在未来的超级头魅力设施中，能否通过单$π^0$搜索探测到毫卡？

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-12 DOI:arxiv-2409.08129

Yu Zhang

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引用次数: 0

摘要

我们提出了一个通过单$\pi^0$信号在未来的超级头魅力设施（STCF）搜索毫冲粒子的新渠道。我们首次计算了未来STCF上由于毫冲粒子产生以及标准模型可还原/可还原背景而产生的单（mono）$\pi^0$信号事件。通过利用假定每个运行能量为20 ab$^{-1}$的光度（$\sqrt{s}= 2$ GeV、4 GeV和7 GeV），我们分别得出了相应的毫冲上限。在未来的STCF中进行$\sqrt{s}=2GeV的Viamono-$\pi^0$搜索，当毫冲粒子的质量小于约500MeV时，毫冲的上限可以比ArgoNeuT有所提高，但与过去的BEBC实验和新的SENSEI实验的最新推导相比，竞争力并不强。无论如何，单$\pi^0$搜索可能是研究暗物质等不可见粒子的重要补充。

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Can millicharge be probed at future Super Tau Charm Facility via mono-$π^0$ searches?

We propose a new channel to search for millicharged particles at the future Super Tau Charm Facility (STCF) via mono-$\pi^0$ signature. For the first time, we compute the mono-$\pi^0$ signal events at the future STCF due to millicharged particle production, as well as due to standard model irreducible/reducible backgrounds. By utilizing the assumed 20 ab$^{-1}$ luminosity for each running energy with $\sqrt{s}= 2$ GeV, 4 GeV and 7 GeV, we derive the corresponding upper limits on millicharge, respectively. Via mono-$\pi^0$ searches at the future STCF with $\sqrt{s}=2$ GeV, the upper limits on millicharge can be improved than ArgoNeuT when the mass of millicharged particle is less than about 500 MeV, but are not very competitive compared to a latest derivation from a past BEBC experiment and a new SENSEI experiment. Regardless, the mono-$\pi^0$ searches could be an important complement to investigate the invisible particles, such as dark matter.

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arXiv - PHYS - High Energy Physics - Phenomenology

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