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- Title
A New Look at b → s Observables in 331 Models.
- Authors
Loparco, Francesco
- Abstract
Flavour changing neutral current (FCNC) processes are described by loop diagrams in the Standard Model (SM), while in 331 models, based on the gauge group SU (3) C × SU (3) L × U (1) X , they are dominated by tree-level exchanges of a new heavy neutral gauge boson Z ′ . By exploiting this feature, observables related to FCNC decays of K, B d and B s mesons can be considered in several variants of 331 models. The variants are distinguished by the value of a parameter β that plays a key role in this framework. Imposing constraints on the Δ F = 2 observables, we select possible ranges for the mass of the Z ′ boson in correspondence to the values β = ± k / 3 , with k = 1 , 2 . The results are used to determine the impact of 331 models on b → s processes and on the correlations among them, in the light of new experimental data recently released.
- Subjects
STANDARD model (Nuclear physics); Z bosons; DATA release; MESONS; GAUGE bosons
- Publication
Particles (2571-712X), 2024, Vol 7, Issue 1, p161
- ISSN
2571-712X
- Publication type
Article
- DOI
10.3390/particles7010009