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Constraints on CP violation in the Higgs sector from the rho parameter

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arxiv hep-ph/9305272 v1 pith:ZMRRHPYT submitted 1993-05-15 hep-ph

Constraints on CP violation in the Higgs sector from the rho parameter

classification hep-ph
keywords sectorsymmetryviolationcustodialhiggsallowedalthoughbounds
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We discuss the relation between the CP symmetry and the custodial $SU(2)$ symmetry in the Higgs sector. In particular, we show that CP violation in the Higgs-gauge sector is allowed only if the custodial $SU(2)$ symmetry is broken. We exploit these facts to constrain CP violation using the experimental bounds on $\rho-1$. CP nonconservation in the Higgs-fermion interactions can also be constrained in a similar way although a possible exception is pointed out.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. CP violation in H^\pm \to W^\pm Z: A physical approach for the 2HDM

    hep-ph 2026-02 conditional novelty 6.0

    H±→W±Z develops a one-loop CP-violating charge asymmetry in the 2HDM from internal bosonic and fermionic loop interferences, with the purely bosonic part vanishing in the alignment limit when the extra scalars are heavy.