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arXiv 1607.04029hep-ph
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一个新的无右手中微子的B-L模型

A new B-L model without right-handed neutrinos

Sudhanwa Patra, Werner Rodejohann, Carlos E. Yaguna

摘要:

我们提出并研究了一个新的扩展的标准模型的基础上的B-L规范对称性,可以解释暗物质和中微子的质量。在这个模型中,右手中微子是不存在的,而规范异常被四个手征费米子与分数B-L电荷抵消。在$U(1)_{B-L}$破缺后,这些费米子会自行排列成两个狄拉克粒子,其中最轻的一个会自动稳定下来,扮演暗物质的角色。我们确定的参数空间的区域与所观察到的暗物质密度一致,并表明它们可以通过直接和间接的暗物质检测或对撞机搜索在大型强子对撞机部分探测。另一方面,中微子质量可以用第二类跷跷板机制的一种变体来解释,它涉及到决定暗物质质量的两个标量场之一。

英文摘要:

We propose and study a novel extension of the Standard Model based on the B-L gauge symmetry that can account for dark matter and neutrino masses. In this model, right-handed neutrinos are absent and the gauge anomalies are canceled instead by four chiral fermions with fractional B-L charges. After the breaking of $U(1)_{B-L}$, these fermions arrange themselves into two Dirac particles, the lightest of which is automatically stable and plays the role of the dark matter. We determine the regions of the parameter space consistent with the observed dark matter density and show that they can be partially probed via direct and indirect dark matter detection or collider searches at the LHC. Neutrino masses, on the other hand, can be explained by a variant of the type-II seesaw mechanism involving one of the two scalar fields responsible for the dark matter mass.

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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