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

We study the elliptic flow $v_2$ of multi-strange hadrons such as the $ϕ$, $Ξ$ and $Ω$ 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 $ϕ$ and $Ω$ will allow for the unambiguous distinction between parton recombination and statistical hadro-chemistry to be the dominant process in hadronization at intermediate transverse momenta.