论文标题

搜索两种中性双β衰减中的新物理

Searching for New Physics in Two-Neutrino Double Beta Decay

论文作者

Deppisch, Frank F., Graf, Lukas, Šimkovic, Fedor

论文摘要

由非零中微子肿块和新物理发现的可能性进行的,许多实验搜索中微子双β衰变。在寻找这一假设的核过程的同时,已经可以使用大量的两双双β衰减数据。尽管这些事件被认为并研究主要是中微子双β衰减的背景,但它们也可以用于探测超出标准模型的物理学。在本文中,我们展示了右撇子麻血管的存在将如何影响两次中性双β衰减中即将发出的电子的能量分布和角相关性。因此,我们估计了当前可用的有关右手中微子相互作用的数据所施加的限制,而无需假定其性质。通过这种方式,我们的结果补充了中性betaβ衰减的非观察到的界限,因为它们也限制了狄拉克中微子的异国情调相互作用。我们在存在外来(轴向)矢量电流的情况下对两中性双β衰变进行详细计算,并证明当前的实验搜索可以在现有限制中具有竞争力。

Motivated by non-zero neutrino masses and the possibility of New Physics discovery, a number of experiments search for neutrinoless double beta decay. While hunting for this hypothetical nuclear process, a significant amount of two-neutrino double beta decay data has become available. Although these events are regarded and studied mostly as the background of neutrinoless double beta decay, they can be also used to probe physics beyond the Standard Model. In this paper we show how the presence of right-handed leptonic currents would affect the energy distribution and angular correlation of the outgoing electrons in two-neutrino double beta decay. Consequently, we estimate constraints imposed by currently available data on the existence of right-handed neutrino interactions without having to assume their nature. In this way our results complement the bounds coming from the non-observation of neutrinoless double beta decay as they limit also the exotic interactions of Dirac neutrinos. We perform a detailed calculation of two-neutrino double beta decay under the presence of exotic (axial-)vector currents and we demonstrate that current experimental searches can be competitive to existing limits.

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