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Measurement of Analyzing Power for Proton-Carbon Elastic Scattering in the Coulomb-Nuclear Interference Region with a 22-GeV/c Polarized Proton Beam

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arxiv hep-ex/0206057 v1 pith:5YKQSVBF submitted 2002-06-22 hep-ex nucl-ex

classification hep-exnucl-ex
keywords analyzingpowerbeamcoulomb-nuclearelasticinterferencepolarizedproton
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

The analyzing power for proton-carbon elastic scattering in the coulomb-nuclear interference region of momentum transfer, $9.0\times10^{-3}<-t<4.1\times10^{-2}$ (GeV/$c)^{2}$, was measured with a 21.7 GeV/$c$ polarized proton beam at the Alternating Gradient Synchrotron of Brookhaven National Laboratory. The ratio of hadronic spin-flip to non-flip amplitude, $r_5$, was obtained from the analyzing power to be $\text{Re} r_5=0.088\pm 0.058$ and $\text{Im} r_5=-0.161\pm 0.226$.

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