Hadron composition at high-pT (4): h/p ratio

• Central colls.: h/p ~ 2.5 at intermediate pT's (enhanced baryon production)

• Peripheral colls.: h/p ~ 1.6 as in p+p (perturbative ratio)

• Since h± = p± + p(pbar) + K±  proton (antiproton) non perturbative enhancement is limited to pT < 5 GeV/c

Notes: