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arXiv 1609.01762hep-ph
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可极化暗粒子上的闪耀光

Shining Light on Polarizable Dark Particles

Sylvain Fichet

摘要:

本文研究了在光的自相互作用中寻找自共轭可极化粒子的可能性。我们首先观察到,极化率可以从介体状态的交换中产生,也可以作为粒子内部结构的结果。为了验证第二种可能性,我们计算了中性玻色开弦的极化率,发现它只能用8维算符来描述。针对自旋为0的情形,计算了由6维和8维极化率算符引起的光-光散射振幅。在大型强子对撞机上进行质子标记的独家双光子生产的模拟,我们发现,可极化暗粒子的印记可以潜在地检测到在5 $σ$意义的质量和截止达到的值以上的TeV规模,为$\sqrt{s}=$ 13 TeV和300 fb $^{-1}$的积分亮度。如果可极化暗粒子是稳定的,它可以是暗物质的候选者,在这种情况下,我们认为这种排他性的双光子搜索可能补充现有的LHC搜索可极化暗物质。

英文摘要:

We investigate the possibilities of searching for a self-conjugate polarizable particle in the self-interactions of light. We first observe that polarizability can arise either from the exchange of mediator states or as a consequence of the inner structure of the particle. To exemplify this second possibility we calculate the polarizability of a neutral bosonic open string, and find it is described only by dimension-8 operators. Focussing on the spin-0 case, we calculate the light-by-light scattering amplitudes induced by the dimension-6 and 8 polarizability operators. Performing a simulation of exclusive diphoton production with proton tagging at the LHC, we find that the imprint of the polarizable dark particle can be potentially detected at 5$σ$ significance for mass and cutoff reaching values above the TeV scale, for $\sqrt{s}=$13~TeV and 300 fb$^{-1}$ of integrated luminosity. If the polarizable dark particle is stable, it can be a dark matter candidate, in which case we argue this exclusive diphoton search may complement the existing LHC searches for polarizable dark matter.

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