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arXiv 1006.0972astro-ph.COhep-exhep-ph
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与CoGeNT和DAMA比较的XENON10/100暗物质约束:检验Leff依赖性

XENON10/100 dark matter constraints in comparison with CoGeNT and DAMA: examining the Leff dependence

Christopher Savage, Graciela Gelmini, Paolo Gondolo, Katherine Freese

摘要:

我们认为DAMA/LIBRA,CoGeNT,XENON 10和XENON 100的自旋无关(SI)的暗物质弱相互作用大质量粒子(WIMPs)的结果的兼容性,特别是在低质量(~ 10 GeV),假设一个标准的暗物质晕。氙边界取决于闪烁效率因子Leff,其中存在相当大的不确定性。因此,我们考虑各种外推的Leff在低能量。与Leff测量,我们认为,XENON 100的结果被发现是不敏感的低能量外推。我们发现最强的边界是从XENON 10,而不是XENON 100,由于较低的能量阈值。对于合理选择的Leff和SI弹性散射的情况下,氙10是不兼容的DAMA/LIBRA 3 $σ$区域,并严重限制了7-12 GeV的WIMP质量区的利益CoGeNT合作公布。

英文摘要:

We consider the compatibility of DAMA/LIBRA, CoGeNT, XENON10 and XENON100 results for spin-independent (SI) dark matter Weakly Interacting Massive Particles (WIMPs), particularly at low masses (~ 10 GeV), assuming a standard dark matter halo. The XENON bounds depend on the scintillation efficiency factor Leff for which there is considerable uncertainty. Thus we consider various extrapolations for Leff at low energy. With the Leff measurements we consider, XENON100 results are found to be insensitive to the low energy extrapolation. We find the strongest bounds are from XENON10, rather than XENON100, due to the lower energy threshold. For reasonable choices of Leff and for the case of SI elastic scattering, XENON10 is incompatible with the DAMA/LIBRA 3$σ$ region and severely constrains the 7-12 GeV WIMP mass region of interest published by the CoGeNT collaboration.

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