One of the major open questions in particle physics is the issue of the neutrino mass ordering (NMO). The current data of the two long-baseline experiments NO$\nu$A and T2K, interpreted in the standard 3-flavor scenario, provide a $\sim 2.4\sigma$ indication in favor of the normal neutrino mass ordering. We show that such an indication is completely washed out if one assumes the existence of neutral-current non-standard interactions (NSI) of the flavor changing type involving the $e-\tau$ flavors. This implies that the claim for a discovery of the NMO will require a careful consideration of the impact of hypothetical NSI.

中文翻译：

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非标准相互作用掩盖了中微子质量排序

粒子物理学中主要的开放性问题之一是中微子质量有序化（NMO）问题。两次长基线实验的当前数据$\nu$在标准3味方案中解释的A和T2K提供了 $〜2.4\sigma$有利于中微子质量正常排序的指示。我们表明，如果假设存在涉及风味变化的风味变化类型的中性电流非标准相互作用（NSI），则这种指示将被完全淘汰。$Ë-\tau$口味。这意味着发现NMO的主张将需要仔细考虑假设的NSI的影响。