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First Measurement of A_N at sqrt(s)=200 GeV in Polarized Proton-Proton Elastic Scattering at RHIC | S. Bueltmann
; et al.
; | Date: |
25 Jul 2005 | Subject: | nucl-ex hep-ex | Affiliation: | pp2pp collaboration | 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. | Source: | arXiv, nucl-ex/0507030 | Services: | Forum | Review | PDF | Favorites |
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