arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.01262hep-phastro-ph.CO
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探测暗物质相互作用中的P-和CP破坏

Probing P- and CP-violation in dark matter interactions

Riccardo Catena, Joakim Hagel, Carlos E. Yaguna

摘要:

离散对称性在阐明弱相互作用的结构方面发挥了核心作用,它们可能对暗物质(DM)粒子的相互作用同样至关重要-其性质仍然难以捉摸。在这项工作中,我们表明,在未来的直接检测实验中的信号可以用来测试,在一个模型无关的方式,在DM核相互作用的P-和CP破坏。分析是在最普遍的有效理论为非相对论自旋0 DM核相互作用介导的交换的重粒子。假设一个理想化的氙探测器,我们计算的预期数量的DM信号事件需要拒绝P和CP不变DM核相互作用。对于30 GeV(或更高)的DM质量,这个数字位于大约10到300个DM信号事件之间,这取决于如何对P和CP不变性进行建模。因此,未来的直接检测实验有可能揭示DM相互作用中的P-和CP破坏,从而朝着DM粒子的识别迈出决定性的一步。

英文摘要:

Discrete symmetries played a central role in elucidating the structure of the weak interactions, and they will probably be equally crucial regarding the interactions of the dark matter (DM) particle -- whose nature remains elusive. In this work we show that signals in future direct detection experiments can be used to test, in a model-independent way, for P- and CP-violation in DM-nucleus interactions. The analysis is performed within the most general effective theory for non-relativistic spin-0 DM-nucleus interactions mediated by the exchange of a heavy particle. Assuming an idealised xenon detector, we calculate the expected number of DM signal events required to reject P and CP invariant DM-nucleus interactions. For a DM mass of 30 GeV (or higher), this number lies between about 10 and 300 DM signal events, depending on how P and CP invariance are modeled. Future direct detection experiments, therefore, have the potential to reveal P- and CP-violation in DM interactions, making a decisive step toward the identification of the DM particle.

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