AI Article Synopsis
- Measurements were conducted on the cross section and spin correlation parameters A(TT') and A(TL') during the scattering of longitudinally polarized electrons off nuclear-polarized hydrogen.
- Polarized electrons were injected into a storage ring at an energy of 720 MeV, while polarized hydrogen was created and introduced into a cylindrical cell within the ring.
- The four-momentum transfer squared ranged from Q² = 0.2 GeV²/c² at the elastic peak to Q² = 0.11 GeV²/c² at the Delta(1232) resonance, allowing for a rigorous evaluation of pion electroproduction models.
Article 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 Q2 = 0.2 GeV(2)/c(2) at the elastic scattering peak to Q2 = 0.11 GeV(2)/c(2) at the Delta(1232) resonance. The data provide a stringent test of pion electroproduction models.
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| http://dx.doi.org/10.1103/PhysRevLett.89.012001 | DOI Listing |
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