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P P data are taken from Adams et al, Fermilab-Pub-91/13-E.
Ratio of the spin averaged invariant cross section for PI0 production in p p and pbar p interactions.
We have measured the production of direct photons, π 0 's, and η's in p p and pp collisions at √ s =53 GeV in the range 2≈ p T ≈6 GeV/ c for the central rapidity region | y | 0.4. No statistically significant difference between pp̄ and pp interactions is observed.
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