Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/1780
Título: SU(5) x SU(5) unification revisited
Autor: Emmanuel-Costa, David
Franco, Edison T.
Felipe, Ricardo Gonzalez
Palavras-chave: Supersymmetric Gauge theory
Gauge symmetry
GUT
Grand unified theories
Heterotic String theory
R-parity conservation
Proton-decay
SU(5)XSU(5) unification
Supersymmetric guts
Gauge
Models
Couplings
Stability
Data: Ago-2011
Editora: Springer
Citação: Emmanuel-Costa David, Franco Edison T, Felipe Ricardo Gonzalez. SU(5) x SU(5) unification revisited. Journal of High Energy Physics. 2011:8.
Relatório da Série N.º: 017
Resumo: The idea of grand unification in a minimal supersymmetric SU(5) x SU(5) framework is revisited. It is shown that the unification of gauge couplings into a unique coupling constant can be achieved at a high-energy scale compatible with proton decay constraints. This requires the addition of minimal particle content at intermediate energy scales. In particular, the introduction of the SU(2)(L) triplets belonging to the (15, 1)+((15) over bar, 1) representations, as well as of the scalar triplet Sigma(3) and octet Sigma(8) in the (24, 1) representation, turns out to be crucial for unification. The masses of these intermediate particles can vary over a wide range, and even lie in the TeV region. In contrast, the exotic vector-like fermions must be heavy enough and have masses above 10(10) GeV. We also show that, if the SU(5) x SU(5) theory is embedded into a heterotic string scenario, it is not possible to achieve gauge coupling unification with gravity at the perturbative string scale.
Peer review: yes
URI: http://hdl.handle.net/10400.21/1780
ISSN: 1126-6708
Aparece nas colecções:ISEL - Física - Artigos

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