Sterile neutrinos and neutrinoless double beta decay in effective field theory

Dekens, Wouter; Vries, Jordy de; Fuyuto, Kaori; Mereghetti, Emanuele; Zhou, G. M.

doi:10.1007/jhep06(2020)097

Cited by 84 publications

(101 citation statements)

References 135 publications

(277 reference statements)

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“…1 However, the SMEFT that includes the right-handed (RH) neutrinos N , also known as NSMEFT [31,32], has been explored to a smaller extent; see refs. [33][34][35][36][37][38][39][40][41] for phenomenological works. The off-shell basis of the NSMEFT has only recently been worked out in ref.…”

Section: Jhep09(2020)188mentioning

confidence: 99%

One-loop running of dimension-six Higgs-neutrino operators and implications of a large neutrino dipole moment

Chala

Titov

2020

J. High Energ. Phys.

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We compute the one-loop running of the dimension-six CP-even Higgs operators in the Standard Model effective field theory involving the right-handed component of the would-be Dirac neutrinos. Then, on the basis of naturalness arguments, for some operators we obtain bounds that surpass direct constraints by orders of magnitude. We also discuss the implications of a large Dirac neutrino magnetic dipole moment. In particular, we demonstrate that a neutrino magnetic moment explaining the recent XENON1T excess induces Higgs and Z invisible decays with branching ratios in the range [10−18, 10−12]. These numbers are unfortunately beyond the reach of current and near future facilities.

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Section: Jhep09(2020)188mentioning

confidence: 99%

One-loop running of dimension-six Higgs-neutrino operators and implications of a large neutrino dipole moment

Chala

Titov

2020

J. High Energ. Phys.

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“…The authors of ref. [41] performed a detailed calculation of the contribution of sterile neutrinos to the 0νββ process in an effective field theory framework. In particular the scale of the operator O e11β…”

Section: Jhep07(2020)152mentioning

confidence: 99%

General neutrino interactions with sterile neutrinos in light of coherent neutrino-nucleus scattering and meson invisible decays

Schmidt

2020

J. High Energ. Phys.

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In this work we study the current bounds from the CEνNS process and meson invisible decays on generic neutrino interactions with sterile neutrinos in effective field theories. The interactions between quarks and left-handed SM neutrinos and/or right-handed neutrinos are first described by the low-energy effective field theory (LNEFT) between the electroweak scale and the chiral symmetry breaking scale. We complete the independent operator basis for the LNEFT up to dimension-6 by including both the lepton-number-conserving (LNC) and lepton-number-violating (LNV) operators involving right-handed neutrinos. We translate the bounds on the LNEFT Wilson coefficients from the COHERENT observation and calculate the branching fractions of light meson invisible decays. The bounds on LNEFT are then mapped onto the SM effective field theory with sterile neutrinos (SMNEFT) to constrain new physics above the electroweak scale. We find that the meson invisible decays can provide the only sensitive probe for τ neutrino flavor component and s quark component in the quark-neutrino interactions involving two (one) active neutrinos and for the effective operators without any active neutrino fields. The CEνNS process places the most stringent bound on all other Wilson coefficients. By assuming one dominant Wilson coefficient at a time in SMNEFT and negligible sterile neutrino mass, the most stringent limits on the new physics scale are 2.7–10 TeV from corresponding dipole operator in LNEFT and 0.5–1.5 TeV from neutrino-quark operator in LNEFT.

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“…The corresponding chiral EFT valid at energies below the QCD scale has been considered in Ref. [23] for operators relevant for neutrinoless double beta decay.…”

Section: Introductionmentioning

confidence: 99%

The effective field theory of low scale see-saw at colliders

2020

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We study the Standard Model effective field theory ($$\nu $$νSMEFT) extended with operators involving right-handed neutrinos, focussing on the regime where the right-handed neutrinos decay promptly on collider scales to a photon and a Standard Model neutrino. This scenario arises naturally for right-handed neutrinos with masses of the order $$m_N \sim 0.1 \dots 10\, \,\text {GeV}$$mN∼0.1⋯10GeV. We limit the relevant dimension-six operator coefficients using LEP and LHC searches with photons and missing energy in the final state as well as pion and tau decays. While bounds on new physics contributions are generally in the TeV scale for order one operator coefficients, some coefficients, however, remain very poorly constrained or even entirely evade bounds from current data. Consequently, we identify such weakly constrained scenarios and propose new searches for rare top and tau decays involving photons to probe potential new physics in the $$\nu $$νSMEFT parameter space. Our analysis highlights the importance of performing dedicated searches for new rare tau and top decays.

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Sterile neutrinos and neutrinoless double beta decay in effective field theory

Cited by 84 publications

References 135 publications

One-loop running of dimension-six Higgs-neutrino operators and implications of a large neutrino dipole moment

One-loop running of dimension-six Higgs-neutrino operators and implications of a large neutrino dipole moment

General neutrino interactions with sterile neutrinos in light of coherent neutrino-nucleus scattering and meson invisible decays

The effective field theory of low scale see-saw at colliders

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