Double Spin Asymmetries $A_{NN}$ and $A_{SS}$ at $\sqrt{s}$=200 GeV in Polarized Proton-Proton Elastic Scattering at RHIC

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.
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http://hal.in2p3.fr/in2p3-00149767
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Submitted on : Monday, May 28, 2007 - 2:27:38 PM
Last modification on : Wednesday, March 27, 2019 - 4:40:13 PM

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S. Bultmann, I. H. Chiang, R. E. Chrien, A. Drees, R. L. Gill, et al.. Double Spin Asymmetries $A_{NN}$ and $A_{SS}$ at $\sqrt{s}$=200 GeV in Polarized Proton-Proton Elastic Scattering at RHIC. Physics Letters B, Elsevier, 2007, 647, pp.98-103. ⟨10.1016/j.physletb.2007.01.067⟩. ⟨in2p3-00149767⟩

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