High-pT pion quenching versus anti+baryon enhancement in nucleus-nucleus collisions Original Research Article

Jet quenching of quarks and gluons in central A + A collisions suppresses the high-pT meson production and exposes novel baryon dynamics that we attribute to (gluonic) baryon junctions. This mechanism predicts baryon enhancement in a finite moderate-pT window that decreases with increasing impact parameter. We also extend recent calculations of the transverse momentum behavior of p/π+ and View the MathML source to other baryon species and show that a similar pattern is expected for the K−/Λ and View the MathML source ratios. Within the framework of the model constant View the MathML source and View the MathML source ratios are found in central Au + Au collisions at RHIC energies up to pT ≅ 4 – 5 GeV.