Physics and Astronomy
Journal or Book Title
Physical Review C
The PHENIX experiment at the Relativistic Heavy Ion Collider has measured charged hadron yields at midrapidity over a wide range of transverse momenta (0.5 < p(T) < 10 GeV/c) in Au+Au collisions at roots(NN)=200 GeV. The data are compared to pi(0) measurements from the same experiment. For both charged hadrons and neutral pions, the yields per nucleon-nucleon collision are significantly suppressed in central compared to peripheral and nucleon-nucleon collisions. The suppression sets in gradually and increases with increasing centrality of the collisions. Above 4-5 GeV/c in p(T), a constant and almost identical suppression of charged hadrons and pi(0)'s is observed. The p(T) spectra are compared to published spectra from Au+Au at roots(NN)=130 in terms of x(T) scaling. Central and peripheral pi(0) as well as peripheral charged spectra exhibit the same x(T) scaling as observed in p+p data.
American Physical Society
Adler, S. S.; Belikov, Sergey; Bhagavatula, S.; Constantin, Paul; Grau, Nathan C.; Hill, John C.; Lajoie, John G.; Lebedev, Alexandre; Ogilvie, Craig; Rak, Jan; Rosati, Marzia; Wohn, F. K.; et al.; and PHENIX Collaboration, "High-p(T) charged hadron suppression in Au+Au collisions at root(SNN)=200 GeV" (2004). Physics and Astronomy Publications. 380.