$A_N$ at small negative values of $\xf$ in the reaction $p+p(pol) \to Ï^0+X$ at 70 GeV and universal threshold in inclusive pion production

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; S. B. Nurushev; P. A. Semenov; A. F. Prudkoglyad; K. E. Shestermanov; L. F. Soloviev; A. N. Vasiliev; A. E. Yakutin; N. S. Borisov; A. N. Fedorov; V. N. Matafonov; A. B. Neganov; Yu. A. Plis; Yu. A. Usov; A. A. Lukhanin

doi:10.1142/9789812701909_0111

paper

$A_{N}$ at small negative values of $\xf$ in the reaction $p + p (p o l) \to I ¨ ^{0} + X$ at 70 GeV and universal threshold in inclusive pion production

arXiv:hep-ex/0501062 · doi:10.1142/9789812701909_0111

Abstract

The talk continues the series of Single Spin Asymmetry (SSA) $I ¨ ^{0}$ 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 $-0.4<\xf<-0.25$. The result of the current experiment is in agreement with the universal threshold in pion asymmetries.

4 pages, 3 figures, Presented at SPIN-2004 at Trieste, October 10-16, 2004

AN​ at small negative values of $\xf$ in the reaction p+p(pol)→I¨0+X at 70 GeV and universal threshold in inclusive pion production

Abstract

$A_{N}$ at small negative values of $\xf$ in the reaction $p + p (p o l) \to I ¨ ^{0} + X$ at 70 GeV and universal threshold in inclusive pion production