Vacuum Cherenkov radiation for nonminimal dimension-5 Lorentz violation
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866914013020946432 |
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| author | Petrov, A. Yu. Schreck, M. Vieira, A. R. |
| author_facet | Petrov, A. Yu. Schreck, M. Vieira, A. R. |
| contents | Vacuum Cherenkov radiation is investigated in the Lorentz-violating Standard-Model Extension for isotropic dim-5 operators $\hat{m}$ and $\hat{a}^μ$ in the fermion sector. Both the kinematics and dynamics of this process are analyzed by analytical and numerical means, leading to its decay and radiated-energy rates as functions of the initial-fermion momentum. We adopt the point of view that vacuum Cherenkov radiation is actually a physical phenomenon expected to occur for a charged, massive fermion in the presence of Lorentz violation, when some additional requirements are satisfied. The absence of this effect in ultrahigh-energy cosmic rays detected on Earth allows us to infer stringent bounds on isotropic dim-5 Lorentz violation in protons, quarks, and electrons. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_21212 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Vacuum Cherenkov radiation for nonminimal dimension-5 Lorentz violation Petrov, A. Yu. Schreck, M. Vieira, A. R. High Energy Physics - Phenomenology High Energy Physics - Theory Vacuum Cherenkov radiation is investigated in the Lorentz-violating Standard-Model Extension for isotropic dim-5 operators $\hat{m}$ and $\hat{a}^μ$ in the fermion sector. Both the kinematics and dynamics of this process are analyzed by analytical and numerical means, leading to its decay and radiated-energy rates as functions of the initial-fermion momentum. We adopt the point of view that vacuum Cherenkov radiation is actually a physical phenomenon expected to occur for a charged, massive fermion in the presence of Lorentz violation, when some additional requirements are satisfied. The absence of this effect in ultrahigh-energy cosmic rays detected on Earth allows us to infer stringent bounds on isotropic dim-5 Lorentz violation in protons, quarks, and electrons. |
| title | Vacuum Cherenkov radiation for nonminimal dimension-5 Lorentz violation |
| topic | High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2508.21212 |