论文标题
在Muone实验的深色光子和位移顶点
Dark Photons and Displaced Vertices at the MUonE Experiment
论文作者
论文摘要
Muone是一项提出的实验，旨在通过弹性$μ-E $散射来测量对MUON $ G-2 $的HADRONIC真空极化的贡献。因此，它采用了极高的高分辨率跟踪设备。我们指出，这也使Muone也是一个非常有前途的实验，可以从光线，弱相互互动的新粒子中寻找位移的顶点。我们通过展示其对质量范围内的深色光子的敏感性$ 10〜 \ mathrm {Mev} \ le m_ {a'} \ le 100〜 \ mathrm {mev} $和动力混合参数$ 10^{ - 5} \ 5} \leεe\ leε\ le 10^3} { - e^ - \toμ^{\ pm} \，e^ - \，a'$，其次是$ a'\ to e^+e^ - $。
MUonE is a proposed experiment designed to measure the hadronic vacuum polarization contribution to muon $g-2$ through elastic $μ-e$ scattering. As such it employs an extremely high-resolution tracking apparatus. We point out that this makes MUonE also a very promising experiment to search for displaced vertices from light, weakly-interacting new particles. We demonstrate its potential by showing how it has excellent sensitivity to dark photons in the mass range $10~\mathrm{MeV} \le m_{A'} \le 100~\mathrm{MeV}$ and kinetic mixing parameter $10^{-5} \le εe \le 10^{-3}$, through the process $μ^{\pm}\, e^- \to μ^{\pm}\, e^-\, A'$ followed by $A'\to e^+e^-$.
