Y.Miake, KPS meeting at Seju, 2004
15
From hydro to jet region
lLow pt region;
l v2(p) > v2(K) > v2(p)
lGood agreement with hydrodynamics
lVery early thermalization (0.6 fm/c) required !
lDeviations from the hydro at higher pt ;
(> 2 GeV/c) jet region
l v2(p,K) < v2(p)
lOrder Reversed !
lWhat is the mechanism to create v2 in the jet region?
lèEnergy loss of parton !
PHENIX : P.R.L. 91, 182301 (2003)
M. Gyulassy, I. Vitev and X.N. Wang, PRL 86 (2001) 2537