Anomaly-free chiral fermion sets and gauge coupling

Anomaly-free chiral fermion sets and gauge coupling

EPS HEP 2015
Contribution ID : 500
Type : poster
Anomaly-free chiral fermion sets and gauge
coupling unification
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 electromagnetic U(1)
after symmetry breaking. We further study which of these anomaly-free sets lead to unification of the gauge
couplings at energy scales higher that 5.0×10ˆ15 GeV 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.
additional information
Primary author(s) : Dr. SIMOES, Catarina (IFPA, University of Liège); Dr. EMMANUEL-COSTA, David (D.
Emmanuel-Costa1,†, R. González FelipeDepartamento de Física and Centro de Física Teórica de Partículas (CFTP),
Instituto Superior Técnico, Universidade de Lisboa); Mr. CEBOLA, Luis (Departamento de Física and Centro de
Física Teórica de Partículas (CFTP), Instituto Superior Técnico, Universidade de Lisboa); Dr. GONZÁLEZ FELIPE,
Ricardo (Departamento de Física and Centro de Física Teórica de Partículas (CFTP), Instituto Superior Técnico,
Universidade de Lisboa; Instituto Superior de Engenharia de Lisboa, ISEL)
Presenter(s) : Dr. SIMOES, Catarina (IFPA, University of Liège)
Track Classification : Flavour Physics and Fundamental Symmetries