Measurement of the Analyzing Power $A_N$ in $pp$ Elastic Scattering in the CNI Region with a Polarized Atomic Hydrogen Gas Jet Target

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dc.creatorOkada, H.
dc.creatorAlekseev, I. G.
dc.creatorBravar, A.
dc.creatorBunce, G.
dc.creatorDhawan, S.
dc.creatorGill, R.
dc.creatorHaeberli, W.
dc.creatorJinnouchi, O.
dc.creatorKhodinov, A.
dc.creatorMakdisi, Y.
dc.creatorNass, A.
dc.creatorSaito, N.
dc.creatorStephenson, E. J.
dc.creatorSvirida, D. N.
dc.creatorWise, T.
dc.creatorZelenski, A.
dc.date2005-12-31
dc.date.accessioned2026-07-07T06:58:07Z
dc.date.available2026-07-07T06:58:07Z
dc.descriptionA precise measurement of the analyzing power $A_N$ in proton-proton elastic scattering in the region of 4-momentum transfer squared $0.001 < |t| < 0.032 ({\rm GeV}/c)^2$ has been performed using a polarized atomic hydrogen gas jet target and the 100 GeV/$c$ RHIC proton beam. The interference of the electromagnetic spin-flip amplitude with a hadronic spin-nonflip amplitude is predicted to generate a significant $A_N$ of 4--5%, peaking at $-t \simeq 0.003 ({\rm GeV}/c)^2$. This kinematic region is known as the Coulomb Nuclear Interference region. A possible hadronic spin-flip amplitude modifies this otherwise calculable prediction. Our data are well described by the CNI prediction with the electromagnetic spin-flip alone and do not support the presence of a large hadronic spin-flip amplitude.
dc.description4pages, 4 figures
dc.identifierhttps://arxiv.org/abs/hep-ex/0601001
dc.identifierhttp://arxiv.org/abs/hep-ex/0601001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/107231
dc.subjectHigh Energy Physics - Experiment
dc.titleMeasurement of the Analyzing Power $A_N$ in $pp$ Elastic Scattering in the CNI Region with a Polarized Atomic Hydrogen Gas Jet Target
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