Probing the ALP--Photon--Dark Photon Interaction through the Mono-Photon plus Missing-Energy Signature at a Muon Collider
Abstract
The dark axion portal provides a well-motivated framework for new physics beyond the Standard Model (SM), in which an axion-like particle (ALP) couples simultaneously to a photon and a dark photon, leading to distinctive collider signatures. In this work, we investigate the sensitivity to the a--γ--γ' interaction via the mono-photon channel arising from μ+μ− → a γ' with a → γγ' at the 1.5 TeV muon collider with an integrated luminosity of ℒ=500 fb−1 for the polarized and unpolarized beam configurations, P(μ+,μ-)=(−100%,+100%) and P(μ+,μ-)=(0,0), using detector-level simulation. The signal is characterized by a single energetic photon accompanied by missing energy as the dark photons escape detection. The projected sensitivity reaches the 𝒪(10−5) GeV−1 level for ALP masses in the range 1 GeV≤ ma≤1200 GeV for P(μ+,μ-)=(−100%,+100%), while for P(μ+,μ-)=(0,0) the projected sensitivity reaches the 𝒪(10−4) GeV−1 level for the same ALP mass range. These results demonstrate that the mono-photon signature at a muon collider provides a sensitive probe of the a--γ--γ' interaction over a wide mass range.
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BibTeX
@misc{yue2026probing,
title = {{Probing the ALP--Photon--Dark Photon Interaction through the Mono-Photon plus Missing-Energy Signature at a Muon Collider}},
author = {Chong-Xing Yue and Yang-Yang Bu and Xin-Yang Li and Feng-Xia Tang},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2608.15656},
eprint = {2608.15656},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.15656},
}
RIS
TY - UNPB
TI - Probing the ALP--Photon--Dark Photon Interaction through the Mono-Photon plus Missing-Energy Signature at a Muon Collider
AU - Chong-Xing Yue
AU - Yang-Yang Bu
AU - Xin-Yang Li
AU - Feng-Xia Tang
PY - 2026
DA - 2026/09/17
PB - arXiv
DO - 10.48550/arxiv.2608.15656
UR - https://arxiv.org/abs/2608.15656
AB - The dark axion portal provides a well-motivated framework for new physics beyond the Standard Model (SM), in which an axion-like particle (ALP) couples simultaneously to a photon and a dark photon, leading to distinctive collider signatures. In this work, we investigate the sensitivity to the a--γ--γ' interaction via the mono-photon channel arising from μ^+μ^− → a γ' with a → γγ' at the 1.5 TeV muon collider with an integrated luminosity of ℒ=500 fb^−1 for the polarized and unpolarized beam configurations, P(μ^+,μ^-)=(−100%,+100%) and P(μ^+,μ^-)=(0,0), using detector-level simulation. The signal is characterized by a single energetic photon accompanied by missing energy as the dark photons escape detection. The projected sensitivity reaches the 𝒪(10^−5) GeV^−1 level for ALP masses in the range 1 GeV≤ m_a≤1200 GeV for P(μ^+,μ^-)=(−100%,+100%), while for P(μ^+,μ^-)=(0,0) the projected sensitivity reaches the 𝒪(10^−4) GeV^−1 level for the same ALP mass range. These results demonstrate that the mono-photon signature at a muon collider provides a sensitive probe of the a--γ--γ' interaction over a wide mass range.
ER -