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Electric dipole moment constraints on CP-violating light-quark Yukawas · Around

2018

Electric dipole moment constraints on CP-violating light-quark Yukawas

Brod, Joachim, Skodras, Dimitrios

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Nonstandard CP violation in the Higgs sector can play an essential role in electroweak baryogenesis.

We calculate the full two-loop matching conditions of the standard model, with Higgs Yukawa couplings to light quarks modified to include arbitrary CP-violating phases, onto an effective Lagrangian comprising CP-odd electric and chromoelectric light-quark (up, down, and strange) dipole operators.
We find large isospin-breaking contributions of the electroweak diagrams.
Using these results, we obtain significant constraints on the phases of the light-quark Yukawas from experimental bounds on the neutron and mercury electric dipole moments.

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