High-p_T Pion Quenching versus anti+Baryon Enhancement in Nucleus-Nucleus Collisions
arXiv:hep-ph/0208108 · doi:10.1016/S0375-9474(02)01487-2
Abstract
Jet quenching of quarks and gluons in central A+A collisions suppresses the high-p_T meson production and exposes novel baryon dynamics that we attribute to (gluonic) baryon junctions. This mechanism predicts baryon enhancement in a finite moderate-p_T window that decreases with increasing impact parameter. We also extend recent calculations of the transverse momentum behavior of p/pi^+ and p-bar/pi^- to other baryon species and show that a similar pattern is expected for the K^-/Lambda and K^+/bar{Lambda} ratios. Within the framework of the model constant p-bar/p and bar{Lambda}/Lambda ratios are found in central Au+Au collisions at RHIC energies up to p_T ~= 4 - 5 GeV.
To appear in the Proceedings of "Quark Matter 2002". 4 pages, 6 .eps figures. Uses espcrc1.sty
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