Consistent QFT description of non-standard neutrino interactions

The Standard Model Effective Field Theory (SMEFT) provides a systematic and model-independent framework to study neutrino non-standard interactions (NSIs). We study the constraining power of the on-going neutrino oscillation experiments T2K, NOνA, Daya Bay, Double Chooz and RENO in the SMEFT framework. A full consideration of matching is provided between different effective field theories and the renormalization group running at different scales, filling the gap between the low-energy neutrino oscillation experiments and SMEFT at the UV scale. We first illustrate our method with a top- down approach in a simplified scalar leptoquark model, showing more stringent constraints from the neutrino oscillation experiments compared to collider studies. We then provide a bottom-up study on individual dimension-6 SMEFT operators and find NSIs in neutrino experiments already sensitive to new physics at ∼20 TeV when the Wilson coefficients are fixed at unity. We also investigate the correlation among multiple operators at the UV scale and find it could change the constraints on SMEFT operators by several orders of magnitude compared with when only one operator is considered. Furthermore, we find that accelerator and reactor neutrino experiments are sensitive to different SMEFT operators, which highlights the complementarity of the two experiment types.

“…This point was recently presented in ref. [20] and is represented by the arrow connecting the two yellows in our schematic plot figure 1.…”

Section: Left (μ=Mw)mentioning

confidence: 99%

Section: Jhep03(2021)019mentioning

confidence: 99%

Section: Parameterization Of Neutrino Nsismentioning

confidence: 99%

Section: Parameterization Of Neutrino Nsismentioning

confidence: 99%

“…(2.3) and following the matching procedure of ref. [20], we reproduce the following matching formulas originally derived in ref. [20] to the linear order of s,d αβ…”

Section: Jhep03(2021)019mentioning

confidence: 99%

See 3 more Smart Citations

Non-standard interactions in SMEFT confronted with terrestrial neutrino experiments

Tang

et al. 2021

Testing non-standard neutrino interactions in (anti)-electron neutrino disappearance experiments

Chaves

Peres

Holanda

2023

We search for scalar and tensor non-standard interactions using (anti)-electron neutrino disappearance in oscillation data. We found a slight preference for non-zero CP violation, coming from both tensor and scalar interactions. The preference for CP violation is led by Daya Bay low-energy data with a significance that reaches ~ 1.7σ in the global analysis (and ~ 2.1σ when considering only medium baseline reactors data) compared to the standard neutrino oscillation scenario. In some cases, our results indicate that the atmospheric mass squared difference falls outside the range allowed by accelerator long baseline experiments. This suggests the need for further investigation in future work.

DUNE potential as a new physics probe

Cherchiglia,

Santiago

2024

Neutrino experiments, in the next years, aim to determine with precision all the six parameters of the three-neutrino standard paradigm. The complete success of the experimental program is, nevertheless, attached to the non-existence (or at least smallness) of Non-Standard Interactions (NSI). In this work, anticipating the data taken from long-baseline neutrino experiments, we map all the weakly coupled theories that could induce sizable NSI, with the potential to be determined in these experiments, in particular DUNE. Once present constraints from other experiments are taken into account, in particular charged-lepton flavor violation, we find that only models containing leptoquarks (scalar or vector) and/or neutral isosinglet vector bosons are viable. We provide the explicit matching formulas connecting weakly coupled models and NSI, both in propagation and production. Departing from the weakly coupled completion with masses at TeV scale, we also provide a global fit on all NSI for DUNE, finding that NSI smaller than 10−2 cannot be probed even in the best-case scenario.