Neutrino non-standard interactions: A status report

P S Bhupal Dev ,Michele Tammaro,K S Babu,Dorival Gonçalves,Sudip Jana,Matheus Hostert,Shirley Weishi Li,Poonam Mehta,Anil Thapa,Yuber F Perez-Gonzalez,André De Gouvêa,Sabya Sachi Chatterjee,Xun-Jie Xu,Bhaskar Dutta,Tao Han,Kevin J Kelly,Jessica Turner,Jordi Salvadó ,Ivan Martínez-Soler ,I Mocioiu ,Ian M Shoemaker ,C Argüelles ,J L Barrow ,Mu‐Chun Chen ,Pedro A N Machado ,Peter B Denton

doi:10.21468/scipostphysproc.2.001

Abstract

This report summarizes the present status of neutrino non-standard interactions (NSI). After a brief overview, several aspects of NSIs are discussed, including connection to neutrino mass models, model-building and phenomenology of large NSI with both light and heavy mediators, NSI phenomenology in both short- and long-baseline neutrino oscillation experiments, neutrino cross-sections, complementarity of NSI with other low- and high-energy experiments, fits with neutrino oscillation and scattering data, DUNE sensitivity to NSI, effective field theory of NSI, as well as the relevance of NSI to dark matter and cosmology. We also discuss the open questions and interesting future directions that can be pursued by the community at large. This report is based on talks and discussions during the Neutrino Theory Network NSI workshop held at Washington University in St.~Louis from May 29-31, 2019

Highlights

Introduction to NonStandard Neutrino Interactions (Denton)non-standard interactions (NSI) provide a general effective field theory (EFT) style framework to quantify new physics in the neutrino sector1
Throughout this document we show that is this picture still very vital with many interesting constraints coming from new experiments, but we show that the picture has evolved beyond this considerably with new models, new phenomenology, and new tests
Considering the results obtained by Coloma et al [19], we present in Fig. 5.2 the best-fit and the {1σ, 2σ, 3σ} regions of the neutrino discovery limit in a Xenon target experiment

Summary

Overview

Given the wide interest in the worldwide neutrino program, it is timely to reassess the state of the art topics related to non-standard neutrino interactions (NSIs). Generation of long–baseline neutrino experiments like DUNE [27] are poised to resolve the sub-dominant effects in oscillation data sensitive to the currently unknown oscillation parameters, namely δCP and sign of ∆m232 All these derivations are within the 3 × 3 neutrino mass and mixing scheme under the assumption that neutrinos interact with matter only through the Standard Model (SM) weak interactions. The effective low energy NSI framework, Eq (1) is useful, as it provides a model independent way of looking for a broad class of new physics scenarios in neutrino oscillation experiments. It is only valid at scales well below electroweak symmetry breaking, and it is important to consider several aspects of the NSI framework, such as theoretical consistency, experimental synergies, and so on. Even though the models described assumes three neutrinos, they may be generalized to incorporate sterile neutrinos as well as NSI

Smallness of the Neutrino Masses

Flavor Mixing and CP Violation

Testing Seesaw

The detector’s ability to reconstruct a ν event

Findings

25 Summary