DAMA/LIBRA暗物质探测与其他搜索的兼容性
Compatibility of DAMA/LIBRA dark matter detection with other searches
摘要：
DAMA/NaI和DAMA/LIBRA年度调制数据，这可能被解释为弱相互作用暗物质（WIMPs）的存在，在我们的星系晕的信号，检查从其他实验的零结果。我们使用的能量谱的组合DAMA调制数据在36箱，并包括沟道的影响。在我们的研究中实现了几种统计工具：全局拟合的似然比和WIMP质量和拟合优度（g.o.f.）中的光栅扫描。这些方法允许我们区分首选（全局最佳拟合）和允许（g.o.f.）参数区域很难找到与所有现有数据集一致的WIMP质量和耦合。对于自旋无关（SI）相互作用，最佳拟合DAMA区域被排除到3 $σ$ C.L.，即使考虑到通道效应。然而，对于~8 GeV的WIMP质量，这些区域之外的一些参数仍然产生适度合理的DAMA数据拟合，并与所有90% C.L.负面搜索的上限，当通灵包括在内。对于自旋相关（SD）的相互作用与质子只有耦合，质量低于10 GeV的范围是兼容的DAMA和其他实验，有和没有沟道，当SuperK的间接检测约束包括在内;没有SuperK的约束，质量高达~20 GeV是兼容的。对于SD中子耦合，我们发现没有参数兼容的所有实验。混合SD耦合检查：例如~8 GeV质量WIMP与a_n = +/- a_p被发现是符合所有的实验.简而言之，SI和SD相互作用在低质量下都存在幸存区域;如果放宽间接检测限，一些高质量的SD仅质子耦合也会幸存。
英文摘要：
The DAMA/NaI and DAMA/LIBRA annual modulation data, which may be interpreted as a signal for the existence of weakly interacting dark matter (WIMPs) in our galactic halo, are examined in light of null results from other experiments. We use the energy spectrum of the combined DAMA modulation data given in 36 bins, and include the effect of channeling. Several statistical tools are implemented in our study: likelihood ratio with a global fit and with raster scans in the WIMP mass and goodness-of-fit (g.o.f.). These approaches allow us to differentiate between the preferred (global best fit) and allowed (g.o.f.) parameter regions. It is hard to find WIMP masses and couplings consistent with all existing data sets. For spin-independent (SI) interactions, the best fit DAMA regions are ruled out to the 3$σ$ C.L., even with channeling taken into account. However, for WIMP masses of ~8 GeV some parameters outside these regions still yield a moderately reasonable fit to the DAMA data and are compatible with all 90% C.L. upper limits from negative searches, when channeling is included. For spin-dependent (SD) interactions with proton-only couplings, a range of masses below 10 GeV is compatible with DAMA and other experiments, with and without channeling, when SuperK indirect detection constraints are included; without the SuperK constraints, masses as high as ~20 GeV are compatible. For SD neutron-only couplings we find no parameters compatible with all the experiments. Mixed SD couplings are examined: e.g. ~8 GeV mass WIMPs with a_n = +/- a_p are found to be consistent with all experiments. In short, there are surviving regions at low mass for both SI and SD interactions; if indirect detection limits are relaxed, some SD proton-only couplings at high masses also survive.
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