Wigner Symmetry in the Limit of Large Scattering Lengths

Phys. Rev. Lett. 83, 931 – Published 2 August 1999
Thomas Mehen, Iain W. Stewart, and Mark B. Wise


We note that, in the limit where the NN S01 and S13 scattering lengths, a(1S0) and a(3S1), go to infinity, the leading terms in the effective field theory for strong NN interactions are invariant under Wigner's SU(4) spin-isospin symmetry. This explains why the leading effects of radiation pions on the S-wave NN scattering amplitudes vanish as a(1S0) and a(3S1) go to infinity. The implications of Wigner symmetry for NNNN axion and γdnp are also considered.

DOI: http://dx.doi.org/10.1103/PhysRevLett.83.931

  • Received 22 February 1999
  • Published in the issue dated 2 August 1999

© 1999 The American Physical Society

Authors & Affiliations

Thomas Mehen, Iain W. Stewart, and Mark B. Wise

  • California Institute of Technology, Pasadena, California 91125

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