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PreprintCC BY 4.0arXiv

Searching for long-lived ALPs with a laser-assisted optical dump

  • Tong Li
  • Haolong Wang
  • Man Yuan
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Abstract

The feeble interactions of light axion-like particles (ALPs) render them long-lived. Probing long-lived ALPs therefore demands facilities with a macroscopic decay volume to match their potentially long decay lengths, such as high-intensity beam dump experiments. An optical dump setup was proposed by utilizing hard photons from the collision of a high-energy electron beam and a high-intensity laser pulse. In this work, we revisit the probe of long-lived ALPs with MeV∼ GeV mass via a laser-assisted optical dump. We consider the low-energy effective Lagrangian for ALPs incorporating the ALP-photon and ALP-fermion interactions. The scope of optical dump searches is extended to both the ALP-photon coupling induced Primakoff process and the Compton-like scattering via the ALP-electron coupling. We also investigate the correlation between Primakoff process and Compton scattering, and exhibit the interplay of two ALP couplings in light of optical dump experiment.

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Cite

BibTeXRIS
BibTeX
@misc{li2026searching,
  title = {{Searching for long-lived ALPs with a laser-assisted optical dump}},
  author = {Tong Li and Haolong Wang and Man Yuan},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2607.14492},
  eprint = {2607.14492},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2607.14492},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Searching for long-lived ALPs with a laser-assisted optical dump
AU  - Tong Li
AU  - Haolong Wang
AU  - Man Yuan
PY  - 2026
DA  - 2026/09/22
PB  - arXiv
DO  - 10.48550/arxiv.2607.14492
UR  - https://arxiv.org/abs/2607.14492
AB  - The feeble interactions of light axion-like particles (ALPs) render them long-lived. Probing long-lived ALPs therefore demands facilities with a macroscopic decay volume to match their potentially long decay lengths, such as high-intensity beam dump experiments. An optical dump setup was proposed by utilizing hard photons from the collision of a high-energy electron beam and a high-intensity laser pulse. In this work, we revisit the probe of long-lived ALPs with MeV∼ GeV mass via a laser-assisted optical dump. We consider the low-energy effective Lagrangian for ALPs incorporating the ALP-photon and ALP-fermion interactions. The scope of optical dump searches is extended to both the ALP-photon coupling induced Primakoff process and the Compton-like scattering via the ALP-electron coupling. We also investigate the correlation between Primakoff process and Compton scattering, and exhibit the interplay of two ALP couplings in light of optical dump experiment.
ER  -