Leptonic anomalous magnetic moments in ν SMEFT
Vincenzo Cirigliano,Wouter Dekens,Jordy de Vries,Jordy de Vries,Kaori Fuyuto,Emanuele Mereghetti,Richard Ruiz +6 more
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In this paper, the anomalous magnetic moments of charged leptons in neutrino-extended standard model effective field theory (νSMEFT) were investigated and only one operator can account for existing electronic and muonic discrepancies, assuming new physics appears above 1 TeV.Abstract:
We investigate contributions to the anomalous magnetic moments of charged leptons in the neutrino-extended Standard Model Effective Field Theory (νSMEFT). We discuss how νSMEFT 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 $$ \mathcal{O} $$
(100) GeV while avoiding direct and indirect constraints. We discuss how searches for sterile neutrino production at the (HL-)LHC, measurements of h → μ+μ− and searches for h → e+e−, neutrinoless double beta decay experiments, and improved unitarity tests of the CKM matrix can further probe the relevant parameter space.read more
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The present and future status of heavy neutral leptons
Asli Abdullahi,Pablo Barham Alzás,Brian Batell,James Beacham,Alexey Boyarsky,Saneli Carbajal,Animesh Chatterjee,J. I. Crespo-Anadón,Frank F. Deppisch,A. De Roeck,Marco Drewes,Alberto Martin Gago,R. Gonzalez Suarez,Evgueni Goudzovski,A. Hatzikoutelis,Josu Hernandez-Garcia,M. Hostert,Marco Hufnagel,Philip Ilten,A. Izmaylov,K. Kelley,Juraj Klaric,Joachim Kopp,Suchita Kulkarni,M. Lamoureux,G. Lanfranchi,Jacobo Lopez-Pavon,Oleksii Mikulenko,Michael Mooney,Miha Nemevšek,Maksym Ovchynnikov,Silvia Pascoli,Ryan Plestid,Mohamed Rashad Darwish,Federico Leo Redi,Oleg Ruchayskiy,Richard Ruiz,Mikhail Shaposhnikov,Lesya Shchutska,Ian M. Shoemaker,Robert Shrock,Alex Sousa,N. Van Remortel,Vsevolod Syvolap,V. Takhistov,J. L. Tastet,Inar Timiryasov,Aaron C. Vincent,Jaehoon Yu +48 more
TL;DR: The existence of nonzero neutrino masses points to the likely existence of multiple Standard Model neutral fermions, referred to as heavy neutral leptons (HNLs) as discussed by the authors .
Journal ArticleDOI
Heavy neutral leptons in effective field theory and the high-luminosity LHC
Giovanna Cottin,Giovanna Cottin,Juan Carlos Helo,Juan Carlos Helo,Martin Hirsch,Arsenii Titov,Zeren Simon Wang +6 more
TL;DR: In this paper, the authors study long-lived HNLs in NRSMEFT, a SM extension with singlet fermions to which they add non-renormalizable operators up to dimension-6.
Neutrinoless Double-Beta Decay: A Roadmap for Matching Theory to Experiment
Vincenzo Cirigliano,Zohreh Davoudi,Wouter Dekens,J. de Vries,Jonathan Engel,Xu Feng,Julia Gehrlein,Michael L. Graesser,L. Gr'af,Heiko Hergert,Luchang Jin,Emanuele Mereghetti,Amy Nicholson,Saori Pastore,Michael J. Ramsey-Musolf,Richard Ruiz,Martin Spinrath,U. van Kolck,Andre Walker-Loud +18 more
TL;DR: In this article , the authors focus on the theoretical aspects of the neutrinoless double-beta decay program and lay out a roadmap for future developments, which is a multi-scale path starting from high-energy models of neutrinolaess double beta decay all the way to the low-energy nuclear many-body problem that needs to be solved to supplement measurements of the decay rate.
Journal ArticleDOI
Lepton collider probes for Majorana neutrino effective interactions
TL;DR: In this paper , the authors exploit the outstanding angular resolution in future lepton colliders to study the sensitivity of forward-backward asymmetries to discover the possible single production of heavy Majorana neutrinos.
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Seesaw lepton masses and muon $$g-2$$ g - 2 from heavy vector-like leptons
TL;DR: In this article, a model for the vector-like lepton to explain the small muon mass by a seesaw mechanism, based on lepton-specific two Higgs doublet models with a local symmetry, was proposed.
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