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Flavour structure and proton decay in 6D orbifold GUTs

W. Buchmuller·L. Covi·D. Emmanuel-Costa·S. Wiesenfeldt
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Abstract

We study proton decay in a supersymmetric {\sf SO(10)} gauge theory in six dimensions compactified on an orbifold. The dimension-5 proton decay operators are forbidden by R-symmetry, whereas the dimension-6 operators are enhanced due to the presence of KK towers. Three sequential quark-lepton families are localised at the three orbifold fixed points, where {\sf SO(10)} is broken to its three GUT subgroups. The physical quarks and leptons are mixtures of these brane states and additional bulk zero modes. This leads to a characteristic pattern of branching ratios in proton decay, in particular the suppression of the $p\to \m^+K^0$ mode.

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W. Buchmuller, L. Covi, D. Emmanuel-Costa, S. Wiesenfeldt. 2004-07-06. Flavour structure and proton decay in 6D orbifold GUTs. https://doi.org/10.1088/1126-6708%2F2004%2F09%2F004

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