Interpreting the electron EDM constraint
Abstract The ACME collaboration has recently announced a new constraint on the electron EDM, |d e | < 1.1 × 10−29 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-Te...
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doaj-b0dad7b01fc0479ca6e0321efac33c092020-11-25T03:10:03ZengSpringerOpenJournal of High Energy Physics1029-84792019-05-012019514810.1007/JHEP05(2019)059Interpreting the electron EDM constraintCari Cesarotti0Qianshu Lu1Yuichiro Nakai2Aditya Parikh3Matthew Reece4Department of Physics, Harvard UniversityDepartment of Physics, Harvard UniversityDepartment of Physics and Astronomy, Rutgers UniversityDepartment of Physics, Harvard UniversityDepartment of Physics, Harvard UniversityAbstract The ACME collaboration has recently announced a new constraint on the electron EDM, |d e | < 1.1 × 10−29 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 different 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 10 TeV; 2-loop SUSY, probing multi-TeV charginos or stops; and finally, 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” q f σ ¯ μ ν u ¯ f · ℓ σ ¯ μ ν e ¯ $$ \left({q}_f{\overline{\sigma}}^{\mu \nu }{\overline{u}}_f\right)\kern0.5em \cdotp \kern0.5em \left(\ell {\overline{\sigma}}_{\mu \nu}\overline{e}\right) $$ , 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 first 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.http://link.springer.com/article/10.1007/JHEP05(2019)059Beyond Standard ModelSupersymmetric Standard Model |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Cari Cesarotti Qianshu Lu Yuichiro Nakai Aditya Parikh Matthew Reece |
spellingShingle |
Cari Cesarotti Qianshu Lu Yuichiro Nakai Aditya Parikh Matthew Reece Interpreting the electron EDM constraint Journal of High Energy Physics Beyond Standard Model Supersymmetric Standard Model |
author_facet |
Cari Cesarotti Qianshu Lu Yuichiro Nakai Aditya Parikh Matthew Reece |
author_sort |
Cari Cesarotti |
title |
Interpreting the electron EDM constraint |
title_short |
Interpreting the electron EDM constraint |
title_full |
Interpreting the electron EDM constraint |
title_fullStr |
Interpreting the electron EDM constraint |
title_full_unstemmed |
Interpreting the electron EDM constraint |
title_sort |
interpreting the electron edm constraint |
publisher |
SpringerOpen |
series |
Journal of High Energy Physics |
issn |
1029-8479 |
publishDate |
2019-05-01 |
description |
Abstract The ACME collaboration has recently announced a new constraint on the electron EDM, |d e | < 1.1 × 10−29 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 different 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 10 TeV; 2-loop SUSY, probing multi-TeV charginos or stops; and finally, 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” q f σ ¯ μ ν u ¯ f · ℓ σ ¯ μ ν e ¯ $$ \left({q}_f{\overline{\sigma}}^{\mu \nu }{\overline{u}}_f\right)\kern0.5em \cdotp \kern0.5em \left(\ell {\overline{\sigma}}_{\mu \nu}\overline{e}\right) $$ , 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 first 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. |
topic |
Beyond Standard Model Supersymmetric Standard Model |
url |
http://link.springer.com/article/10.1007/JHEP05(2019)059 |
work_keys_str_mv |
AT caricesarotti interpretingtheelectronedmconstraint AT qianshulu interpretingtheelectronedmconstraint AT yuichironakai interpretingtheelectronedmconstraint AT adityaparikh interpretingtheelectronedmconstraint AT matthewreece interpretingtheelectronedmconstraint |
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1724660965898715136 |