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arXiv 1705.03074hep-ph
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可见中微子衰变在光的出现和消失长基线实验

Visible neutrino decay in the light of appearance and disappearance long baseline experiments

Alberto M. Gago, Ricardo A. Gomes, Abner L. G. Gomes, Joel Jones-Perez, Orlando L. G. Peres

摘要:

我们研究了MINOS和T2 K实验中由Majorons与中微子的非对角耦合引起的中微子衰变的限制。作为新颖性,在典型的不可见衰变处方之上,我们添加了可见衰变的贡献,其中可以观察到最终产品。这种新的效应取决于中微子-马约子耦合的性质,它可以是标量或赝标量类型。结合MINOS的消失数据和T2 K的消失和出现数据,在正常序下,我们约束了最重中微子的衰变参数$α\equiv E\,Γ$,其中$E$和$Γ$分别是中微子的能量和宽度.我们发现,当考虑外观数据内的可见衰变时,可以将当前中微子长基线约束提高到$α< \mathcal{O}(10^{-5})$ eV $^2$,在90\%C. L.,对于这两种耦合,这是更好的一个数量级相比,以前的界限。

英文摘要:

We investigate the present constraints from MINOS and T2K experiments for the neutrino decay scenario induced by non-diagonal couplings of Majorons to neutrinos. As novelty, on top of the typical invisible decay prescription, we add the contribution of visible decay, where final products can be observed. This new effect depends on the nature of the neutrino - Majoron coupling, which can be of scalar or pseudoscalar type. Using the combination of disappearance data from MINOS and disappearance and appearance data from T2K, for normal ordering, we constrain the decay parameter $α\equiv E\,Γ$ for the heaviest neutrino, where $E$ and $Γ$ are the neutrino energy and width, respectively. We find that when considering visible decay within appearance data, one can improve current neutrino long-baseline constraints up to $α< \mathcal{O}(10^{-5})$ eV$^2$, at 90\% C.L., for both kinds of couplings, which is better by one order of magnitude compared to previous bounds.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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