Lorentz-violating contributions to the nuclear Schiff moment and nuclear EDM

Araujo, Jonas B.; Casana, R.; Ferreira, Manoel M.

doi:10.1103/physrevd.97.055032

Cited by 11 publications

(9 citation statements)

References 86 publications

(97 reference statements)

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“…For experimental purposes, as this tensor background has no diagonal components, C ii = 0, the contributions ( 21) could only be probed with a magnetic field orthogonal to the spin, as discussed in Refs. [32,34]. The same conclusions hold for the neutrino counterparts.…”

Section: Cpt-odd Dimension Five Nonminimal LV Electroweak Couplingsupporting

confidence: 67%

“…TABLE III: EDM, WEDM, MDM and WMDM contibutions to the hamiltonian of the lepton nonminimal coupling (34).…”

Section: A Rank−2 Nonminimal Couplingmentioning

confidence: 99%

“…All these terms are shown in Table (III), which contains the EDM, WEDM, MDM and WMDM contributions to the Hamiltonian of the lepton NM coupling in Eq. (34).…”

Section: A Rank−2 Nonminimal Couplingmentioning

confidence: 99%

“…Electron EDM experimental data has yielded upper bounds as tight as 10 −25 (eV) −1 on the magnitude of these couplings. Considering the Schiff screening theorem [33], anisotropic electrostatic interactions were taken into account in order to engender LV corrections on the nuclear EDM and Schiff moment [34]. Recently, general dimension six nonminimal fermion-fermion couplings were proposed [35] and constrained at the level of 10 −15 (GeV) −2 by EDM data [36], considering these couplings as electron-nucleon P-odd and T-odd atomic interactions.…”

Section: Introductionmentioning

confidence: 99%

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Constraining EDM and MDM lepton dimension five interactions in the electroweak sector

Araujo,

Mouchrek-Santos,

Santos

et al. 2020

Preprint

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We investigate dimension five Lorentz-violating nonminimal interactions in the electroweak sector, in connection with the possible generation of electric dipole moment (EDM), weak electric dipole moment (WEDM), magnetic dipole moment (MDM) and weak magnetic dipole moment (WMDM) for leptons. These couplings are composed of the physical fields and LV tensors of ranks ranging from 1 to 4. The CPT-odd couplings do no generate EDM behavior and do not provide the correct MDM signature, while the CPT-even ones yield EDM and MDM behavior, being subject to improved constraining. Tau lepton experimental data is used to constrain the WEDM and WMDM couplings to the level of 10 −4 (GeV) −1 , whereas electron MDM and EDM data is employed to improve constraints to the level of 10 −17 (GeV) −1 and 10 −11 (GeV) −1 , respectively.

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Section: Cpt-odd Dimension Five Nonminimal LV Electroweak Couplingsupporting

confidence: 67%

“…TABLE III: EDM, WEDM, MDM and WMDM contibutions to the hamiltonian of the lepton nonminimal coupling (34).…”

Section: A Rank−2 Nonminimal Couplingmentioning

confidence: 99%

“…All these terms are shown in Table (III), which contains the EDM, WEDM, MDM and WMDM contributions to the Hamiltonian of the lepton NM coupling in Eq. (34).…”

Section: A Rank−2 Nonminimal Couplingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Constraining EDM and MDM lepton dimension five interactions in the electroweak sector

Araujo,

Mouchrek-Santos,

Santos

et al. 2020

Preprint

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“…The emergence of contributions to these electromagnetic moments as byproducts of Lorentz-invariance nonconservation, has been addressed by the authors of Refs. [28,29,[37][38][39][40][41][42]. Under the assumption of Lorentz invariance, contributions to AMMs and EDMs are identified from the well-known parametrization of the electromagnetic vertex A µ l A l A , given by u A (p ′ ) Γ µ u A (p), with u A the momentum-space Dirac spinor for a charged lepton l A with mass m A , and Γ µ given by [43][44][45]…”

Section: Introductionmentioning

confidence: 99%

Bounds on Lorentz-violating Yukawa couplings via lepton electromagnetic moments

Ahuatzi-Avendaño,

Montaño,

Novales-Sánchez

et al. 2020

Preprint

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The effective-Lagrangian description of Lorentz-invariance violation provided by the so-called Standard-Model Extension covers all the sectors of the Standard Model, allowing for modelindependent studies of high-energy phenomena that might leave traces at relatively-low energies. In this context, the quantification of the large set of parameters characterizing Lorentz-violating effects is well motivated. In the present work, effects from the Lorentz-nonconserving Yukawa sector on the electromagnetic moments of charged leptons are calculated, estimated, and discussed. Following a perturbative approach, explicit expressions of leading contributions are derived and upper bounds on Lorentz violation are estimated from current data on electromagnetic moments. Scenarios regarding the coefficients of Lorentz violation are considered. In a scenario of two-point insertions preserving lepton flavor, the bound on the electron electric dipole moment yields limits as stringent as 10 −28 , whereas muon and tau-lepton electromagnetic moments determine bounds as restrictive as 10 −14 and 10 −6 , respectively. Another scenario, defined by the assumption that Lorentz-violating Yukawa couplings are Hermitian, leads to less stringent bounds, provided by the muon anomalous magnetic moment, which turn out to be as restrictive as 10 −14 .

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