Spin-dependent electron-proton scattering in the Delta-excitation region

L.D. van Buuren*, D. Szczerba, R. Alarcon, D.J. Boersma, J.F.J. van den Brand, H.J. Bulten, R. Ent, M. Ferro-Luzzi, M. Harvey, P. Heimberg, D.W. Higinbotham, S. Klous, H. Kolster, J. Lang, B.L. Militsyn, D. Nikolenko, B.E. Norum, I. Passchier, H.R. Poolman, I. RachekM.C. Simani, E. Six, H. de Vries, Z.L. Zhou

*Corresponding author for this work

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Abstract

We report on measurements of the cross section and provide first data on spin correlation parameters A(TT)('') and A(TL)('') in inclusive scattering of longitudinally polarized electrons from nuclear-polarized hydrogen. Polarized electrons were injected into an electron storage ring operated at a beam energy of 720 MeV. Polarized hydrogen was produced by an atomic beam source and injected into an open-ended cylindrical cell, located in the electron storage ring. The four-momentum transfer squared ranged from Q(2)=0.2 GeV2/c(2) at the elastic scattering peak to Q(2)=0.11 GeV2/c(2) at the Delta(1232) resonance. The data provide a stringent test of pion electroproduction models.
Original languageEnglish
Article number012001
Number of pages4
JournalPhysical Review Letters
Volume89
Issue number1
DOIs
Publication statusPublished - 1 Jul 2002
Externally publishedYes

Keywords

  • PION CLOUD
  • ELECTROPRODUCTION
  • POLARIZATION
  • TRANSITION
  • RESONANCE
  • TARGET
  • SPECTROMETER
  • MODEL

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