Search for azimuthal asymmetry of π0‐meson production in beam fragmentation region on polarized protons and deuterons

The inclusive production of π0’s in the interaction of unpolarized π−, k−, and antiproton beams with polarized proton and deuteron targets has been studied at IHEP. The absolute value of the asymmetry for π0 production in the polarized proton and deuteron targets is between zero and fiften percent for large x=P*/P* max and small Pt and independent on the quark flavor. Results are presented and compared with theoretical calculations. (AIP)