Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2003-09-10
Fortsch.Phys.52:28-137,2004
Physics
High Energy Physics
High Energy Physics - Theory
171 pages, PhD thesis, ref. added
Scientific paper
10.1002/prop.200410118
Intersecting branes have been the subject of string model building for several years. This work introduces in detail the toroidal and Z_N-orientifolds, where the main discussion employs the picture of intersecting D6-branes. The derivation of the R-R and NS-NS tadpole cancellation conditions in CFT is shown in detail. Various aspects of the massless spectrum are discussed, involving spacetime anomalies, the generalized Green-Schwarz mechanism and possible gauge breaking mechanisms. Both N=1 SUSY and non-SUSY approaches to low energy model building are treated. Firstly, the problem of complex structure instabilities in toroidal OmegaR-orientifolds is approached by a Z_3-orbifolded model, including a stable non-SUSY 3-generation standard-like model. It descends naturally from a flipped SU(5) GUT. Secondly, supersymmetric models on the Z_4-orbifold are discussed, involving exceptional 3-cycles and the explicit construction of fractional D-branes. A three generation Pati-Salam model that even can be broken down to a MSSM-like model is constructed as an example, involving non-flat and non-factorizable branes. Finally, the possibility that unstable closed and open string moduli could play the role of the inflaton is being explored. In the closed string sector, the slow-rolling requirement can only be fulfilled for very specific cases, where some moduli are frozen and a special choice of coordinates is taken. In the open string sector, inflation is not possible at all.
No associations
LandOfFree
Aspects of Stability and Phenomenology in Type IIA Orientifolds with Intersecting D6-branes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Aspects of Stability and Phenomenology in Type IIA Orientifolds with Intersecting D6-branes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aspects of Stability and Phenomenology in Type IIA Orientifolds with Intersecting D6-branes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-348960