Jet Quenching and the p-bar >= pi- Anomaly at RHIC

Details Jet Quenching and the p-bar >= pi- Anomaly at RHIC Jet Quenching and the p-bar >= pi- Anomaly at RHIC

2001-04-22

arxiv.org/abs/nucl-th/0104066v2

Phys.Rev.C65:041902,2002

Physics

Nuclear Physics

Nuclear Theory

5 pages, 4 figures, REVTeX, uses bbox.sty. Final version: references and figures updated. Added discussion on the p/pi+ ratio

Scientific paper

10.1103/PhysRevC.65.041902

PHENIX data on Au+Au at root(s)_= 130 AGeV suggest that p-bar yields may exceed pi- at high p_T > 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 p_T ~ 2 GeV/c is limited to a finite p_T window that decreases with increasing impact parameter.

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