Can millicharge be probed at future Super Tau Charm Facility via mono-π0 searches?

IF 4.3 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS Physics Letters B Pub Date : 2024-09-11 DOI:10.1016/j.physletb.2024.139008

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Abstract

We propose a new channel to search for millicharged particles at the future Super Tau Charm Facility (STCF) via mono- $π^{0}$ signature. For the first time, we compute the mono- $π^{0}$ 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- $π^{0}$ 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- $π^{0}$ searches could be an important complement to investigate the invisible particles, such as dark matter.

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在未来的超级头魅力设施中，能否通过单π0搜索探测到毫卡？

我们提出了一种通过单π0信号在未来的超级头魅力设施（STCF）寻找千冲粒子的新渠道。我们首次计算了未来超级头魅力设施中由于千冲粒子产生以及标准模型不可还原/可还原背景而产生的单π0信号事件。通过利用s=2 GeV、4 GeV和7 GeV的每种运行能量的假定20 ab-1光度，我们分别得出了相应的毫冲上限。通过在未来的STCF进行s=2 GeV的单π0搜索，当毫冲粒子的质量小于约500 MeV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π0搜索可以成为研究暗物质等不可见粒子的重要补充。

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来源期刊

Physics Letters B 物理-物理：综合

CiteScore

9.10

自引率

6.80%

发文量

647

审稿时长

3 months

期刊介绍： Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.