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arXiv 1107.2118hep-ph
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在具有光Z'的模型中直接探测暗物质

Direct detection of dark matter in models with a light Z'

Mads T. Frandsen, Felix Kahlhoefer, Subir Sarkar, Kai Schmidt-Hoberg

摘要:

我们讨论了暗物质通过Z'介质与原子核相互作用的直接探测特征,重点放在暗物质和$Z'$都有几个GeV的质量的情况下。在这种情况下,自然会出现同位旋破坏(即与质子和中子的不同耦合)。特别是,可以将从观察到的DAMA和CoGeNT调制推断出的优选参数区域与来自XENON 100的界限相协调,这需要f_n/f_p =-0.7。此外,Z'介体还可以产生大的自旋相关截面,这可能有助于DAMA信号,而自旋无关截面足以解释CoGeNT信号。

英文摘要:

We discuss the direct detection signatures of dark matter interacting with nuclei via a Z' mediator, focussing on the case where both the dark matter and the $Z'$ have mass of a few GeV. Isospin violation (i.e. different couplings to protons and neutrons) arises naturally in this scenario. In particular it is possible to reconcile the preferred parameter regions inferred from the observed DAMA and CoGeNT modulations with the bounds from XENON100, which requires f_n/f_p = -0.7. Moreover, the Z' mediator can also yield a large spin-dependent cross-section which could contribute to the DAMA signal, while the spin-independent cross-section is adequate to explain the CoGeNT signal.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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