On the (Non) Perturbative Origin of Quark Masses in D-brane GUT Models

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dc.creatorKokorelis, Christos
dc.date2008-12-30
dc.date2009-01-13
dc.date.accessioned2026-07-07T12:28:15Z
dc.date.available2026-07-07T12:28:15Z
dc.descriptionWe examine the issue of generating the perturbatively absent ${\bf 10} \cdot {\bf 10} \cdot {\bf 5}^H$ SU(5)/flipped SU(5)Yukawa couplings in type II D-brane orientifold compactifications of string theory both at the perturbative (PER) and the non-perturbative (NP) level. We find at the PER level, higher order terms like $ {\bf 10} \cdot {\bf 10} \cdot {\bf{\bar 5}}^H \cdot{\bf{\bar 5}}^H \cdot {\bf{\bar 5}}^H \cdot {\bf{\bar 5}}^H \cdot {\bf 1}^H \cdot {\bf 1}^H$ in SU(5) may be responsible for the relevant quark mass generation in models with general intersecting D6-branes. Euclidean D2-brane instantons on the other hand can also generate at the NP via the term ${\bf 10} \cdot {\bf 10} \cdot {\bf{\bar 5}}^H \cdot{\bf{\bar 5}}^H \cdot {\bf{\bar 5}}^H \cdot {\bf{\bar 5}}^H $ the relevant quark masses by the use of just the $U(1)_b$ brane, for SU(5) and flipped SU(5) GUTS classes of models. We provide local examples of rigid O(1) instantons within the $T^6/{\mathbb Z}_2 \times {\mathbb Z}_2'$ toroidal orientifold with torsion, whose NP contribution to the masses gets minimal as it is induced by just a duplicated disk diagram.
dc.description26 pages, 1 figure; v2: typos corrected, comments added
dc.identifierhttps://arxiv.org/abs/0812.4804
dc.identifierhttp://arxiv.org/abs/0812.4804
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/215477
dc.subjectHigh Energy Physics - Theory
dc.subjectHigh Energy Physics - Phenomenology
dc.titleOn the (Non) Perturbative Origin of Quark Masses in D-brane GUT Models
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