论文标题

从额外的维度抑制了Lepton风味的暗物质中的侵犯风味

Suppressed flavor violation in Lepton Flavored Dark Matter from an extra dimension

论文作者

Desai, Niral, Kilic, Can, Yang, Yuan-Pao, Youn, Taewook

论文摘要

风味暗物质(FDM)模型的现象学研究通常必须在耦合矩阵中采用接近二元的风味结构,以保持与违反风味过程的范围一致。在本文中,我们表明,对于Lepton FDM,这种结构自然可以由额外的尺寸设置产生。额外的尺寸被认为是平坦的,深色物质和中介场局限于额外尺寸的一端的勃雷恩,而希格斯(Higgs)的田地则位于另一端。标准模型费米昂和量规场是具有适当边界条件的相应散装场的零模式。全球风味对称性存在于散装和FDM棕褐色,而它们在希格斯(Higgs Brane)上被打破。违反风味的过程是由于底座上的相互作用对对角线化的底座的未对准而产生,并且可以通过选择额外尺寸的Lepton概况来控制它们的大小。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,违反风味的过程(例如$μ\ toeγ$)的速率仍远低于实验限制。

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 $μ\to eγ$ remain far below the experimental limits.

扫码加入交流群

加入微信交流群

微信交流群二维码

扫码加入学术交流群,获取更多资源