We present a study of the transverse momentum and transverse mass of J/11,mesons pro- duced in nucleus-nucleus and p-nucleus reactions. They include the most recent data col- lected by the NA50 experiment in Pb-Pb and p-A reactions at 158 GeV/c and 400 GeV/c incident momentum respectively. Together with S-U results previously published by ex- periment NA38, the mean squared transverse momentum of J/Psi mesons exhibit a scaling behaiiour which could result from initial state parton interaction. However, for the most central Pb-Pb collisions a saturation effect is observed as a function of centrality.
Transverse momentum and transverse mass distributions of mesons produced in p-A and Pb-Pb interactions at the CERN SPS
ARNALDI, Roberta;BEOLE', Stefania;CHIAVASSA, Emilio Luciano;DELLACASA, Giuseppe;GALLIO, Mauro;MASERA, Massimo;RAMELLO, Luciano;SITTA, Mario;VERCELLIN, Ermanno;
2003-01-01
Abstract
We present a study of the transverse momentum and transverse mass of J/11,mesons pro- duced in nucleus-nucleus and p-nucleus reactions. They include the most recent data col- lected by the NA50 experiment in Pb-Pb and p-A reactions at 158 GeV/c and 400 GeV/c incident momentum respectively. Together with S-U results previously published by ex- periment NA38, the mean squared transverse momentum of J/Psi mesons exhibit a scaling behaiiour which could result from initial state parton interaction. However, for the most central Pb-Pb collisions a saturation effect is observed as a function of centrality.
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