Nuclear $μ-e$ conversion via Lorentz and CPT violation
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arXiv
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866911484408233984 |
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| author | McNulty, William P. |
| author_facet | McNulty, William P. |
| contents | One of the three common experimental channels searching for charged lepton flavor violation (CLFV) via $μ-e$ conversion involves first capturing the muon on a nuclear target. This channel provides a unique opportunity to constrain four-point quark-lepton operators that may contribute to CLFV, in addition to the electromagnetic operators that can also be accessed in the other channels. We investigate the leading Lorentz- and CPT-violating contributions for nuclear $μ-e$ conversion experiments within the Standard-Model Extension and obtain the first bounds on the relevant quark-lepton operators using the results of the SINDRUM II experiment; we also consider possibilities for improved constraints from upcoming experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_04171 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Nuclear $μ-e$ conversion via Lorentz and CPT violation McNulty, William P. High Energy Physics - Phenomenology One of the three common experimental channels searching for charged lepton flavor violation (CLFV) via $μ-e$ conversion involves first capturing the muon on a nuclear target. This channel provides a unique opportunity to constrain four-point quark-lepton operators that may contribute to CLFV, in addition to the electromagnetic operators that can also be accessed in the other channels. We investigate the leading Lorentz- and CPT-violating contributions for nuclear $μ-e$ conversion experiments within the Standard-Model Extension and obtain the first bounds on the relevant quark-lepton operators using the results of the SINDRUM II experiment; we also consider possibilities for improved constraints from upcoming experiments. |
| title | Nuclear $μ-e$ conversion via Lorentz and CPT violation |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2603.04171 |