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arXiv 0903.3945hep-ph
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复合非弹性暗物质

Composite Inelastic Dark Matter

Daniele S. M. Alves, Siavosh R. Behbahani, Philip Schuster, Jay G. Wacker

摘要:

DAMA/NaI和DAMA/LIBRA报告的年度调制信号在近11年的时间里一直在6月达到峰值,为暗物质的身份提供了强有力的证据。DAMA的信号强烈表明,暗物质非弹性散射到一个激发态分裂O(100 keV)。我们认为DAMA观测的是复合暗物质粒子的超精细跃迁。作为一个例子,我们考虑一个介子的QCD类部门,建立了组成费米子的自旋-自旋相互作用打破了基态的简并。一个轴向耦合的U(1)规范玻色子与超荷动力学混合诱导介子暗物质的非弹性超精细跃迁,可以解释DAMA信号。

英文摘要:

Peaking consistently in June for nearly eleven years, the annual modulation signal reported by DAMA/NaI and DAMA/LIBRA offers strong evidence for the identity of dark matter. DAMA's signal strongly suggest that dark matter inelastically scatters into an excited state split by O(100 keV). We propose that DAMA is observing hyperfine transitions of a composite dark matter particle. As an example, we consider a meson of a QCD-like sector, built out of constituent fermions whose spin-spin interactions break the degeneracy of the ground state. An axially coupled U(1) gauge boson that mixes kinetically with hypercharge induces inelastic hyperfine transitions of the meson dark matter that can explain the DAMA signal.

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