论文标题
轻型暗物质检测和中微子地板：异常$（G-2）_ $的作用
Light Dark Matter Detection and Neutrino Floor: Role of Anomalous $(g-2)_μ$
论文作者
论文摘要
在这项工作中，我们探讨了暗物质（DM）遗物密度和直接检测约束对GEV量表DM的影响，在最近的异常muon磁矩$（g-2）_μ$测量的背景下； SM的$5.1σ$差异。在$ u（1）中，_ {l_μ-l_τ} $方案额外的$ z'$ boson修改了$（g-2）_ $ $ value易于解释差异，这限制了$ z^{\ prime} $质量在$ 20-200 $ 〜emev的范围内。在$ z^{\ prime} $质量上施加的边界以及量规耦合，限制$ u（1）_ {l_μ-l_τ} $模型中中微子地板的可能增强。对于$（g-2）_ $允许的参数空间内的较轻的$ z^{\ prime} $增强了中微子地板，而对于较重的$ z^{\ prime} $，增强功能较小。 GEV量表Fermionic DM的$（g-2）_ $约束使S通道共振歼灭无关紧要，重点放在T通道的依赖上，以创建观察到的DM遗物。尽管通过相对较大的耦合提供了T通道歼灭可以解释测得的遗物密度，但它增加了GEV DM的直接检测横截面。因此，除了一个重$ z^{\ prime} $的小参数区域外，Super-GEV（质量为$ 1-10 $ 〜GEV）DM几乎被排除在外，而Sub-Gev（质量为0.1-1 $ 〜GEV）DM检测可能性仍然很亮，而Heavie $ z^prime pmire prime的可能性更高。在我们的分析中，我们发现与间接检测测量值相比，直接检测约束对GEV DM的影响更大。
In this work, we explore the impact of dark matter (DM) relic density and direct detection constraints on a GeV scale DM in the context of recent anomalous muon magnetic moment $(g-2)_μ$ measurement; a $ 5.1 σ$ discrepancy with the SM. In $U(1)_{L_μ-L_τ}$ scenario the additional $Z'$ boson modifies the $(g-2)_μ$ value readily explaining the discrepancy, which restricts the $Z^{\prime}$ mass in the range of $20-200$~MeV. Bounds imposed on the $Z^{\prime}$ mass along with the gauge coupling, limit possible enhancement of the neutrino floor in an $U(1)_{L_μ-L_τ}$ model. Neutrino floor is enhanced for a lighter $Z^{\prime}$ inside the $(g-2)_μ$ allowed parameter space, whereas for a heavier $Z^{\prime}$, enhancement is less significant. The $(g-2)_μ$ constraint for the GeV scale Fermionic DM makes s-channel resonant annihilation insignificant, placing emphasis on a t-channel reliance to create the observed DM relic. Although a t-channel annihilation aided by relatively large couplings can explain the measured relic density, it increases the direct detection cross-section of the GeV DM. Consequently, super-GeV (with mass $1-10$~GeV) DM almost gets ruled out except for a small parameter region with heavier $Z^{\prime}$, whereas sub-GeV (with mass $0.1-1$~GeV) DM detection possibility remains bright with more detection possibility for heavier $Z^{\prime}$. In our analysis, we have discovered that direct detection constraints have a greater impact on the GeV DM compared to indirect detection measurements.
