# $A N$ at small negative values of $xf$ in the reaction $p p(pol) o π^0 X$ at 70 GeV and universal threshold in inclusive pion production

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The talk continues the series of Single Spin Asymmetry (SSA) $\pi^0$ inclusive measurements carried out at Protvino 70 GeV accelerator. The asymmetry in the polarized target fragmentation region grows up in absolute value with $\xf$ decreasing and equals to $(-16 \pm 5)%$ at \$-0.4

Author: A. M. Davidenko; A. A. Derevschikov; V. N. Grishin; V. Yu. Khodyrev; Yu. A. Matulenko; Yu. M. Melnick; A. P. Meschanin; V. V. Mochalov; L. V. Nogach;

Source: https://archive.org/