Implications of a light “dark Higgs” solution to the g μ − 2 discrepancy
Implications of a light “dark Higgs” solution to the g μ − 2 discrepancy
复制标题
光“暗希格斯”溶液对 g μ − 2 差异的影响
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Cen Zhang
中科院分区：
文献类型：
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作者：
Chien‐Yi Chen;H. Davoudiasl;W. Marciano;Cen Zhang
一个质量为1GeV、介子耦合为O(10-3)的轻标量Φ可以解释标准模型(SM)≲g-2的预测与实验之间3.5GeV的差异。这样的标量可以与希格斯机制在“暗”区域的光残留物相关联。我们建议Φ→L+L在μ→eν$$vec{v}$$Φ，μ-p→νμnΦ(Muon俘获)中进行碰撞狩猎，K±→μ±νΦ衰变作为这种情况的直接探针。在一般情况下，也可能出现潜在的可观察到的µ子电偶极矩≲10-23e cm和违反轻子味道的衰变τ→μ(E)Φ或μ→eΦ。根据某些参数的不同，由于希格斯耦合不对齐，可能导致BR(H→μ+μ-)偏离SM预期。在这里，我们说明了必要的相互作用如何通过弱尺度类矢量轻子来调节，这些轻子通常位于未来大型强子对撞机测量的范围内。
A light scalar Φ with mass ≲1 GeV and muonic coupling O(10-3) would explain the 3.5σ discrepancy between the Standard Model (SM) muon g-2 prediction and experiment. Such a scalar can be associated with a light remnant of the Higgs mechanism in the “dark” sector. We suggest Φ→l+l- bump hunting in μ→eν$$vec{v}$$Φ, μ-p→νμnΦ (muon capture), and K±→μ±νΦ decays as direct probes of this scenario. In a general setup, a potentially observable muon electric dipole moment ≲10-23 e cm and lepton-flavor-violating decays τ→μ(e)Φ or μ→eΦ can also arise. A deviation in BR(H→μ+μ-) from SM expectations, due to Higgs coupling misalignment, can result depending on certain parameters. Here, we illustrate how the requisite interactions can be mediated by weak-scale vector-like leptons that typically lie within the reach of future LHC measurements.