从放射化学太阳中微子测量对费米暗物质吸收的约束
Constraints on Fermionic Dark Matter Absorption from Radiochemical Solar-Neutrino Measurements
AI总结：
利用氯和镓的生产率数据，通过贝叶斯似然分析对费米暗物质吸收的额外捕获率进行约束，得出90%上限，并将结果映射到有效尺度参数上。
摘要：
我们重新解释经典的放射化学太阳中微子测量作为'速率计'，用于额外的非负捕获贡献，由费米暗物质吸收引起。利用氯和镓的生产率数据，我们构建了一个贝叶斯似然，考虑太阳中微子捕获率预测中的主要不确定性（太阳通量、振荡参数和捕获截面）。通过展示B16--GS98和B16--AGSS09met太阳模型的结果，明确太阳模型金属度系统误差。从联合(R_{χ,Cl},R_{χ,Ga})分析的1D边缘后验中，我们获得90%上限，主要由氯主导：R_{χ,Cl,90}≈0.388 SNU（B16--GS98）和0.588 SNU（B16--AGSS09met）。在电荷电流V-A基准下，我们将这些约束映射到y≡m_χ^2/(4πΛ^4)的上限上，其中m_χ在^{71}Ga和^{37}Cl捕获阈值以上。在m_χ≈1 MeV时，我们得到y_{90}≈4.88×10^{-49} cm^2（B16--GS98）和7.08×10^{-49} cm^2（B16--AGSS09met）。这些放射化学界限与氙基吸收搜索和对撞机解释互补，通过探测不同的核靶并最小化对能谱重建的依赖。
英文摘要：
We reinterpret classic radiochemical solar-neutrino measurements as ``rate meters'' for additional, non-negative capture-like contributions induced by fermionic dark matter absorption. Using the chlorine and gallium production-rate data, we build a Bayesian likelihood that accounts for the dominant uncertainties in the solar-neutrino capture-rate prediction (solar fluxes, oscillation parameters, and capture cross sections). Solar-model metallicity systematics are made explicit by presenting results for both the B16--GS98 and B16--AGSS09met solar-model realizations. From the 1D marginalized posteriors of the joint $(R_{χ,\mathrm{Cl}},R_{χ,\mathrm{Ga}})$ analysis, we obtain 90\% upper limits on additional capture-like rate contributions, dominated by chlorine: $R_{χ,\mathrm{Cl},90}\simeq 0.388~\mathrm{SNU}$ (B16--GS98) and $0.588~\mathrm{SNU}$ (B16--AGSS09met). In the charged-current V--A benchmark, we map these constraints onto upper bounds on $y\equiv m_χ^2/(4πΛ^4)$ for $m_χ$ above the ${}^{71}$Ga and ${}^{37}$Cl capture thresholds, using a pep-normalized operator mapping anchored to solar-neutrino capture inputs, where $m_χ$ is the dark matter mass and $Λ$ is the effective scale suppressing the charged-current operator. At $m_χ\simeq 1~\mathrm{MeV}$, we find $y_{90}\simeq 4.88\times 10^{-49}~\mathrm{cm}^2$ (B16--GS98) and $7.08\times 10^{-49}~\mathrm{cm}^2$ (B16--AGSS09met). These radiochemical bounds are complementary to xenon-based absorption searches and collider interpretations by probing distinct nuclear targets with minimal reliance on spectral reconstruction.
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