TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysCore.8.4.091
TI  - Search for anomalous quartic gauge couplings in the process $\mu^+\mu^-\to \bar{\nu}\nu\gamma\gamma$ with a nested local outlier factor
PY  - 2025/12/11
UR  - https://scipost.org/SciPostPhysCore.8.4.091
JF  - SciPost Physics Core
JA  - SciPost Phys. Core
VL  - 8
IS  - 4
SP  - 091
A1  - Chen, Ke-Xin
AU  - Guo, Yu-Chen
AU  - Yang, Ji-Chong
AB  - 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 $\mu^+\mu^-\to \nu\bar{\nu}\gamma\gamma$ 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.
ER  -

@Article{10.21468/SciPostPhysCore.8.4.091,
	title={{Search for anomalous quartic gauge couplings in the process $\mu^+\mu^-\to \bar{\nu}\nu\gamma\gamma$ with a nested local outlier factor}},
	author={Ke-Xin Chen and Yu-Chen Guo and Ji-Chong Yang},
	journal={SciPost Phys. Core},
	volume={8},
	pages={091},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhysCore.8.4.091},
	url={https://scipost.org/10.21468/SciPostPhysCore.8.4.091},
}