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| Format: | Preprint |
| Veröffentlicht: |
2025
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| Online-Zugang: | https://arxiv.org/abs/2504.03145 |
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| _version_ | 1866909976128126976 |
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| author | Chen, Ke-Xin Guo, Yu-Chen Yang, Ji-Chong |
| author_facet | Chen, Ke-Xin Guo, Yu-Chen Yang, Ji-Chong |
| contents | In recent years, with the increasing luminosities of colliders, handling the growing amount of data has become a major challenge for future new physics~(NP) phenomenological research. To improve efficiency, machine learning algorithms have been introduced into the field of high-energy physics. As a machine learning algorithm, the local outlier factor~(LOF), and the nested LOF~(NLOF) are potential tools for NP phenomenological studies. In this work, the possibility of searching for the signals of anomalous quartic gauge couplings~(aQGCs) at muon colliders using the NLOF is investigated. Taking the process $μ^+μ^-\to ν\barνγγ$ as an example, the signals of dimension-8 aQGCs are studied, expected coefficient constraints are presented. The event selection strategy uses unsupervised anomaly scores, with supervised optimization for EFT sensitivity. The NLOF algorithm is shown to outperform the k-means based anomaly detection methods, and a traditional counterpart. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_03145 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Search for anomalous quartic gauge couplings in the process $μ^+μ^-\to \barννγγ$ with a nested local outlier factor Chen, Ke-Xin Guo, Yu-Chen Yang, Ji-Chong High Energy Physics - Phenomenology In recent years, with the increasing luminosities of colliders, handling the growing amount of data has become a major challenge for future new physics~(NP) phenomenological research. To improve efficiency, machine learning algorithms have been introduced into the field of high-energy physics. As a machine learning algorithm, the local outlier factor~(LOF), and the nested LOF~(NLOF) are potential tools for NP phenomenological studies. In this work, the possibility of searching for the signals of anomalous quartic gauge couplings~(aQGCs) at muon colliders using the NLOF is investigated. Taking the process $μ^+μ^-\to ν\barνγγ$ as an example, the signals of dimension-8 aQGCs are studied, expected coefficient constraints are presented. The event selection strategy uses unsupervised anomaly scores, with supervised optimization for EFT sensitivity. The NLOF algorithm is shown to outperform the k-means based anomaly detection methods, and a traditional counterpart. |
| title | Search for anomalous quartic gauge couplings in the process $μ^+μ^-\to \barννγγ$ with a nested local outlier factor |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2504.03145 |