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Hadron composition at high-pT : p/p ratios
Central colls.: Baryon yield ≈ pion yield for pT>2 GeV/c
more protons
@ 130 GeV than
@ 200 GeV
Very different from jet fragmentation (strong non-perturbative production).
Periph. colls.: baryon/meson ratio ~ 0.3 as in p+p,p (ISR,FNAL)
Notes: