Search for sterile neutrino with light gauge interactions: recasting collider, beam-dump, and neutrino telescope searches

2020/08/28 by Jho, Yongsoo, Kim, Jongkuk, Ko, Pyungwon +1
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2008.12598

Abstract

We investigate features of the sterile neutrinos in the presence of a light gauge boson X^μ that couples to the neutrino sector. The novel bounds on the active-sterile neutrino mixings | U_{ℓ 4} |², especially for tau flavor (l = τ), from various collider and fixed target experiments are explored. Also, taking into account the additional decay channel of the sterile neutrino into a light gauge boson (ν₄ → ν_ℓ e⁺ e^-), we explore and constrain a parameter space for low energy excess in neutrino oscillation experiments.

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