Regular Article - Theoretical Physics
Grand unification on noncommutative spacetime
Service de Physique Théorique, CP225, Boulevard du Triomphe, 1050, Brussels, Belgium
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Published online: 19 January 2007
We compute the beta-functions of the standard model formulated on a noncommutative spacetime. If we assume that the scale for spacetime noncommutativity is of the order of 2.2×1015 GeV, we find that the three gauge couplings of the standard model merge at a scale of 2.3×1017 GeV. The proton lifetime is thus much longer than in conventional unification models.
© Springer-Verlag Berlin Heidelberg, 2007