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arXiv 1707.09786hep-ph
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单圈狄拉克中微子质量和暗物质候选者的系统研究

Systematic Study of One-Loop Dirac Neutrino Masses and Viable Dark Matter Candidates

Chang-Yuan Yao, Gui-Jun Ding

摘要:

我们在树水平和单圈水平上研究了六维有效算符产生小质量中微子的过程,中微子被假定为Dirac粒子。我们找出所有可能的树和一个回路图,导致有限的中微子质量。给出了相应的介质场和中微子质量的预言。通过引入软破缺阿贝尔对称性或有限非阿贝尔对称性,可以禁止中微子质量的低阶贡献。环内的信使可能是暗物质粒子。可能的暗物质候选人和相应的约束参数$α$进行了分析,为每个模型。

英文摘要:

We study the generation of small neutrino masses from the dimension six effective operator at tree level and one-loop level, the neutrinos are assumed to be Dirac particles. We find out all possible tree and one-loop diagrams which lead to finite neutrino masses. The relevant mediator fields and the predictions for neutrino masses are presented. The lower order contributions to neutrino masses can be forbidden by introducing soft breaking abelian symmetry or finite non-abelian symmetry. The messengers inside the loop can be dark matter particles. The possible dark matter candidates and the corresponding constraints on the parameter $α$ are analyzed for each model.

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