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New short-range electromagnetic current in the deuteron

  • Nuclei
  • Theory
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Abstract

A new model for short-range isoscalar current in the deuteron and NN system is developed and tested on a variety of isoscalar magnetic observables such as the deuteron magnetic moment, magnetic form factor, and the circular polarization of photons at \(\overrightarrow n p\) radiative capture at thermal neutron energies. The model for electromagnetic two-nucleon current proposed in the paper is based on generation of an intermediate dibaryon in the short-range NN interaction. This intermediate dibaryon, in turn, is treated within the new model for intermediate and short-range NN interaction recently proposed by the present authors. The transition current model developed here satisfies the current conservation relation by the construction. Our calculations have demonstrated that the new current model, using only one parameter (with a clear physical meaning), is able to describe, in very good agreement with the experimental data, three basic deuteron observables of magnetic type, viz., the magnetic moment, the photon circular polarization in the \(p(\overrightarrow n ,\overrightarrow \gamma )d\) process, and the structure function B(Q 2) up to Q 2 ≃ 60 fm−2.

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Authors and Affiliations

  1. Institute of Nuclear Physics, Moscow State University, Moscow, Russia

    V. I. Kukulin, I. T. Obukhovsky & V. N. Pomerantsev

  2. Institute of Physics, Tübingen, Germany

    P. Grabmayr

  3. Institute for Theoretical Physics, Tübingen, Germany

    A. Faessler

Authors
  1. V. I. Kukulin
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  2. I. T. Obukhovsky
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  3. V. N. Pomerantsev
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  4. P. Grabmayr
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  5. A. Faessler
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Kukulin, V.I., Obukhovsky, I.T., Pomerantsev, V.N. et al. New short-range electromagnetic current in the deuteron. Phys. Atom. Nuclei 70, 215–230 (2007). https://doi.org/10.1134/S1063778807020020

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  • DOI: https://doi.org/10.1134/S1063778807020020

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