title: Flavor ordering of elliptic flows at high transverse momentum.
abstract: Based on the quark coalescence model for the parton-to-hadron phase transition in relativistic heavy ion collisions, we relate the elliptic flow (upsilon(2)) of high p(T) hadrons to that of high p(T) quarks. For high p(T) hadrons produced from an isospin-symmetric and quark-antiquark-symmetric partonic matter, magnitudes of their elliptic flows follow a flavor ordering as (upsilon(2,pi)=upsilon(2,N))>(upsilon(2,Lambda)=upsilon(2,Sigma))>upsilon(2,K)>upsilon(2,Xi)>(upsilon(2,phi)=upsilon(2,Omega)) if strange quarks have a smaller elliptic flow than light quarks. The elliptic flows of high p(T) hadrons further follow a simple quark counting rule if strange quarks and light quarks have the same high p(T) spectrum and coalescence probability.
authors.affiliation: Cyclotron Institute and Physics Department, Texas A&M University, College Station, Texas 77843-3366, USA.
authors.forename: Zi-wei
authors.initials: ZW
authors.lastname: Lin
authors.forename: C M
authors.initials: CM
authors.lastname: Ko