• Corpus ID: 7297486

ISOSPIN VIOLATION IN THE TWO-NUCLEON SYSTEM

@article{Epelbaum1999ISOSPINVI,
  title={ISOSPIN VIOLATION IN THE TWO-NUCLEON SYSTEM},
  author={Evgeny Epelbaum and Ulf-G. Mei{\ss}ner},
  journal={arXiv: Nuclear Theory},
  year={1999}
}

• E. Epelbaum, U. Meißner
• Published 17 March 1999
• Physics
• arXiv: Nuclear Theory

I discuss isospin violation in an effective field theory appraoch of the nucleon-nucleon interaction. The observed leading order charge independence breaking is explained in terms of one-pion exchange together with a four-nucleon contact term. A general classification scheme of corrections to this leading order results is presented and an explanation is offered why charge-dependent pion-nucleon coupling constants can not play a role in the observed isospin violation in the NN scattering lengths. Charge symmetry breaking, the size of $\pi\gamma$-exchange graphs and the pionless theory are also discussed.