Single spin asymmetry A N in polarized proton–proton elastic scattering at √ s = 200 GeV
Author(s)
Balewski, Jan T.; Betancourt, Michael Joseph; Corliss, Ross Cameron; Hays-Wehle, James Prewitt; Leight, William Axel; Redwine, Robert P; Seele, Joseph Patrick; Steadman, Stephen G.; van Nieuwenhuizen, Gerrit J; ... Show more Show less
DownloadPublished version (657.9Kb)
Terms of use
Metadata
Show full item recordAbstract
We report a high precision measurement of the transverse single spin asymmetry AN at the center of mass energy s=200GeV in elastic proton-proton scattering by the STAR experiment at RHIC. The AN was measured in the four-momentum transfer squared t range 0.003≤|t|≤0.035(GeV/c)2, the region of a significant interference between the electromagnetic and hadronic scattering amplitudes. The measured values of AN and its t-dependence are consistent with a vanishing hadronic spin-flip amplitude, thus providing strong constraints on the ratio of the single spin-flip to the non-flip amplitudes. Since the hadronic amplitude is dominated by the Pomeron amplitude at this s, we conclude that this measurement addresses the question about the presence of a hadronic spin flip due to the Pomeron exchange in polarized proton-proton elastic scattering. © 2013 Elsevier B.V.
Date issued
2013Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science; Massachusetts Institute of Technology. Department of PhysicsJournal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publisher
Elsevier BV
Citation
Adamczyk, L., et al. "Single Spin Asymmetry an in Polarized Proton-Proton Elastic Scattering at Root S=200 Gev." Physics Letters B 719 1-3 (2013): 62-69.
Version: Final published version