High pT azimuthal correlations: Elliptic flow (II)

• Particle species

• hierarchy of flow values:

• v2meson > v2baryon at low pT

• v2meson ≈ v2baryon at pT≈2. GeV/c

• v2meson < v2baryon at higher pT

• Simple v2 scaling behaviour

• predicted by quark

• recombination models:

• v2 and pT normalized by #

• of constituent quarks:

• n = 2 mesons

• n = 3 baryons

Notes: