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arxiv: 1410.4193 · v2 · submitted 2014-10-15 · ✦ hep-ph

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Extending the Standard Model Effective Field Theory with the Complete Set of Dimension-7 Operators

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classification ✦ hep-ph
keywords modeloperatorsstandarddimension-7completeeffectivefieldindependent
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We present a complete list of the independent dimension-7 operators that are constructed using the Standard Model degrees of freedom and are invariant under the Standard Model gauge group. This list contains only 20 independent operators; far fewer than the 63 operators available at dimension 6. All of these dimension-7 operators contain fermions and violate lepton number, and 7 of the 20 violate baryon number as well. This result extends the Standard Model Effective Field Theory (SMEFT) and allows a more detailed exploration of the structure and properties of possible deformations from the Standard Model Lagrangian.

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Cited by 3 Pith papers

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