Origin of Relativistic Effects in the Reaction D(e,e'p)n at GeV Energies

Details Origin of Relativistic Effects in the Reaction D(e,e'p)n at GeV Energies Origin of Relativistic Effects in the Reaction D(e,e'p)n at GeV Energies

1999-11-17

arxiv.org/abs/nucl-th/9911063v1

Physics

Nuclear Physics

Nuclear Theory

25 pages, 11 figures

Scientific paper

In a series of recent publications, a new approach to the non-relativistic reduction of the electromagnetic current operator in calculations of electro-nuclear reactions has been introduced. In one of these papers, the conjecture that at energies of a few GeV, the bulk of the relativistic effects comes from the current and not from the nuclear dynamics was made, based on the large relativistic effects in the transverse-longitudinal response. Here, we explicitly compare a fully relativistic, manifestly covariant calculation performed with the Gross equation, with a calculation that uses a non-relativistic wave function and a fully relativistic current operator. We find very good agreement up to missing momenta of 400 MeV/c, thus confirming the previous conjecture. We discuss slight deviations in cross sections for higher missing momenta and their possible origin, namely p-wave contributions and off-shell effects.

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