Low energy effects of neutrino masses

By A. Abada, C. Biggio, F. Bonnet, M. B. Gavela, T. Hambye. 2007

324 citations recorded by the source corpus.

While all models of Majorana neutrino masses lead to the same dimension five effective operator, which does not conserve lepton number, the dimension six operators induced at low energies conserve lepton number and differ depending on the high energy model of new physics. We derive the low-energy dimension six operators which are characteristic of generic Seesaw models, in which neutrino masses result from the exchange of heavy fields which may be either fermionic singlets, fermionic triplets or scalar triplets. The resulting operators may lead to effects observable in the near future, if the coefficients of the dimension five and six operators are decoupled along a certain pattern, which turns out to be common to all models. The phenomenological consequences are explored as well, including their contributions to μ→eγ and new bounds on the Yukawa couplings for each model.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/d29a8419ce28c470e6ecc74d8ec82111ad546133

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In Nuclear and High Energy Physics

1. M. Drewes
2. M. Shaposhnikov
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4. A. Ringwald
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6. K. Zurek
7. Alexey Boyarsky
8. Oleg Ruchayskiy

Citations in the corpus

• Lepton Number Violation: Seesaw Models and Their Collider Tests (2017, background): “It should be noted that after integrating out the heavy N field, the marginal operators at d > 5 generated from the Type I Lagrangian are not the same operators generated by integrating the analogous Seesaw partner in the Type II and III scenarios [176, 177].”
• The Phenomenology of Right Handed Neutrinos (2013, background): “They manifest as higher dimensional operators [76], such as the mass term (10).”
• From the Trees to the Forest: A Review of Radiative Neutrino Mass Models (2017, background): “charged scalar boson in the type-II seesaw model, or due to the non-unitarity of the leptonic mixing matrix in type-I and type-III seesaw models when the extra neutral fermions are heavy [433, 434].”
• Charged Lepton Flavour Violation: An Experimental and Theoretical Introduction (2017, background): “As a consequence, CLFV rates can be raised at observable levels for low-scale RH neutrinos [100, 101, 102, 103].”
• Neutrino masses and the CERN LHC: Testing the type II seesaw mechanism (2008, background): “The charged Higgs bosons may mediate tree-level lepton flavo r violation processes, leading to some stringent constraints on the model parameters, see referen ce [25] for a recent comprehensive analysis.”
• Flavor structures of charged fermions and massive neutrinos (2019, background): “To be more specific, the so-called seesaw-induced hierarchy problem means that the mass of the Higgs boson in the SM is considerably sensitive to quantum corrections that result from heavy degrees of freedom at the energy scale ΛSS ΛEW [203, 204, 205].”