Y.Miake, KPS meeting at Seju, 2004
6
Transverse momentum distr.
l p0 measured in Au+Au
lSecond component at high pt region.
lExponential + Power law
lImportance of hard process at high pt region
lèComparison with pp
Peripheral
Central
Such behaviour is observed in elementary collision which gives the clue to the hard process
Next step is to compare them with pp data