Abstract
Many scenarios of new physics predict the existence of neutrino Non-Standard Interactions, new vector contact interactions between neutrinos and first generation fermions beyond the Standard Model. We obtain model-independent constraints on the Standard Model Effective Field Theory at high energies from bounds on neutrino non-standard interactions derived at low energies. Our analysis explores a large set of new physics scenarios and includes full one-loop running effects below and above the electroweak scale. Our results show that neutrino non-standard interactions already push the scale of new physics beyond the TeV. We also conclude that bounds derived by other experimental probes, in particular by low-energy precision measurements and by charged lepton flavor violation searches, are generally more stringent. Our study constitutes a first step towards the systematization of phenomenological analyses to evaluate the impact of neutrino Non-Standard Interactions for new physics scenarios at high energies.
Highlights
The Standard Model (SM) provides a successful description of a vast amount of particle physics phenomena
In order to explore a substantial region of the huge Standard Model effective field theory (SMEFT) parameter space, we have considered a large number of SMEFT operators and applied the approach discussed in Sec
Due to the absence of direct experimental evidence of their existence, the new physics (NP) degrees of freedom might lie at very high energies, clearly above the electroweak scale
Summary
The Standard Model (SM) provides a successful description of a vast amount of particle physics phenomena. The link between neutrino NSI and wellestablished EFTs, such as the LEFT and the SMEFT, allows one to study the phenomenology of a wide class of new physics (NP) scenarios in a model-independent way and confront results coming from a large diversity of experiments. This approach has been adopted in many recent works, deriving bounds from low-energy scattering [10] or reactor [11] experiments, or studying the interplay with searches for lepton flavor violating processes [12].
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