Updated constraints on non-standard interactions from global analysis of oscillation data

• Published in: The journal of high energy physics Vol. 2018; no. 8; pp. 1 - 33
• Main Authors: Esteban, Ivan, Gonzalez-Garcia, M. C., Maltoni, Michele, Martinez-Soler, Ivan, Salvado, Jordi
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-08-2018; Springer Nature B.V; SpringerOpen
• Subjects: Beyond Standard Model; Classical and Quantum Gravitation; Coherent scattering; Couplings; Data analysis; Dependence; Elementary Particles; Flavor (particle physics); High energy physics; Leptons; Neutral currents; Neutrino Physics; Neutrinos; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quarks; Regular Article - Theoretical Physics; Relativity Theory; Solar and Atmospheric Neutrinos; String Theory; Neutrino Physics; Beyond Standard Model; Solar and Atmospheric Neutrinos
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP08(2018)180

A
bstract
We quantify our present knowledge of the size and flavor structure of non-standard neutrino interactions which affect the matter background in the evolution of solar, atmospheric, reactor and long-baseline accelerator neutrinos as determined by a global analysis of oscillation data — both alone and in combination with the results on coherent neutrino-nucleus scattering from the COHERENT experiment. We consider general neutral current neutrino interactions with quarks whose lepton-flavor structure is independent of the quark type. We study the dependence of the allowed ranges of non-standard interaction coefficients, the status of the LMA-D solution, and the determination of the oscillation parameters on the relative strength of the non-standard couplings to up and down quarks. Generically we find that the conclusions are robust for a broad spectrum of up-to-down strengths, and we identify and quantify the exceptional cases related to couplings whose effect in neutrino propagation in the Earth or in the Sun is severely suppressed. As a result of the study we provide explicit constraints on the effective couplings which parametrize the non-standard Earth matter potential relevant for long-baseline experiments.