Elliptic flow of multi-strange particles: fragmentation, recombination and hydrodynamics

Abstract

We study the elliptic flow $v_2$ of multi-strange hadrons such as the $\varphi$, $\Xi$ and $\Omega$ as a function of transverse momentum in the recombination and fragmentation model and compare to a standard hydrodynamic calculation. We find that the measurement of $v_2$ for the $\varphi$ and $\Omega$ will allow for the unambiguous distinction between parton recombination and statistical hadro-chemistry to be the dominant process in hadronization at intermediate transverse momenta.

Comments: 11 pages, 3 figures; v2: final version accepted for publication in Physics Letters B