Flavor ordering of elliptic flows at high transverse momentum

Zi-wei Lin; C M Ko

doi:10.1103/PhysRevLett.89.202302

Flavor ordering of elliptic flows at high transverse momentum

Phys Rev Lett. 2002 Nov 11;89(20):202302. doi: 10.1103/PhysRevLett.89.202302. Epub 2002 Oct 29.

Authors

Zi-wei Lin¹, C M Ko

Affiliation

¹ Cyclotron Institute and Physics Department, Texas A&M University, College Station, Texas 77843-3366, USA.

PMID: 12443471
DOI: 10.1103/PhysRevLett.89.202302

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.