Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-04-26
Physics
High Energy Physics
High Energy Physics - Phenomenology
UCB PhD Thesis, 130 Pages
Scientific paper
A review of orbifold geometry is given, followed by a review of the construction of four-dimensional heterotic string models by compactification on a six-dimensional Z_3 orbifold. Particular attention is given to the details of the transition from a classical theory to a first-quantized theory. Subsequently, a discussion is given of the systematic enumeration of all standard-like three generation models subject to certain limiting conditions. It is found that the complete set is described by 192 models, with only five possibilities for the hidden sector gauge group. It is argued that only four of the hidden sector gauge groups are viable for dynamical supersymmetry breaking, leaving only 175 promising models in the class. General features of the spectra of matter states in all 175 models are discussed. Twenty patterns of representations are found to occur. Accomodation of the Minimal Supersymmetric Standard Model (MSSM) spectrum is addressed. States beyond those contained in the MSSM and nonstandard hypercharge normalization are shown to be generic, though some models do allow for the usual hypercharge normalization found in SU(5) embeddings of the Standard Model gauge group. Only one of the twenty patterns of representations, comprising seven of the 175 models, is found to be without an anomalous U(1). Various quantities of interest in effective supergravity model building are tabulated for the set of 175 models. String scale gauge coupling unification is shown to be possible, albeit contrived, in an example model.
No associations
LandOfFree
Heterotic Orbifolds 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 Heterotic Orbifolds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heterotic Orbifolds will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-383231