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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.19462 |
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| _version_ | 1866911573307555840 |
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| author | Tello, Vladimir |
| author_facet | Tello, Vladimir |
| contents | Left-right (LR) symmetric theories predict right-handed charged currents whose flavor structure encodes the realization of parity. While the right-handed quark mixing matrix closely tracks its left-handed counterpart, the leptonic sector with purely Dirac neutrinos has remained structurally unclear. We show that, in contrast to the quark case, parity in the Dirac leptonic sector generically induces a localized, branch-dependent enhancement band in which RH--LH misalignment becomes parametrically large despite small parity breaking. We derive analytic solutions of the LR consistency equation and demonstrate that the interplay between spontaneous parity violation and spectral near-degeneracies leads to a qualitatively new pattern of right-handed mixing. This establishes the Dirac leptonic sector of the minimal LR model as a predictive and structurally distinct regime. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_19462 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Right-Handed Leptonic Mixing and Enhancement Band in Left-Right Symmetry Tello, Vladimir High Energy Physics - Phenomenology Left-right (LR) symmetric theories predict right-handed charged currents whose flavor structure encodes the realization of parity. While the right-handed quark mixing matrix closely tracks its left-handed counterpart, the leptonic sector with purely Dirac neutrinos has remained structurally unclear. We show that, in contrast to the quark case, parity in the Dirac leptonic sector generically induces a localized, branch-dependent enhancement band in which RH--LH misalignment becomes parametrically large despite small parity breaking. We derive analytic solutions of the LR consistency equation and demonstrate that the interplay between spontaneous parity violation and spectral near-degeneracies leads to a qualitatively new pattern of right-handed mixing. This establishes the Dirac leptonic sector of the minimal LR model as a predictive and structurally distinct regime. |
| title | Right-Handed Leptonic Mixing and Enhancement Band in Left-Right Symmetry |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2603.19462 |