C},
  year={2018},
  volume={97},
  pages={014903}
}
We calculate the $k$-particle ($k=2,4,6,8$) azimuthal cumulants resulting from the conservation of transverse momentum. We find that $c_2\{k\}>0$ and depending on the transverse momenta, $c_2\{k\}$ 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. 
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