Can WIMP spin dependent couplings explain DAMA data, in light of null results from other experiments?
Can WIMP spin dependent couplings explain DAMA data, in light of null results from other experiments?
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鉴于其他实验的无效结果，WIMP 自旋相关耦合能否解释 DAMA 数据？
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
K. Freese
中科院分区：
文献类型：
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作者：
C. Savage;P. Gondolo;K. Freese
我们研究DAMA暗物质实验发现的年度调制是否可以用弱相互作用大质量粒子（WIMPs）来解释，根据其他实验的新零结果。CDMS II已经排除了大多数WIMP-核自旋独立耦合作为DAMA数据的解释。因此，我们在这里专注于自旋依赖（轴向矢量; SD）耦合的WIMP核。我们扩大了以前的工作，（i）考虑耦合到质子和中子的一般情况下，（ii）纳入所有现有的实验的界限。我们注意到令人惊讶的事实，CMDS II的地方最强的边界上的WIMP-中子截面，并表明SD WIMP-中子散射单独被排除在外。我们还表明，SD WIMP质子散射仅允许WIMP质量在5-13 GeV的范围内。对于一般的情况下，耦合到质子和中子，我们发现，对于WIMP质量高于13 GeV和低于5 GeV，有没有区域的参数空间是兼容的DAMA和所有其他实验。在（5-13）GeV范围内，我们找到了参数空间的可接受区域，包括WIMP-中子耦合与WIMP-质子耦合相当的区域。
We examine whether the annual modulation found by the DAMA dark matter experiment can be explained by Weakly Interacting Massive Particles (WIMPs), in light of new null results from other experiments. CDMS II has already ruled out most WIMP-nucleus spin-independent couplings as an explanation for DAMA data. Hence we here focus on spin-dependent (axial vector; SD) couplings of WIMPs to nuclei. We expand upon previous work by (i) considering the general case of coupling to both protons and neutrons and (ii) incorporating bounds from all existing experiments. We note the surprising fact that CMDS II places one of the strongest bounds on the WIMP-neutron cross section, and show that SD WIMP-neutron scattering alone is excluded. We also show that SD WIMP-proton scattering alone is allowed only for WIMP masses in the 5-13 GeV range. For the general case of coupling to both protons and neutrons, we find that, for WIMP masses above 13 GeV and below 5 GeV, there is no region of parameter space that is compatible with DAMA and all other experiments. In the range (5-13) GeV, we find acceptable regions of parameter space, including ones in which the WIMP-neutron coupling is comparable to the WIMP-proton coupling.