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A Poincaré Covariant Current Operator for Low and High Energy Phenomena

F. M. Lev, E. Pace, G. Salme`

nucl-tharXiv:nucl-th/9810054

Abstract

Within front-form dynamics and in the Breit frame where initial and final three-momenta of the system are directed along the z axis, Poincaré covariance constrains the current operator only through kinematical rotations around the z axis. Therefore, in this frame the current can be taken in the one-body form. Applications to deep inelastic structure functions in an exactly solvable model and to the deuteron magnetic form factor are presented.

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