ar X iv : h ep - p h / 05 02 04 8 v 1 4 Fe b 20 05 Higher - derivative gravity in brane world models
نویسنده
چکیده
We investigate brane world models in higher-derivative gravity theories where the gravitational Lagrangian is an arbitrary function of the Ricci scalar. Making use of the conformal equivalence of such gravity models and Einstein-Hilbert gravity with a scalar field, we deduce the main features of higher-derivative gravity brane worlds. We solve for a gravity model that has corrections quadratic in the Ricci scalar and show one can evade both fine-tuning and the need for a bulk cosmological constant. An analysis of tensor and scalar perturbations shows gravity is localized on the brane and we recover the Newtonian limit.
منابع مشابه
ar X iv : h ep - t h / 05 02 05 5 v 1 4 Fe b 20 05 BPS pp - wave brane cosmological solutions in string theory
We construct time dependent BPS pp-wave brane solutions in the context of M-theory and type II supergravity. It is found that N-brane solutions we considered satisfy the crossing rule as S-brane solutions but 1/8 supersymmetry remains. By applying them to the cosmological setting, inflationary solutions are obtained. During this inflation, the size of the extradimensions becomes smaller than ou...
متن کاملar X iv : h ep - p h / 05 02 17 5 v 1 1 8 Fe b 20 05 HUTP
Inspired by the AdS/CFT correspondence, we show that any G/H symmetry breaking pattern can be described by a simple two-site moose diagram. This construction trivially reproduces the CCWZ prescription in the context of Hidden Local Symmetry. We interpret this moose in a novel way to show that many little Higgs theories can emerge from ordinary chiral symmetry breaking in scaled-up QCD. We apply...
متن کاملar 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
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...
متن کاملar X iv : h ep - p h / 04 02 19 0 v 1 1 8 Fe b 20 04 1 Pentaquarks in the 10 F - and 10 F - plets
متن کامل
ar X iv : h ep - t h / 05 09 07 2 v 1 9 Se p 20 05 Gravity Mediation in 6 d Brane - World Supergravity
We consider the gravity-mediated SUSY breaking within the effective theory of six-dimensional brane-world supergravity. We construct the supersymmetric bulk-brane action by Noether method and find the nontrivial moduli coupling of the brane Fand D-terms. We find that the low energy Kähler potential is not of sequestered form, so gravity mediation may occur at tree level. In moduli stabilization...
متن کامل