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

Autor: Marc Riembau, Giuliano Panico, Alex Pomarol
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Nuclear and High Energy Physics
Particle physics
Dimension (graph theory)
FOS: Physical sciences
Electron
ddc:500.2
Effective field theories
leptoquark
01 natural sciences
violation [CP]
selection rule
anomalous dimension
High Energy Physics - Phenomenology (hep-ph)
effective field theory
0103 physical sciences
TeV [scale]
lcsh:Nuclear and particle physics. Atomic energy. Radioactivity
ddc:530
electric moment [electron]
010306 general physics
Physics
composite [Higgs model]
010308 nuclear & particles physics
High Energy Physics::Phenomenology
dipole [operator]
minimal supersymmetric standard model
Effective Field Theories
helicity
Electron electric dipole moment
Helicity
Electric dipole moment
Dipole
High Energy Physics - Phenomenology
CP violation
Composite Higgs models
Beyond Standard Model
Higgs boson
lcsh:QC770-798
High Energy Physics::Experiment
Beyond standard model
operator [electron]
Zdroj: Journal of High Energy Physics, Vol. 1904 (2019) P. 090
Journal of high energy physics 1904(04), 090 (2019). doi:10.1007/JHEP04(2019)090
Dipòsit Digital de Documents de la UAB
Universitat Autònoma de Barcelona
Journal of High Energy Physics
Journal of High Energy Physics, Vol 2019, Iss 4, Pp 1-32 (2019)
ISSN: 1029-8479
DOI: 10.1007/JHEP04(2019)090
Popis: The ACME collaboration has recently reported a new bound on the electric dipole moment (EDM) of the electron, $|d_e|< 1.1 \times 10^{-29}\, {\rm e\cdot cm}$ 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.
30 pages, 4 figures; v2: improved discussion about the ambiguities in the choice of the EFT basis and on the regularization procedure; new results on EDM contributions from vector leptoquarks; v3: typos corrected
Databáze: OpenAIRE
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