Jet Quenching and the p-bar >= pi- Anomaly at RHIC
Nuclear Theory
2009-10-09 v2 High Energy Physics - Phenomenology
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.
Cite
@article{arxiv.nucl-th/0104066,
title = {Jet Quenching and the p-bar >= pi- Anomaly at RHIC},
author = {Ivan Vitev and Miklos Gyulassy},
journal= {arXiv preprint arXiv:nucl-th/0104066},
year = {2009}
}
Comments
5 pages, 4 figures, REVTeX, uses bbox.sty. Final version: references and figures updated. Added discussion on the p/pi+ ratio