Artículos de revistas
Su(5) × Su(5) Unification Revisited
Registro en:
Journal Of High Energy Physics. , v. 2011, n. 8, p. - , 2011.
11266708
10.1007/JHEP08(2011)017
2-s2.0-80053147986
Autor
Emmanuel-Costa D.
Franco E.T.
Gonzalez Felipe R.
Institución
Resumen
The idea of grand unification in a minimal supersymmetric SU(5) × 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 a minimal particle content at intermediate energy scales. In particular, the introduction of the SU(2)L triplets belonging to the (15, 1)+(15, 1) representations, as well as of the scalar triplet Σ3 and octet Σ8 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 1010 GeV. We also show that, if the SU(5) × 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. © SISSA 2011. 2011 8
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