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Suppressed flavor violation in lepton flavored dark matter from an extra dimension

机译:阻碍勒斯顿风味违规来自额外维度的暗物质

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Phenomenological studies of flavored dark matter (FDM) models often have to assume a near-diagonal flavor structure in the coupling matrix in order to remain consistent with bounds from flavor violating processes. In this paper we show that for lepton FDM, such a structure can naturally arise from an extra dimensional setup. The extra dimension is taken to be flat, with the dark matter and mediator fields confined to a brane on one end of the extra dimension, and the Higgs field to a brane on the other end. The Standard Model fermion and gauge fields are the zero modes of corresponding bulk fields with appropriate boundary conditions. Global flavor symmetries exist in the bulk and on the FDM brane, while they are broken on the Higgs brane. Flavor violating processes arise due to the misalignment of bases for which the interactions on the two branes are diagonalized, and their size can be controlled by a choice of the lepton profiles along the extra dimension. By studying the parameter space for the model, we show that when relic abundance and indirect detection constraints are satisfied, the rates for flavor violating processes such as μ → e γ remain far below the experimental limits.
机译:调味暗物质(FDM)模型的现象学研究通常必须在偶联基质中呈现近对角线调味结构,以便保持与来自风味违规过程的界限保持一致。在本文中,我们表明,对于Lepton FDM,这种结构可以自然地从额外的尺寸设置中出现。额外的尺寸是平坦的,用暗物质和介质局限于额外尺寸的一端的一端,以及另一端的HIGGS字段。标准模型FERMION和GAUGE字段是具有适当边界条件的相应批量字段的零模式。全局风味对称存在于散装中和FDM Brane上,而它们在Higgs Brane上被打破。由于两个布兰内斯对角度的相互作用而产生的血迹违规流程出现,并且它们的尺寸可以通过沿额外尺寸的lepton配置文件来控制。通过研究模型的参数空间,我们表明,当满足遗物丰度和间接检测约束时,诸如μ→Eγ的风味违反过程的速率仍远低于实验限制。

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