Dynamical Higher-Twist and High x Phenomena: A Window to Quark-Quark Correlations in QCD
نویسنده
چکیده
Measurements of the power-law corrections to Bjorken scaling and the behavior of structure functions in the highly stressed xbj → 1 regime of electroproduction can lead to new information on the quark-quark correlations controlling the nucleon wavefunction at far-off-shell kinematics. Electroproduction on nuclei at A > xbj > 1 are sensitive to hidden-color components of the nuclear wavefunction. A distinctive dynamical higher-twist O(1/Q2) correction, which is dynamically enhanced at high xbj, can arise from the interference of amplitudes where the lepton scatters from two different valence quarks of the target. Measurements of the parity-violating left-right asymmetry ALR in elastic and inelastic polarized electron scattering at large xbj can confirm the structure of the quark-quark correlations and other QCD physics at the amplitude level.
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