arXiv 1609.008602016-09-03hep-phhep-ex

低能束缚暗$U(1)_d$

Restrained Dark $U(1)_d$ at Low Energies

F. C. Correia, Svjetlana Fajfer

备注：: 13 pages, 10 figures
发表信息：: Phys. Rev. D 94, 115023 (2016)
DOI：: 10.1103/PhysRevD.94.115023

摘要：

我们研究了一个自发破缺的$U(1)_d$规范对称与μ子特定的暗希格斯。我们的第一个目标是验证新的暗希格斯粒子$ϕ$和暗规范玻色子$V$的存在如何同时面对μ子磁矩和质子电荷半径的异常。其次，通过假设$V$必须衰变为一个电子-正电子对，我们探索了相应的参数空间确定的低能量约束来自$ K \to μX$，电子$(g-2)_e$，$K \to μν_μe^+ e^-$，$K \to μν_μμ^+ μ^-$，$τ\to ν_τμν_μe^+ e^-$。我们专注于$V$质量低于$ \sim 2 m_μ$和$ϕ$质量从几兆电子伏到$250$兆电子伏运行的情况下，与顺序$ \sim\mathcal{O}(10^{-3})$的V-光子混合。在低能弱过程中，我们检验了新的光矢量对K介子衰变和$e^+ e^- \rightarrow μ^+ μ^- e^+ e^-$散射的影响，并讨论了暗Higgs对$e^+ e^- \rightarrow μ^+ μ^- μ^+ μ^- $的影响。最后，我们考虑了V光子混合在$π^0 \to γe^+ e^-$，$η\to γe^+ e^-$，$ρ\to πe^+ e^-$，$K^* \to K e^+ e^-$和$ϕ(1020) \to ηe^+ e^-$衰变中的贡献。

英文摘要：

We investigate a spontaneously broken $U(1)_d$ gauge symmetry with a muon-specific dark Higgs. Our first goal is to verify how the presence of a new dark Higgs, $ϕ$, and a dark gauge boson, $V$, can simultaneously face the anomalies from the muon magnetic moment and the proton charge radius. Secondly, by assuming that $V$ must decay to an electron-positron pair, we explore the corresponding parameter space determined with the low energy constraints coming from $ K \to μX$, electron $(g-2)_e$, $K \to μν_μe^+ e^-$, $K \to μν_μμ^+ μ^-$, $τ\to ν_τμν_μe^+ e^-$. We focus in the scenario where the $V$ mass is below $ \sim 2 m_μ$ and the $ϕ$ mass runs from few MeV till $250$ MeV, with V-photon mixing of the order $ \sim\mathcal{O}(10^{-3})$. Among weak process at low energies, we check the influence of the new light vector on kaon decays as well as on the scattering $e^+ e^- \rightarrow μ^+ μ^- e^+ e^-$ and discuss the impact of the dark Higgs on $e^+ e^- \rightarrow μ^+ μ^- μ^+ μ^- $. Finally, we consider contributions of the V-photon mixing in the decays $π^0 \to γe^+ e^-$, $η\to γe^+ e^-$, $ρ\to πe^+ e^-$, $K^* \to K e^+ e^-$ and $ϕ(1020) \to ηe^+ e^-$.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

摘要：

英文摘要：

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