Interpreting the electron EDM constraint

doi:10.1007/JHEP05(2019)059

Interpreting the electron EDM constraint

2019-05-10

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DOI：10.1007/JHEP05(2019)059

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The ACME collaboration has recently announced a new constraint on the electron EDM, jdej < 1 : 1 10 e cm, from measurements of the ThO molecule. This is a powerful constraint on CP-violating new physics: even new physics generating the EDM at two loops is constrained at the multi-TeV scale. We interpret the bound in the context of di ff erent scenarios for new physics: a general order-of-magnitude analysis for both the electron EDM and the CP-odd electron-nucleon coupling; 1-loop SUSY, probing sleptons above 10TeV; 2-loop SUSY, probing multi-TeV charginos or stops; and fi nally, new physics that generates the EDM via the charm quark or top quark Yukawa couplings. In the last scenario, new physics generates a \ QULE operator (qf uf) (` e), which in turn generates the EDM through RG evolution. If the QULE operator is generated at tree level, this corresponds to a previously studied leptoquark model. For the fi rst time, we also classify scenarios in which the QULE operator is generated at one loop through a box diagram, which include (among others) SUSY and leptoquark models. The electron EDM bound is the leading constraint on a wide variety of theories of CP-violating new physics interacting with the Higgs boson or the top quark. We argue that any future nonzero measurement of an electron EDM will provide a strong motivation for constructing new colliders at the highest feasible energies.

Keyword:

Beyond Standard Model

Supersymmetric Standard Model

Interpreting the electron EDM constraint

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