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

Abstract

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.

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

References in corpus (15)

• Suppression of Hadrons with Large Transverse Momentum in Central Au+Au Collisions at $sqrt {s sub {sub {NN}}}_ = 130 GeV
• High $p_T$ Azimuthal Asymmetry in Non-central A+A at RHIC
• Centrality dependence of multiplicity, transverse energy, and elliptic flow from hydrodynamics
• Identified Particle Elliptic Flow in Au+Au Collisions at $\sqrt{s_{{}_{NN}}}=130$ GeV}
• Centrality Dependence of Charged Particle Multiplicity in Au-Au Collisions at sqrt(s_NN)=130 GeV
• Multiplicity distribution and spectra of negatively charged hadrons in Au+Au collisions at sqrt(s_nn) = 130 GeV
• High-p_T pion and kaon production in relativistic nuclear collisions
• Hadron freeze-out conditions in high energy nuclear collisions
• Transverse Expansion and High $p_T$ Azimuthal Asymmetry at RHIC
• Measurement of inclusive antiprotons from Au+Au collisions at 130 GeV
• Elliptic flow in Au+Au collisions at $\sqrt{s_{{}_{NN}}}$ = 130 GeV
• Overview of PHENIX Results from the First RHIC Run
• Neutral Pion Distributions in PHENIX at RHIC
• Pt Distributions of Identified Charged Hadrons Measured with the PHENIX Experiment at RHIC
• First Hints of Jet Quenching at RHIC

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