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- Title
Magic zeroes and hidden symmetries.
- Authors
Craig, Nathaniel; Garcia, Isabel Garcia; Vainshtein, Arkady; Zhang, Zhengkang
- Abstract
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.
- Subjects
RENORMALIZATION (Physics); DISCRETE symmetries; MAGIC; SYMMETRY breaking; ELECTRIC dipole moments; DIPOLE moments
- Publication
Journal of High Energy Physics, 2022, Vol 2022, Issue 5, p1
- ISSN
1126-6708
- Publication type
Article
- DOI
10.1007/JHEP05(2022)079