EFT approach to the electron electric dipole moment at the two-loop level

Panico, Giuliano (0000 0004 0492 0453, grid.7683.a, Deutsches Elektronen-Synchrotron (DESY), 22607, Hamburg, Germany) ; Pomarol, Alex (grid.7080.f, IFAE and BIST, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain) (grid.7080.f, Departamento de Física, Universitat Autònoma de Barcelona, 08193, Bellaterra, Barcelona, Spain) ; Riembau, Marc (0000 0001 2322 4988, grid.8591.5, Départment de Physique Théorique, Université de Genève, Genève, Switzerland)

12 April 2019

Abstract: The ACME collaboration has recently reported a new bound on the electric dipole moment (EDM) of the electron, | d e | < 1.1 × 10 −29 e · cm at 90% confidence level, reaching an unprecedented accuracy level. This can translate into new relevant constraints on theories beyond the SM laying at the TeV scale, even when they contribute to the electron EDM at the two-loop level. We use the EFT approach to classify these corrections, presenting the contributions to the anomalous dimension of the CP-violating dipole operators of the electron up to the two-loop level. Selection rules based on helicity and CP play an important role to simplify this analysis. We use this result to provide new bounds on BSM with leptoquarks, extra Higgs, or constraints in sectors of the MSSM and composite Higgs models. The new ACME bound pushes natural theories significantly more into fine-tune territory, unless they have a way to accidentally preserve CP.

Published in: JHEP 1904 (2019) 090 DOI: 10.1007/JHEP04(2019)090
arXiv: 1810.09413
License: CC-BY-4.0

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