Franz Wesselmann

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We present a Next-to-Leading order perturbative QCD analysis of world data on the spin dependent structure functions g p 1 , g n 1 , and g d 1 , including the new experimental information on the Q 2 dependence of g n 1. Careful attention is paid to the experimental and theoretical uncertainties. The data constrain the first moments of the polarized valence(More)
We propose to make definitive measurements of the deuteron spin structure function g d 1 /F d 1 in the deep-inelastic kinematics accessible with a 6 GeV beam at JLab. The principal goal is to provide the low Q 2 anchor points for NLO pQCD plus higher twist fits to g d 1 /F d 1 , which is particularly sensitive to ∆G(x) (the polarized gluon density of the(More)
The upgraded 11 GeV CEBAF polarized electron beam presents a compelling opportunity to measure a weak neutral current amplitude to unprecedented precision at Q 2 M 2 Z. The result would yield a precise measurement of the weak mixing angle sin 2 θ W , a fundamental parameter of the electroweak theory. The experimental goal of δ(sin 2 θ W) ∼ 0.1%, matching(More)
JLab has been at the forefront of a program to measure the nucleon spin-dependent structure functions over a wide kinematic range, and data of unprecedented quality has been extracted in all three experimental halls. Higher moments of these quantities have proven to be powerful tools to test QCD sum rules and will provide benchmark tests of Lattice QCD and(More)
We propose to measure the electroproduction of J/Ψ meson cross section off a proton near threshold (4.05 GeV < W < 4.45 GeV and |t − t min | < 2.5 GeV 2) with an 11 GeV electron beam. The high luminosity JLab 12 GeV upgrade electron beam combined with the large acceptance device SoLID in Hall A allow for a fully exclusive measurement of this process near(More)
We present new measurements of electron scattering from high-momentum nucleons in nuclei. These data allow an improved determination of the strength of two-nucleon correlations for several nuclei, including light nuclei where clustering effects can, for the first time, be examined. The data also include the kinematic region where three-nucleon correlations(More)