Single-Spin Asymmetry in Inclusive $π^0$ Production Measured at the Protvino 70 GeV Accelerator

Details Single-Spin Asymmetry in Inclusive $π^0$ Production Measured at the Protvino 70 GeV Accelerator Single-Spin Asymmetry in Inclusive $π^0$ Production Measured at the Protvino 70 GeV Accelerator

2003-12-03

arxiv.org/abs/hep-ex/0312014v1

Czech.J.Phys. 54 (2004) B167-B172

Physics

High Energy Physics

High Energy Physics - Experiment

5 pages, 6 figures; Presented on "Advanced Studies Institute" - Symmetries and SPIN, (SPIN-Praha-2003), Prague, July 12 - July

Scientific paper

Single Spin Asymmetries (SSA) $A_N$ measured in the two reactions at the Protvino 70 GeV accelerator are presented. $A_N$ in the reaction $p+p(pol)->\pi^0+X$ in the central region is close to zero within the error bars. SSA in the reaction $\pi^- +p(pol)->\pi^0+X$ in the polarized target fragmentation region is equal to $(-15 \pm 4)%$ at $|x_F|>0.4$. There is an indication that the asymmetry arises at the same pion energy in the center of mass system.

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