Implications of Large-Nc QCD for the NN Interaction

We present a method for ordering two-nucleon interactions based upon their scaling with the number of QCD colors, N c , in the limit that N c becomes large. Available data in the two-nucleon sector show general agreement with this ordering, indicating that the method may be useful in other contexts...

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Bibliographic Details
Published in:Annual review of nuclear and particle science 2023-09, Vol.73 (1), p.123-152
Main Authors: Richardson, Thomas R, Schindler, Matthias R, Springer, Roxanne P
Format: Article
Language:English
Subjects:
effective field theories
few-nucleon interactions
large
large-NcQCD
NUCLEAR PHYSICS AND RADIATION PHYSICS
Physics
QCD
two-nucleon interactions
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Summary:We present a method for ordering two-nucleon interactions based upon their scaling with the number of QCD colors, N c , in the limit that N c becomes large. Available data in the two-nucleon sector show general agreement with this ordering, indicating that the method may be useful in other contexts where data are less readily available. However, several caveats and potential pitfalls can make the large- N c ordering fragile and/or vulnerable to misinterpretation. We discuss the application of the large- N c analysis to two- and three-nucleon interactions, including those originating from weak and BSM (beyond the Standard Model) interactions, as well as two-nucleon external currents. Finally, we discuss some open questions in the field.
ISSN:0163-8998
1545-4134
DOI:10.1146/annurev-nucl-102020-014052