Proton Decay in a 6D SO(10) model

Abstract

We present a study of proton decay in a supersymmetric $SO(10)$ gauge theory in six dimensions compactified on an orbifold. The dimension 5 proton decay operators are absent, but the dimension 6 are enhanced due to the presence of KK towers. We resum the KK modes up to the cut-off of the theory and find the rate for the dominant mode $p\to {\pi }^0{e}^{+}$. We explore also the flavour dependence, due to the different localization of states in the extra dimensions and find that it is possible to distinguish the model from the usual 4D $SU(5)/SO(10)$ models.

Contribution to 40th Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 5-12 Mar 2005., LaTeX,6 pages,1 figure