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Relativistic Studies of Few-Body Systems Using the Bethe–Salpeter Approach

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Abstract

The Bethe–Salpeter equation is one of the most appropriate tools in quantum field theory for the treatment of bound state systems. We review two problems in this approach: (i) the influence of the cross-ladder (non-planar) interaction kernel with color degrees of freedom in two-boson systems; and (ii) the higher Fock-state contributions to the three-boson bound state. Some new calculations have been performed to illustrate the previous topics.

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Authors and Affiliations

  1. Instituto Tecnológico de Aeronáutica, Università di Roma ’La Sapienza’ & INFN (Sezione di Roma), Rome, Italy

    J. H. Alvarenga Nogueira

  2. Instituto Tecnológico de Aeronáutica, DCTA, São José dos Campos, 12228-900, Brazil

    E. Ydrefors & T. Frederico

  3. Istituto Nazionale di Fisica Nucleare, Sezione di Roma, Piazzale Moro 2, 00185, Rome, Italy

    G. Salmè

Authors
  1. J. H. Alvarenga Nogueira
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  2. E. Ydrefors
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  3. T. Frederico
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  4. G. Salmè
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Correspondence to J. H. Alvarenga Nogueira.

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Nogueira, J.H.A., Ydrefors, E., Frederico, T. et al. Relativistic Studies of Few-Body Systems Using the Bethe–Salpeter Approach. Few-Body Syst 59, 94 (2018). https://doi.org/10.1007/s00601-018-1418-3

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  • DOI: https://doi.org/10.1007/s00601-018-1418-3

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