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Status of light sterile neutrino searches
Progress in Particle and Nuclear Physics ( IF 9.6 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.ppnp.2019.103736
Sebastian Böser , Christian Buck , Carlo Giunti , Julien Lesgourgues , Livia Ludhova , Susanne Mertens , Anne Schukraft , Michael Wurm

A number of anomalous results in short-baseline oscillation may hint at the existence of one or more light sterile neutrino states in the eV mass range and have triggered a wave of new experimental efforts to search for a definite signature of oscillations between active and sterile neutrino states. The present paper aims to provide a comprehensive review on the status of light sterile neutrino searches in mid-2019: we discuss not only the basic experimental approaches and sensitivities of reactor, source, atmospheric, and accelerator neutrino oscillation experiments but also the complementary bounds arising from direct neutrino mass experiments and cosmological observations. Moreover, we review current results from global oscillation analyses that include the constraints set by running reactor and atmospheric neutrino experiments. They permit to set tighter bounds on the active-sterile oscillation parameters but as yet are not able to provide a definite conclusion on the existence of eV-scale sterile neutrinos.

中文翻译:

轻质无菌中微子搜索现状

短基线振荡中的许多异常结果可能暗示在 eV 质量范围内存在一个或多个轻惰性中微子态,并引发了一波新的实验工作,以寻找活跃中微子和惰性中微子之间振荡的明确特征状态。本文旨在全面回顾 2019 年中期轻惰性中微子搜索的状态:我们不仅讨论反应堆、源、大气和加速器中微子振荡实验的基本实验方法和敏感性,还讨论了产生的互补边界来自直接中微子质量实验和宇宙​​学观察。此外,我们回顾了全球振荡分析的当前结果,其中包括运行反应堆和大气中微子实验设置的约束。
更新日期:2020-03-01
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