Jet Quenching and the p-bar >= pi- Anomaly at RHIC
Ivan Vitev, Miklos Gyulassy
Abstract
PHENIX data on Au+Au at root(s)= 130 AGeV suggest that p-bar yields may exceed pi- at high pT > 2 GeV/c. We propose that jet quenching in central collisions suppresses the hard PQCD component of the spectra in central A+A reactions, thereby exposing a novel component of baryon dynamics that we attribute to (gluonic) baryon junctions. We predict that the observed p-bar >= pi- and the p > pi+ anomaly at pT ~ 2 GeV/c is limited to a finite pT window that decreases with increasing impact parameter.
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