Searching for ALP Lepton Flavor Violation via ALP Decays at the LHC
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arXiv
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| Format: | Preprint |
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2026
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| author | Zheng, Xiaochu Li, Ruitian Li, Jing Sun, Hao |
| author_facet | Zheng, Xiaochu Li, Ruitian Li, Jing Sun, Hao |
| contents | In the ALP model, lepton flavor violation (LFV) can arise from off-diagonal ALP-lepton couplings ($g_{a\ell_i\ell_j}$), which are absent in the Standard Model. We focus on ALP production via gluon fusion ($pp \to a$) at the Large Hadron Collider (LHC), which dominates the ALP mass range of 5-1000 GeV due to its high cross section and manageable backgrounds. We are interested in the decay of an axion into an electron and a muon, two oppositely charged leptons of different flavors. After background suppression, we obtain the sensitivity to ALP in this mass range, finding significantly improved limits for $5 < m_a < 1000$ GeV, where SM backgrounds are suppressed. Our research is complementary with relevant studies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_03647 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Searching for ALP Lepton Flavor Violation via ALP Decays at the LHC Zheng, Xiaochu Li, Ruitian Li, Jing Sun, Hao High Energy Physics - Phenomenology In the ALP model, lepton flavor violation (LFV) can arise from off-diagonal ALP-lepton couplings ($g_{a\ell_i\ell_j}$), which are absent in the Standard Model. We focus on ALP production via gluon fusion ($pp \to a$) at the Large Hadron Collider (LHC), which dominates the ALP mass range of 5-1000 GeV due to its high cross section and manageable backgrounds. We are interested in the decay of an axion into an electron and a muon, two oppositely charged leptons of different flavors. After background suppression, we obtain the sensitivity to ALP in this mass range, finding significantly improved limits for $5 < m_a < 1000$ GeV, where SM backgrounds are suppressed. Our research is complementary with relevant studies. |
| title | Searching for ALP Lepton Flavor Violation via ALP Decays at the LHC |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2603.03647 |