A basis of dimension-eight operators for anomalous neutral triple gauge boson interactions

Abstract

Four independent dimension-eight operators give rise to anomalous neutral triple gauge boson interactions, one CP-even and three CP-odd. Only the CP-even operator interferes with the Standard Model for the production of a pair of on-shell neutral bosons. However, the effects are found to be tiny due mainly to the mismatch of the Z boson polarization between the productions from the SM and the new operator.

13 pages, v2 : typo corrected in eqs., ref. added, published version

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