Muon $(g-2)$ and XENON1T Excess with Boosted Dark Matter in $L_{\mu}-L_{\tau}$ Model
Muon $(g-2)$ and XENON1T Excess with Boosted Dark Matter in $L_{\mu}-L_{\tau}$ Model
复制标题
$L_{mu}-L_{ au}$ 模型中带有增强暗物质的 Muon $(g-2)$ 和 XENON1T 过量
DOI：
10.1016/j.physletb.2021.136577
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发表时间：
2021
影响因子：
5
通讯作者：
Indian Institute of Technology Hyderabad
中科院分区：
文献类型：
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作者：
D. Borah;Manoranjan Dutta;S. Mahapatra;Narendra Sahu Indian Institute of Technology Guwahati;Indian Institute of Technology Hyderabad
在费米实验室的μ子（g−2）测量的第一个结果之后，由于越来越多的证据表明轻子味普适性违反，我们重新审视了标准模型中最广泛研究的无异常扩展之一，即测量L μ−L τ模型，已知它为μ子（g−2）提供了自然解释。我们还将暗物质（DM）的存在纳入该模型，以解释XENON1T合作最近报道的电子反冲过剩。我们表明，负责产生所需μ子（g−2）的中性规范玻色子也可以介导由暗物质湮灭促进的电子和暗费米子之间的相互作用。所需的DM湮灭到暗费米子的速率需要热和非热机制的混合设置来产生DM遗迹密度。来自所有需求的严格约束的参数空间对正在进行的和不久的将来的实验保持敏感，使场景非常具有预测性。
Motivated by the growing evidence for lepton flavour universality violation after the first results from Fermilab's muon (g− 2) measurement, we revisit one of the most widely studied anomaly free extensions of the standard model namely, gauged L μ− L τ model, known to be providing a natural explanation for muon (g− 2). We also incorporate the presence of dark matter (DM) in this model in order to explain the recently reported electron recoil excess by the XENON1T collaboration. We show that the same neutral gauge boson responsible for generating the required muon (g− 2) can also mediate interactions between electron and dark fermions boosted by dark matter annihilation. The required DM annihilation rate into dark fermion require a hybrid setup of thermal and non-thermal mechanisms to generate DM relic density. The tightly constrained parameter space from all requirements remains sensitive to ongoing and near future experiments, keeping the scenario very predictive.