Large gauge invariant non-standard neutrino interactions
arXiv:0809.3451 · doi:10.1103/PhysRevD.79.013007
Abstract
Theories beyond the Standard Model must necessarily respect its gauge symmetry. This implies strict constraints on the possible models of non-standard neutrino interactions, which we analyze. The focus is set on the effective low-energy dimension six and eight operators involving four leptons, decomposing them according to all possible tree-level mediators, as a guide for model building. The new couplings are required to have sizeable strength, while processes involving four charged leptons are required to be suppressed. For non-standard interactions in matter, only diagonal tau-neutrino interactions can escape these requirements and can be allowed to result from dimension six operators. Large non-standard neutrino interactions from dimension eight operators alone are phenomenologically allowed in all flavour channels and shown to require at least two new mediator particles. The new couplings must obey general cancellation conditions both at the dimension six and eight levels, which result from expressing the operators obtained from the mediator analysis in terms of a complete basis of operators. We illustrate with one example how to apply this information to model building.
34 pages, 4 figures, 5 tables. Final version in PRD
References in corpus (22)
- Phenomenology with Massive Neutrinos
- Effects of new leptons in Electroweak Precision Data
- Non-Standard Neutrino Interactions with Matter from Physics Beyond the Standard Model
- CP-violation from non-unitary leptonic mixing
- Non-standard neutrino interactions in reactor and superbeam experiments
- A Survey of Lepton Number Violation Via Effective Operators
- Atmospheric neutrinos as probes of neutrino-matter interactions
- Constraining Nonstandard Neutrino-Electron Interactions
- Sensitivity of low energy neutrino experiments to physics beyond the standard model
- Testing non-unitarity of neutrino mixing matrices at neutrino factories
- Neutrino factory optimization for non-standard interactions
- Probing non-standard neutrino interactions with supernova neutrinos
- Discovery reach for non-standard interactions in a neutrino factory
- Effects of non-standard interactions in the MINOS experiment
- CP violation in neutrino oscillations and new physics
- Non-standard interactions using the OPERA experiment
- Can OPERA help in constraining neutrino non-standard interactions?
- Probing Nonstandard Neutrino Physics by Two Identical Detectors with Different Baselines
- Approximative two-flavor framework for neutrino oscillations with nonstandard interactions
- Non-standard neutrino interactions in K^{+}\toπ^{+}ν\barν and D^{+}\toπ^{+}ν\barν decays
- Searching for New Physics in Future Neutrino Factory Experiments
- Constraints on New Physics from Long Baseline Neutrino Oscillation Experiments