GUT and standard-like models in intersecting D-brane worlds

Show full item record

Title: GUT and standard-like models in intersecting D-brane worlds
Author: Chen, Ching-Ming
Abstract: The main goal of string phenomenology is to find a convincing connection be - tween realistic particle physics and string theory . An extended object called D -brane in string theory is shown as a very powerful tool to resolve phenomenology problems . D -branes , D standing for Dirichlet boundary conditions , naturally appear in the T - dual space along one of the toroidally compactified dimensions in non -perturbative Type I theory . A D -brane forms an U (1 ) gauge group and the group structure can be enriched by Chan -Paton indices with multiple coincided D -branes and orientifold ac - tions . Oribfolds define fixed points of the compactified space and break the theory to N = 1 supersymmetry , and the extended orientifold from world -sheet parity projects the brane image to help cancel the anomalies . Strings at the intersections of two D -branes (Type IIA ) form massless chiral fermions as bi -fundamental representations of the gauge groups of the intersecting branes . With these properties , we construct Grand Unification Theory (GUT ) and standard -like models by intersecting D -brane configuration on T6 / (Z2 ? ? ? ? Z2 ) orientifold . Also , supergravity and geometrical fluxes are introduced to stabilize the moduli . In this dissertation , first a brief review of the D -brane theory is discussed , then the complete construction of D -brane configuration on T6 / (Z2 ? ? ? ? Z2 ) is presented , and finally some realistic Trinification , Pati -Salam , SU (5 ) and flipped SU (5 ) models are constructed and discussed . We present the models both in D -brane wrapping numbers and the corresponding particle spectra .
URI: http : / /hdl .handle .net /1969 .1 /4179
Date: 2006-10-30

Citation

GUT and standard-like models in intersecting D-brane worlds. Available electronically from http : / /hdl .handle .net /1969 .1 /4179 .

Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show full item record

Search DSpace

Advanced Search

Browse