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Dipole-dipole dispersion interactions between neutrons

  • Regular Article - Theoretical Physics
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Abstract.

We investigate the long-range interactions between two neutrons utilizing recent data on the neutron static and dynamic electric and magnetic dipole polarizabilities. The resulting long-range potentials are used to make quantitative comparisons between the collisions of a neutron with a neutron and a neutron with a proton. We also assess the importance of the first pion production threshold and first excited state of the nucleon, the \(\Delta\)-resonance (\(J^{\pi} = +3/2\), I = 3/2). We found both dynamical effects to be quite relevant for distances r between \(\sim 50\) fm up to \(\sim 10^{3}\) fm in the nn system, the neutron-wall system and in the wall-neutron-wall system, reaching the expected asymptotic limit beyond that. Relevance of our findings to the confinement of ultra cold neutrons inside bottles is discussed.

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Authors and Affiliations

  1. ITAMP, Harvard-Smithsonian Center for Astrophysics, MS 14, 60 Garden St., 02138, Cambridge, MA, USA

    James F. Babb

  2. Instituto de Física, Universidade de São Paulo, R. do Matão 1371, 05508-090, São Paulo, S.P., Brazil

    Renato Higa & Mahir S. Hussein

  3. Instituto de Estudos Avançados, Universidade de São Paulo, C.P. 72012, 05508-970, São Paulo, S.P., Brazil

    Mahir S. Hussein

  4. Departamento de Física, Instituto Tecnológico de Aeronáutica, CTA, São José dos Campos, S.P., Brazil

    Mahir S. Hussein

Authors
  1. James F. Babb
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  2. Renato Higa
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  3. Mahir S. Hussein
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Corresponding author

Correspondence to Mahir S. Hussein.

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Communicated by S. Hands

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Babb, J.F., Higa, R. & Hussein, M.S. Dipole-dipole dispersion interactions between neutrons. Eur. Phys. J. A 53, 126 (2017). https://doi.org/10.1140/epja/i2017-12313-7

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  • DOI: https://doi.org/10.1140/epja/i2017-12313-7

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