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Cirigliano, Vincenzo; Dekens, Wouter; de Vries, Jordy; Fuyuto, Kaori; Mereghetti, Emanuele; Ruiz, Richard

Leptonic anomalous magnetic moments in ν SMEFT

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  • Medientyp: E-Artikel
  • Titel: Leptonic anomalous magnetic moments in ν SMEFT
  • Beteiligte: Cirigliano, Vincenzo; Dekens, Wouter; de Vries, Jordy; Fuyuto, Kaori; Mereghetti, Emanuele; Ruiz, Richard
  • Erschienen: Springer Science and Business Media LLC, 2021
  • Erschienen in: Journal of High Energy Physics
  • Sprache: Englisch
  • DOI: 10.1007/jhep08(2021)103
  • ISSN: 1029-8479
  • Entstehung:
  • Anmerkungen:
  • Beschreibung: <jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>We investigate contributions to the anomalous magnetic moments of charged leptons in the neutrino-extended Standard Model Effective Field Theory (<jats:italic>ν</jats:italic>SMEFT). We discuss how <jats:italic>ν</jats:italic>SMEFT operators can contribute to a lepton’s magnetic moment at one- and two-loop order. We show that only one operator can account for existing electronic and muonic discrepancies, assuming new physics appears above 1 TeV. In particular, we find that a right-handed charged current in combination with minimal sterile-active mixing can explain the discrepancy for sterile neutrino masses of <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \mathcal{O} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>O</mml:mi> </mml:math></jats:alternatives></jats:inline-formula>(100) GeV while avoiding direct and indirect constraints. We discuss how searches for sterile neutrino production at the (HL-)LHC, measurements of <jats:italic>h</jats:italic><jats:italic>→</jats:italic><jats:italic>μ</jats:italic><jats:sup>+</jats:sup><jats:italic>μ</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup> and searches for <jats:italic>h</jats:italic><jats:italic>→</jats:italic><jats:italic>e</jats:italic><jats:sup>+</jats:sup><jats:italic>e</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup>, neutrinoless double beta decay experiments, and improved unitarity tests of the CKM matrix can further probe the relevant parameter space.</jats:p>
  • Zugangsstatus: Freier Zugang