On isovector meson exchange currents in the Bethe-Salpeter approach

Abstract

We investigate the nonrelativistic reduction of the Bethe-Salpeter amplitude for the deuteron electrodisintegration near threshold energies. To this end, two assumptions have been used in the calculations: 1) the static approximation and 2) the one iteration approximation. Within these assumptions it is possible to recover the nonrelativistic result including a systematic extension to relativistic corrections. We find that the so-called pair current term can be constructed from the $P$-wave contribution of the deuteron Bethe-Salpeter amplitude. The form factor that enters into the calculation of the pair current is constrained by the manifestly gauge independent matrix elements.

15 pages, incl. 3 figures, to be published Phys. Rev. C

References in corpus (1)

• Explicitly Covariant Light-Front Dynamics and Relativistic Few-Body Systems

Cited by in corpus (7)

• Two-Fermion Bound States within the Bethe-Salpeter Approach
• Relativistic effects in proton-induced deuteron break-up at intermediate energies with forward emission of a fast proton pair
• Covariant separable interaction for the neutron-proton system in ${}^3{S}_1$-${}^3{D}_1$ partial-wave state
• The Separable Kernel of Nucleon-Nucleon Interaction in the Bethe-Salpeter Approach
• Relativistic Contributions to Deuteron Photodisintegration in the Bethe-Salpeter Formalism
• Effects of negative energy components in two-body deuteron photodisintegratio
• Charge-Exchange Reaction pD->n(pp) in the Bethe-Salpeter Approach