Comparative study of the inclusive asymmetries induced by polarized protons and antiprotons at 16 GeV/$c$ at the U-70 accelerator

Abstract

The only comparative study of the inclusive pion single-spin asymmetries produced in the interactions of the polarized protons and antiprotons in collisions with unpolarized proton was carried out at E-704 experiment. Significant asymmetries were found at large $x_F$ and middle $p_T$, ${\pi }^{+}$ and ${\pi }^0$ asymmetries have positive signs while ${\pi }^{-}$ has negative one in the $p^{\uparrow }+p$ collisions, while in the ${\bar{p}}^{\uparrow }+p$ interactions the ${\pi }^{-}$ and ${\pi }^0$ asymmetries have positive signs while ${\pi }^{+}$ has negative sign. Similar experimental study can be done in the SPASCHARM experiment at U-70 accelerator at IHEP for various secondary particles with the use of 16 GeV polarized proton and antiproton beams.

7 pages, 4 figures, XVII Workshop on high energy spin physics DSPIN-17, Dubna, Russia, September 11 - 15, 2017