Abstract
Experimental data onϱ0 meson polarization inπ−p reaction at 5 GeV/c are presented. Change inϱ0 meson polarization for ϱ mesons produced at smallP ⊥ 2 and atP ⊥ 2 ≧ 0·3 or produced in backward direction in CMS is demonstrated. Natural explanation of these phenomena is one pion exchange mechanism and mechanism of quark-antiquark annihilation as observed forϱ0 meson production in¯pp reactions.
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