One-loop running of dimension-six Higgs-neutrino operators and implications of a large neutrino dipole moment
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Beyond Standard ModelHiggs PhysicsNeutrino Physics
Chala, M., & Titov, A. (2020). One-loop running of dimension-six Higgs-neutrino operators and implications of a large neutrino dipole moment. Journal of High Energy Physics, 2020(9), 1-24. [https://doi.org/10.1007/JHEP09(2020)188]
SponsorshipSpanish MINECO under the Juan de la Cierva programme; Spanish Government FPA2016-78220-C3-3-P; Junta de Andalucía FQM 101 A-FQM-211-UGR18
We compute the one-loop running of the dimension-six CP-even Higgs operators in the Standard Model e ective eld 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.