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23 April 2024

» arxiv » nucl-ex/0610022

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Double Spin Asymmetries A_NN and A_SS at sqrt{s}=200 GeV in Polarized Proton-Proton Elastic Scattering at RHIC
pp2pp Collaboration ; S. Bultmann ; I.H. Chiang ; R.E. Chrien ; A. Drees ; R.L. Gill ; W. Guryn ; J. Landgraf ; T.A. Ljubicic ; D. Lynn ; C. Pearson ; P. Pile ; A. Rusek ; M. Sakitt ; S. Tepikian ; K. Yip ; J. Chwastowski ; B. Pawlik ; M. Haguenauer ; A.A. Bogdanov ; S.B. Nurushev ; M.F. Runtzo ; M.N. Strikhanov ; I.G. Alekseev ; V.P. Kanavets ; L.I. Koroleva ; B.V. Morozov ; D.N. Svirida ; A. Khodinov ; M. Rijssenbeek ; L. Whitehead ; S. Yeung ; K. De ; N. Guler ; J. Li ; N. Ozturk ; A. Sandacz ;
Date:	16 Oct 2006
Abstract:	We present the first measurements of the double spin asymmetries A_NN and A_SS at sqrt{s}=200 GeV, obtained by the pp2pp experiment using polarized proton beams at the Relativistic Heavy Ion Collider (RHIC). The data were collected in the four momentum transfer t range 0.01< t <0.03 (GeV/c)^2. The measured asymmetries, which are consistent with zero, allow us to estimate upper limits on the double helicity-flip amplitudes phi_2 and phi_4 at small t as well as on the difference Delta(sigma_T) between the total cross sections for transversely polarized protons with antiparallel or parallel spin orientations.
Source:	arXiv, nucl-ex/0610022
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