Z′ models for the LHCb and g-2 muon anomalies
Z′ models for the LHCb and g-2 muon anomalies
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DOI：
10.1103/physrevd.93.055045
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发表时间：
2016-03-29
影响因子：
5
通讯作者：
Sun, Sichun
中科院分区：
文献类型：
--
作者：
Allanach, Ben;Queiroz, Farinaldo S.;Sun, Sichun
我们重新审视了LHCb合作在B衰变中发现的异常的一类Z‘解释，并表明这种情况受到一系列约束的严格约束：(i) LHC搜索介子共振，（ii） Z’耦合的微扰性；（iii） B-s质量差，（iv）电弱精度数据。通过抑制Z‘与电子和轻夸克的耦合和/或允许Z’衰变到暗物质的宽度，可以找到解决方案。我们还提出了一个简化的框架，其中tev尺度的Z'规范玻色子可以同时与标准轻子和新的重矢量轻子耦合，可以同时适应LHCb异常和μ子g - 2异常。
We revisit a class of Z' explanations of the anomalies found by the LHCb collaboration in B decays, and show that the scenario is tightly constrained by a combination of constraints: (i) LHC searches for dimuon resonances, (ii) perturbativity of the Z' couplings; (iii) the B-s mass difference, and (iv) electroweak precision data. Solutions are found by suppressing the Z' coupling to electrons and to light quarks and/or by allowing for a Z' decay width into dark matter. We also present a simplified framework where a TeV-scale Z' gauge boson that couples to standard leptons as well as to new heavy vectorlike leptons, can simultaneously accommodate the LHCb anomalies and the muon g - 2 anomaly.