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Single-Spin Beam Asymmetry in Semi-Exclusive Deep-Inelastic Electroproduction
Andrei Afanasev, C. E. Carlson
Recent measurements from Jefferson Lab show significant beam single spin asymmetries in deep inelastic scattering. The asymmetry is due to interference of longitudinal and transver…
Interplay of Hard and Soft Processes at JLab Energies
Andrei Afanasev, Carl E. Carlson
Even at moderate energy machines, there is a regime where hard pion electroproduction proceeds by a perturbatively calculable process. The process, we claim, is not the leading twi…
Baryon Form Factors in QCD
Carl E. Carlson
This is a summary of perturbative QCD calculations of baryon form factors. For e^+ e^- going to baryon-antibaryon pairs, normalized calculations are available and reported for the…
Predictions for the Decays of Radially-Excited Baryons
Carl E. Carlson
We consider decays of the lowest-lying radially excited baryons. Assuming a single-quark decay approximation, and negligible configuration mixing, we make model-independent predict…
What we know about the Theoretical Foundation of Duality in Electron Scattering
Carl E. Carlson
We consider some of the things that we understand about the theoretical underpinnings of duality, including items such as why the resonance peak/background ratio is constant in gen…
High Transverse Momentum Meson Production: A Different Way To Probe Hadron Structure
Carl E. Carlson
Hard, or high transverse momentum, pion photoproduction can be a tool for probing the parton structure of the beam and target. We discuss the perturbative and soft processes that c…