Low-Energy Effective Field Theory below the Electroweak Scale: Dimension-8 Operators

Abstract

We construct a complete basis of dimension-8 operators in the Low-Energy Effective Field Theory below the Electroweak Scale (LEFT). We find there are 35058 dimension-8 operators in the LEFT for two generations of up-type quarks and three generations of down-type quarks, charged leptons, and left-handed neutrinos. The existence of this operator basis is a necessary prerequisite for matching to the Standard Model Effective Field Theory at the dimension-8 level.

arXiv comment29 pages, 20 tables; v3: minor typos corrected

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