Seesaw Neutrinos from the Heterotic String

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dc.creatorBuchmuller, Wilfried
dc.creatorHamaguchi, Koichi
dc.creatorLebedev, Oleg
dc.creatorRamos-Sanchez, Saul
dc.creatorRatz, Michael
dc.date2007-03-07
dc.date2007-06-27
dc.date.accessioned2026-07-07T11:22:46Z
dc.date.available2026-07-07T11:22:46Z
dc.descriptionWe study the possibility of realizing the neutrino seesaw mechanism in the E8XE8 heterotic string. In particular, we consider its Z_6 orbifold compactifications leading to the supersymmetric standard model gauge group and matter content. We find that these models possess all the necessary ingredients for the seesaw mechanism, including the required Dirac Yukawa couplings and large Majorana mass terms. We argue that this situation is quite common in heterotic orbifolds. In contrast to the conventional seesaw of grand unified theories (GUTs), no large GUT representations are needed to generate the Majorana mass terms. The total number of right--handed neutrinos can be very large, up to O(100).
dc.description4 pages; to appear in Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/hep-ph/0703078
dc.identifierhttp://arxiv.org/abs/hep-ph/0703078
dc.identifierPhys.Rev.Lett.99:021601,2007
dc.identifierdoi:10.1103/PhysRevLett.99.021601
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194682
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleSeesaw Neutrinos from the Heterotic String
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