Probing the couplings of an axion-like particle with leptons via three-lepton final state processes at future $e^{-}p$ colliders
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912305020665856 |
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| author | Yue, Chong-Xing Li, Xin-Yang Wang, Mei-Shu-Yu Bu, Yang-Yang |
| author_facet | Yue, Chong-Xing Li, Xin-Yang Wang, Mei-Shu-Yu Bu, Yang-Yang |
| contents | The axion-like particle (ALP) is one of the best motivated particles beyond the Standard Model (SM). We explore the possibility of detecting the couplings of ALP with leptons via three-lepton final state processes $e^- p \to e^- j a~(a \to \ell^+ \ell^-)$ at the LHeC (FCC-eh). For completeness, we investigate the cases where the ALP decays not only into electron and muon pairs but also into tau pairs, and perform a detailed simulation for the decays of taus. We find that the prospective sensitivities of the LHeC (FCC-eh) with the center-of-mass energy $\sqrt{s}=1.3~(3.5)$ TeV and the integrated luminosity $\mathcal{L}=1~ (2)$ ab$^{-1}$ to the ALP-lepton couplings are not only stronger than some existing bounds of the LHC and LEP but also complementary to the expected bounds of the CEPC and FCC-ee. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_03179 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Probing the couplings of an axion-like particle with leptons via three-lepton final state processes at future $e^{-}p$ colliders Yue, Chong-Xing Li, Xin-Yang Wang, Mei-Shu-Yu Bu, Yang-Yang High Energy Physics - Phenomenology The axion-like particle (ALP) is one of the best motivated particles beyond the Standard Model (SM). We explore the possibility of detecting the couplings of ALP with leptons via three-lepton final state processes $e^- p \to e^- j a~(a \to \ell^+ \ell^-)$ at the LHeC (FCC-eh). For completeness, we investigate the cases where the ALP decays not only into electron and muon pairs but also into tau pairs, and perform a detailed simulation for the decays of taus. We find that the prospective sensitivities of the LHeC (FCC-eh) with the center-of-mass energy $\sqrt{s}=1.3~(3.5)$ TeV and the integrated luminosity $\mathcal{L}=1~ (2)$ ab$^{-1}$ to the ALP-lepton couplings are not only stronger than some existing bounds of the LHC and LEP but also complementary to the expected bounds of the CEPC and FCC-ee. |
| title | Probing the couplings of an axion-like particle with leptons via three-lepton final state processes at future $e^{-}p$ colliders |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2503.03179 |