Article (Scientific journals)
Minimal anomaly-free chiral fermion sets and gauge coupling unification
Ceboa, Luis; Emmanuel-Costa, David; González Felipe, Ricardo et al.
2014In Physical Review. D, Particles, Fields, Gravitation, and Cosmology
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Abstract :
[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.
Disciplines :
Physics
Author, co-author :
Ceboa, Luis;  Centro de Física Teórica de Partículas (CFTP), Instituto Superior Técnico, Universidade de Lisboa > Departamento de Física
Emmanuel-Costa, David;  Centro de Física Teórica de Partículas (CFTP), Instituto Superior Técnico, Universidade de Lisboa > Departamento de Física
González Felipe, Ricardo;  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 ;  Centro de Física Teórica de Partículas (CFTP), Instituto Superior Técnico, Universidade de Lisboa
Language :
English
Title :
Minimal anomaly-free chiral fermion sets and gauge coupling unification
Publication date :
30 December 2014
Journal title :
Physical Review. D, Particles, Fields, Gravitation, and Cosmology
ISSN :
1550-7998
eISSN :
1550-2368
Publisher :
American Physical Society, College Park, United States - Maryland
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 08 January 2015

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