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首页> 外文期刊>Physical review, D >Proton-philic spin-dependent inelastic dark matter as a viable explanation of DAMA/LIBRA-phase2
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Proton-philic spin-dependent inelastic dark matter as a viable explanation of DAMA/LIBRA-phase2

机译：质子自旋相关的非弹性暗物质作为DAMA / LIBRA-phase2的可行解释

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We show that the weakly interacting massive particle scenario of proton-philic spin-dependent inelastic dark matter (pSIDM) can still provide a viable explanation of the observed DAMA modulation amplitude in compliance with the constraints from other experiments after the release of the DAMA/LIBRA-phase2 data and including the recent bound from COSINE–100, that uses the same N a I target of DAMA. The pSIDM scenario provided a viable explanation of DAMA/LIBRA-phase1 both for a Maxwellian WIMP velocity distribution and in a halo–independent approach. At variance with DAMA/LIBRA-phase1, for which the modulation amplitudes showed an isolated maximum at low energy, the DAMA/LIBRA-phase2 spectrum is compatible to a monotonically decreasing one. Moreover, due to its lower threshold, it is sensitive to WIMP–iodine interactions at low WIMP masses. Due to the combination of these two effects pSIDM can now explain the yearly modulation observed by DAMA/LIBRA only when the WIMP velocity distribution departs from a standard Maxwellian. In this case the WIMP mass m χ and mass splitting δ fall in the approximate ranges 7?? GeV ? m χ ? 17 ? ? GeV and 18 ? ? keV ? δ ? 29 ? ? keV . The recent COSINE–100 bound is naturally evaded in the pSDIM scenario due to its large expected modulation fractions.
机译：我们表明，质子自旋依赖非弹性暗物质（pSIDM）的弱相互作用的大质量粒子情形仍然可以为观测到的DAMA调制振幅提供可行的解释，这与DAMA / LIBRA释放后来自其他实验的约束一致-phase2数据，包括最近的COSINE-100范围，该范围使用DAMA的相同目标。 pSIDM场景为Maxwellian WIMP速度分布和独立于光晕的方法提供了DAMA / LIBRA-phase1的可行解释。与DAMA / LIBRA-phase1（在低能量下调制幅度显示出一个孤立的最大值）不同，DAMA / LIBRA-phase2频谱与单调递减的频谱兼容。此外，由于其阈值较低，因此对低WIMP质量的WIMP-碘相互作用很敏感。由于这两种作用的结合，仅当WIMP速度分布偏离标准Maxwellian时，pSIDM现在才能解释DAMA / LIBRA观测到的年度调制。在这种情况下，WIMP质量mχ和质量分裂δ落在大约7≤α范围内。 GeV？米χ？ 17？ ？ GeV和18？ ？ keV？ δ？ 29？ ？ keV由于pSDIM场景中预期的调制比例很大，因此自然会避开最近的COSINE-100范围。

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