Magic zeroes and hidden symmetries
| Autor: | Nathaniel Craig, Isabel Garcia Garcia, Arkady Vainshtein, Zhengkang Zhang |
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| Rok vydání: | 2022 |
| Předmět: |
Quantum Physics
Nuclear and High Energy Physics Electric Dipole Moments Molecular FOS: Physical sciences Discrete Symmetries Effective Field Theories Atomic Nuclear & Particles Physics High Energy Physics - Phenomenology Particle and Plasma Physics High Energy Physics - Phenomenology (hep-ph) Nuclear Mathematical Physics |
| Zdroj: | Journal of High Energy Physics Journal of High Energy Physics, vol 2022, iss 5 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/jhep05(2022)079 |
| Popis: | Selection rules arising from accidental or broken symmetries may be sufficiently obscure that their agency is hidden, leading to the appearance of "magic zeroes" -- quantities that are suppressed without apparent recourse to a symmetry explanation. Magic zeroes and their corresponding hidden symmetries may shed new light on parametric hierarchies in the Standard Model and beyond. We identify the hidden symmetry responsible for a recently-discovered magic zero, the vanishing of the putative leading contribution to the anomalous dipole moments of the muon upon integrating out weak doublet and singlet vector-like fermions. Some of the tools involved -- spurion analysis leveraging discrete symmetries of the free theory, field redefinitions, spectator fields, and non-supersymmetric non-renormalization theorems -- may prove useful in the hunt for new magic zeroes and their hidden symmetries. 23 pages + appendix |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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