轻子对撞机产生双暗光子的高性能计算研究

IF 0.6 Q4 ASTRONOMY & ASTROPHYSICS Journal of Astronomy and Space Sciences Pub Date : 2022-03-01 DOI:10.5140/jass.2022.39.1.1
Kihong Park, Kyungho Kim, Kihyeon Cho
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引用次数: 0

摘要

人们认为,宇宙中不仅充满了标准模型(SM)物质,也充满了暗物质。暗物质被认为在其构造中起着重要作用。然而,通过从天体物理观测到粒子对撞机实验的各种搜索方法,暗物质的身份仍然未知。由于暗物质的横截面比SM粒子小一千倍,因此暗物质研究需要大量的数据处理。因此,需要高性能计算中的优化和并行化。假设的隐藏扇区中的暗物质被认为与暗光子有关,暗光子携带的力与电磁中的光子相似。在最近的分析中,使用对撞机实验中的暗光子衰变来研究它。在此基础上,我们研究了双暗光子在轻子对撞机上的衰变。信号通道为e+e -→A′A′和e+e -→A′A′γ,暗光子A′衰变为介子。这些信号通道基于暗光子只衰变成重电荷轻子的理论,这可以解释μ子磁动量异常。我们根据实验中暗光子的质量对截面进行了扫描。使用MadGraph5生成基于简化模型的事件。此外,为了获得双暗光子通道的最大期望事件数,利用Delphes和MadAnalysis5对几种质心能量的探测器效率进行了性能比较研究。本研究结果将有助于在轻子对撞机上寻找双暗光子通道。
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A Study of Double Dark Photons Produced by Lepton Colliders using High Performance Computing
The universe is thought to be filled with not only Standard Model (SM) matters but also dark matters. Dark matter is thought to play a major role in its construction. However, the identity of dark matter is as yet unknown, with various search methods from astrophysical observartion to particle collider experiments. Because of the cross-section that is a thousand times smaller than SM particles, dark matter research requires a large amount of data processing. Therefore, optimization and parallelization in High Performance Computing is required. Dark matter in hypothetical hidden sector is though to be connected to dark photons which carries forces similar to photons in electromagnetism. In the recent analysis, it was studied using the decays of a dark photon at collider experiments. Based on this, we studies double dark photon decays at lepton colliders. The signal channels are e+e– → AʹAʹ and e+e– → AʹAʹγ where dark photon Aʹ decays dimuon. These signal channels are based on the theory that dark photons only decay into heavily charged leptons, which can explain the muon magnetic momentum anomaly. We scanned the cross-section according to the dark photon mass in experiments. MadGraph5 was used to generate events based on a simplified model. Additionally, to get the maximum expected number of events for the double dark photon channel, the detector efficiency for several center of mass (CM) energy were studied using Delphes and MadAnalysis5 for performance comparison. The results of this study will contribute to the search for double dark photon channels at lepton colliders.
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来源期刊
Journal of Astronomy and Space Sciences
Journal of Astronomy and Space Sciences ASTRONOMY & ASTROPHYSICS-
CiteScore
1.30
自引率
20.00%
发文量
0
审稿时长
12 weeks
期刊介绍: JASS aims for the promotion of global awareness and understanding of space science and related applications. Unlike other journals that focus either on space science or on space technologies, it intends to bridge the two communities of space science and technologies, by providing opportunities to exchange ideas and viewpoints in a single journal. Topics suitable for publication in JASS include researches in the following fields: space astronomy, solar physics, magnetospheric and ionospheric physics, cosmic ray, space weather, and planetary sciences; space instrumentation, satellite dynamics, geodesy, spacecraft control, and spacecraft navigation. However, the topics covered by JASS are not restricted to those mentioned above as the journal also encourages submission of research results in all other branches related to space science and technologies. Even though JASS was established on the heritage and achievements of the Korean space science community, it is now open to the worldwide community, while maintaining a high standard as a leading international journal. Hence, it solicits papers from the international community with a vision of global collaboration in the fields of space science and technologies.
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