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arXiv · 2407.05085

Representation-theoretical characterization of canonical custodial symmetry in NHDM potentials

R. Plantey·M. Aa. Solberg
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Abstract

By considering the basis-covariant constituents of N-Higgs-doublet potentials, we derive necessary and sufficient conditions for canonical SO(4)_C Custodial Symmetry (CS) of potentials with N>2 doublets, based on representation-theoretical and geometrical relations. In essence, our characterization relates the presence of canonical CS to basis-covariant vectors corresponding to particular bases of the defining representation of the orthogonal Lie algebras. For N=3,4 and 5, the conditions demand little computational effort to be evaluated, and we provide practical algorithms that may be efficiently implemented in a computer program, for deciding whether or not a potential is custodial-symmetric.

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R. Plantey, M. Aa. Solberg. 2024-07-06. Representation-theoretical characterization of canonical custodial symmetry in NHDM potentials. https://doi.org/10.1016/j.nuclphysb.2024.116650

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