Sterile neutrinos and right-handed currents in KATRIN
Sterile neutrinos and right-handed currents in KATRIN
复制标题
KATRIN 中的惰性中微子和右手电流
DOI：
10.1007/jhep07(2014)081
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发表时间：
2014
影响因子：
5.4
通讯作者：
W. Rodejohann
中科院分区：
文献类型：
--
作者：
J. Barry;J. Heeck;W. Rodejohann
摘要库里图实验允许以几乎与模型无关的方式基于运动学进行中微子质量测量。未来基于氚的 KATRIN 类实验可以对质量低于 18 keV 的轻惰性中微子敏感，这些中微子是热暗物质的主要候选者之一。在这里，我们考虑左右对称扩展中的此类 keV 中微子，即与右手电流耦合，即使对于小型活性惰性混合，也可以增强对 β 衰变的贡献，而不会违反天体物理 X 射线约束。修改后的光谱形状原则上与标准贡献不同——特别是对于低于 9 keV 的惰性中微子质量，这可能会导致明显的峰值。我们比较了大型强子对撞机和无中微子双贝塔衰变约束的敏感性。
A bstractKurie-plot experiments allow for neutrino-mass measurements based on kinematics in an almost model-independent manner. A future tritium-based KATRIN-like experiment can be sensitive to light sterile neutrinos with masses below 18 keV, which are among the prime candidates for warm dark matter. Here we consider such keV neutrinos in left-right symmetric extensions, i.e. coupled to right-handed currents, which allow for an enhanced contribution to beta decay even for small active-sterile mixing, without violating astrophysical X-ray constraints. The modified spectral shape is in principle distinguishable from the standard contribution — especially for sterile neutrino masses below 9 keV, which can lead to a distinct peak. We compare the sensitivity to constraints from the LHC and neutrinoless double beta decay.