Systematics of global event properties in p-p and d-Au collisions at Sqrt(s)=200GeV

Details Systematics of global event properties in p-p and d-Au collisions at Sqrt(s)=200GeV Systematics of global event properties in p-p and d-Au collisions at Sqrt(s)=200GeV

2004-03-12

arxiv.org/abs/nucl-ex/0403015v2

Physics

Nuclear Physics

Nuclear Experiment

Paper has been presented as a poster at Quark Matter 2004

Scientific paper

The spectra of identified charged particles were studied as a function of multiplicity at midrapidity in p-p and d-Au collisions and compared to Au-Au collisions at 200 GeV. The spectra of heavier particles in the most central d-Au collisions and in the highest multiplicity p-p collisions are harder than in peripheral Au-Au collisions. The spectra were studied within the blast wave model framework. The extracted kinetic freeze out temperature smoothly decreases, while the average flow velocity parameter increases with increasing charged multiplicity. The particle ratios of kaon/pion and antiproton/pion show moderate change with increasing charged multiplicity. The kaon to pion ratio in the highest multiplicity p-p collisions is below the ratio in central Au-Au.

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