ar X iv : h ep - t h / 02 02 04 4 v 2 2 2 Fe b 20 02 NTUA – 02 – 2002 hep - th / 0202044 Brane Cosmology

ar X iv : h ep - t h / 02 02 04 4 v 1 7 F eb 2 00 2 NTUA – 02 – 2002 hep - th / 0202044 Brane Cosmology

The aim of these lectures is to give a brief introduction to brane cosmology. After introducing some basic geometrical notions, we discuss the cosmology of a brane universe with matter localized on the brane. Then we introduce an intrinsic curvature scalar term in the bulk action, and analyze the cosmology of this induced gravity. Finally we present the cosmology of a moving brane in the backgr...

ar X iv : h ep - t h / 02 04 06 6 v 3 1 6 M ay 2 00 2 hep - th / 0204066 FIT HE - 02 - 01 Localization of Gravity on Brane

We address the localization of gravity on the Friedmann-Robertson-Walker type brane embedded in either AdS5 or dS5 bulk space, and derive two definite limits between which the value of the bulk cosmological constant has to lie in order to localize the graviton on the brane. The lower limit implies that the brane should be either dS4 or 4d Minkowski in the AdS5 bulk. The positive upper limit ind...

ar X iv : h ep - t h / 02 11 04 8 v 1 7 N ov 2 00 2 Inflation , Quantum Cosmology and the Anthropic Principle 1

ar X iv : h ep - p h / 02 02 19 1 v 1 2 0 Fe b 20 02 DPNU - 02 - 04 Fermion Mass Hierarchy in 6 dimensional SO ( 10 ) SUSY GUT

We suggest simple models which produce the suitable fermion mass hierarchies and flavor mixing angles based on the supersymmetric SO(10) grand unified theory in 6 dimensions compactified on a T 2 /Z 2 orbifold. The gauge and Higgs fields propagate in 6 dimensions while ordinal chiral matter fields are localized in 4 dimensions. We introduce extra vector-like heavy fields in the extra dimensions...

ar X iv : h ep - t h / 04 02 17 6 v 1 2 3 Fe b 20 04 FIT HE - 04 - 02 Radius stabilization and brane running in RS 1 model

We study the effective potential of a scalar field based on the 5D gauged supergravity for the RS1 brane model in terms of the brane running method. The scalar couples to the brane such that the BPS conditions are satisfied for the bulk configuration. The resulting effective potential implies that the interbrane distance is undetermined in this case, and we need a small BPS breaking term on the...