First Measurement of A_N at sqrt(s)=200 GeV in Polarized Proton-Proton Elastic Scattering at RHIC

Abstract

We report on the first measurement of the single spin analyzing power (A_N) at sqrt(s)=200GeV, obtained by the pp2pp experiment using polarized proton beams at the Relativistic Heavy Ion Collider (RHIC). Data points were measured in the four momentum transfer t range 0.01 < |t| < 0.03 (GeV/c)^2. Our result, averaged over the whole t-interval is about one standard deviation above the calculation, which uses interference between electromagnetic spin-flip amplitude and hadronic non-flip amplitude, the source of A_N. The difference could be explained by an additional contribution of a hadronic spin-flip amplitude to A_N.

13 pages, 5 figures. New values of polarization errors. Final version submitted to Phys. Lett. B

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Cited by in corpus (8)

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• Measurement of the analyzing power in pp elastic scattering in the peak CNI region at RHIC
• Single Spin Asymmetry $A_N$ in Polarized Proton-Proton Elastic Scattering at $\sqrt{s}=200$ GeV
• Generalized parton distributions and rapidity gap survival in exclusive diffractive pp scattering
• Where do we stand with a 3-D picture of the proton?
• Spin asymmetries for elastic proton scattering and the spin dependent couplings of the Pomeron
• Double Spin Asymmetries A_NN and A_SS at sqrt{s}=200 GeV in Polarized Proton-Proton Elastic Scattering at RHIC
• Impact picture for the analyzing power $A_N$ in very forward $pp$ elastic scattering