Charge-symmetry breaking in the nucleon-nucleon interaction

Paul George Langacker, D. A. Sparrow

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


New calculations of charge-symmetry breaking in the NN interaction lead to radically altered predictions for the difference between nn and pp scattering lengths. Inclusion of the η′ meson and use of realistic magnetic couplings for the vector meson changes the sign as well as the magnitude of earlier results. This sensitivity arises in part from cancellations within the pseudoscalar and vector contributions separately, making precise calculations difficult. Meson mixing is determined from quark mass differences, and the finite width of the ρ meson is included.

Original languageEnglish (US)
Pages (from-to)1559-1562
Number of pages4
JournalPhysical Review Letters
Issue number21
StatePublished - Jan 1 1979
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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