Anomaly-free chiral fermion sets and gauge coupling unification

4th Symposium on Prospects in the Physics of Discrete Symmetries

Simões, C.^1

IFPA, Dép. AGO, Université de Liège, Bât B5a, Sart-Tilman, Liège

4000, Belgium^1

关键词: Energy scale;    Gauge coupling unification;    Gauge couplings;    Gauge group;    Proton decay;    Quantum numbers;    Symmetry-breaking;    The standard model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/631/1/012084/pdf
DOI  :  10.1088/1742-6596/631/1/012084

来源: IOP

【 摘 要 】

In this work we search for minimal sets of chiral fermions, with arbitrary quantum numbers, beyond the Standard Model that are anomaly-free and lead to vector-like particles under SU(3) and U(1)emafter symmetry breaking. We further study which of these anomaly- free sets lead to unification of the gauge couplings at energy scales higher that 5.0 x 1015GeV in order to be consistent with proton decay bounds. A similar study is performed in the context of the SU(5) gauge group; for some of the anomaly-free sets found it is possible to obtain unification of the gauge couplings with the extra fermions decoupling at high intermediate scales.