We present what we believe are the first specific string (D-brane) constructions whose low-
energy limit yields just a three generation SU (3)× SU (2)× U (1) standard model with no …

This review is devoted to strings and branes. Firstly, perturbative string theory is introduced.
The appearance of various types of branes is discussed. These include orbifold fixed …

The leading terms in the tree-level effective action for the massless fields of the bosonic
open string are calculated by integrating out all massive fields in Witten's cubic string field …

This thesis is devoted to the study of a class of constructions based on Superstring Theory,
baptized in the literature as Intersecting Brane Worlds. In particular we explore several …

本篇論文主要研究在Ramond-Ramond (RR) 背景場下D 膜(D-brane) 的有效場論. 由於RR
背景場的存在, 這樣的理論在背景場的方向會有體積保持不變的對稱性(volume-preserving …

This thesis is devoted to the study of a class of constructions based on Superstring Theory,
baptized in the literature as Intersecting Brane Worlds. In particular we explore several …

In this thesis we show how to calculate off-shell low energy effective actions and how to
study the dynamics of the tachyon from string field theory. We discuss how to obtain an …