Reference : Minimal anomaly-free chiral fermion sets and gauge coupling unification
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/176092
Minimal anomaly-free chiral fermion sets and gauge coupling unification
English
Ceboa, Luis mailto [Centro de Física Teórica de Partículas (CFTP), Instituto Superior Técnico, Universidade de Lisboa > Departamento de Física > > >]
Emmanuel-Costa, David mailto [Centro de Física Teórica de Partículas (CFTP), Instituto Superior Técnico, Universidade de Lisboa > Departamento de Física > > >]
González Felipe, Ricardo mailto [Instituto Superior de Engenharia de Lisboa – ISEL and Centro de Física Teórica de Partículas (CFTP), Instituto Superior Técnico, Universidade de Lisboa > > > >]
Da Silva Simoes, Catarina mailto [Centro de Física Teórica de Partículas (CFTP), Instituto Superior Técnico, Universidade de Lisboa > > > >]
30-Dec-2014
Physical Review. D, Particles, Fields, Gravitation, and Cosmology
American Physical Society
Yes (verified by ORBi)
International
1550-7998
1550-2368
College Park
MD
[en] We look for minimal chiral sets of fermions beyond the standard model that are anomaly free and, simultaneously, vectorlike particles with respect to color SU(3) and electromagnetic U(1). We then study whether the addition of such particles to the standard model particle content allows for the unification of gauge couplings at a high energy scale, above 5.0 × 1015 GeV so as to be safely consistent with proton decay bounds. The possibility to have unification at the string scale is also considered. Inspired in grand unified theories, we also search for minimal chiral fermion sets that belong to SU(5) multiplets, restricted to representations up to imension 50. It is shown that, in various cases, it is possible to achieve gauge unification provided that some of the extra fermions decouple at relatively high intermediate scales.
http://hdl.handle.net/2268/176092
10.1103/PhysRevD.90.125037

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