Abstract
Violations of parity (P) and time reversal invariance (T) in few-nucleon systems provide interesting tests of our understanding of the Standard Model as well as sensitive probes of Beyond-the-Standard-Model physics. Because of the small size of the symmetry-violating effects, experimental constraints on symmetry-violating nucleon-nucleon interactions are currently weak, if they exist at all. We analyze both P-violating T-conserving and P-violating T-violating nucleon-nucleon interactions in terms of the large-\(N_c\) expansion of QCD to provide additional theoretical constraints. This analysis leads to a hierarchy of terms in symmetry-violating potentials, establishes relations between couplings, and helps to delineate the terms that should be most important in phenomenological applications.
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This article belongs to the Topical Collection “The 23rd European Conference on Few-Body Problems in Physics”.
This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under Award Number DE-SC0010300.
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Schindler, M.R. Parity- and Time-Reversal-Invariance-Violating Nucleon-Nucleon Interactions in the Large-\(N_c\) Expansion. Few-Body Syst 58, 68 (2017). https://doi.org/10.1007/s00601-017-1235-0
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DOI: https://doi.org/10.1007/s00601-017-1235-0