Loop bounds on non-standard neutrino interactions

Abstract

We reconsider the bounds on non-standard neutrino interactions with matter which can be derived by constraining the four-charged-lepton operators induced at the loop level. We find that these bounds are model dependent. Naturalness arguments can lead to much stronger constraints than those presented in previous studies, while no completely model-independent bounds can be derived. We will illustrate how large loop-contributions to four-charged-lepton operators are induced within a particular model that realizes gauge invariant non-standard interactions and discuss conditions to avoid these bounds. These considerations mainly affect the $\mathcal{O}(10^{-4})$ constraint on the non-standard coupling strength $\eps_{eμ}$, which is lost. The only model-independent constraints that can be derived are $\mathcal{O}(10^{-1})$. However, significant cancellations are required in order to saturate this bound.

Minor changes, version to be published in JHEP. 17 pages, 3 Axodraw figures, REVTeX4

References in corpus (16)

• Low energy effects of neutrino masses
• Non-Standard Neutrino Interactions with Matter from Physics Beyond the Standard Model
• Non-standard neutrino interactions in reactor and superbeam experiments
• Large gauge invariant non-standard neutrino interactions
• Constraining Nonstandard Neutrino-Electron Interactions
• Neutrino factory optimization for non-standard interactions
• Probing non-standard neutrino interactions with supernova neutrinos
• Probing Non-Standard Neutrino Interactions with Neutrino Factories
• Discovery reach for non-standard interactions in a neutrino factory
• Effects of non-standard interactions in the MINOS experiment
• Non-Standard Interaction Effects at Reactor Neutrino Experiments
• Non-Standard Neutrino Interactions from a Triplet Seesaw Model
• Non-standard interactions using the OPERA experiment
• Probing Nonstandard Neutrino Physics by Two Identical Detectors with Different Baselines
• Can OPERA help in constraining neutrino non-standard interactions?
• Approximative two-flavor framework for neutrino oscillations with nonstandard interactions

Cited by in corpus (1)

• General bounds on non-standard neutrino interactions