Bosonic super–weakly interacting massive particles (WIMPs), including pseudoscalar and vector particles, are dark-matter candidates. To date, many underground experiments searches for super-WIMPs have been performed in the mass range of a few $\mathrm{keV}/c^2$ to $1\mathrm{MeV}/c^2$. All these searches utilize the absorption process of a super-WIMP by a target atom in the detector, which is similar to the photoelectric effect. We consider another process—namely, a Compton-like process. As an example, we compare the cross section of a germanium atom for the absorption process with that of a Compton-like process. Our findings indicate that the cross section for the Compton-like process becomes dominant relative to that for the absorption process for mass above approximately $150\mathrm{keV}/c^2$ for both pseudoscalar and vector super-WIMPs. In particular, the cross section for the Compton-like process for a vector super-WIMP becomes increasingly greater than that for the absorption process by 1 to 2 orders of magnitude in the $400\mathrm{keV}/c^2$ to $1\mathrm{MeV}/c^2$ mass range, respectively. By including the Compton-like process, which has not been used in any other super-WIMP search experiments, the experimental upper limits can be improved.

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玻色子超WIMP搜索实验备注

玻色子超弱相互作用大质量粒子 (WIMP)，包括赝标量粒子和矢量粒子，是暗物质候选者。迄今为止，已经在几个质量范围内进行了许多寻找超级 WIMP 的地下实验。$\mathrm{keV}/C^2$ 到 $1\mathrm{电动汽车}/C^2$. 所有这些搜索都利用了探测器中目标原子对超级 WIMP 的吸收过程，类似于光电效应。我们考虑另一个过程——即类似康普顿的过程。例如，我们将吸收过程中锗原子的横截面与类康普顿过程的横截面进行比较。我们的研究结果表明，类康普顿过程的横截面相对于吸收过程的横截面变得占主导地位。$150\mathrm{keV}/C^2$对于伪标量和矢量超级 WIMP。特别是，矢量超 WIMP 的类康普顿过程的横截面变得越来越大于吸收过程的横截面，在$400\mathrm{keV}/C^2$ 到 $1\mathrm{电动汽车}/C^2$质量范围，分别。通过包括在任何其他超级 WIMP 搜索实验中都没有使用过的类康普顿过程，可以提高实验上限。