Showing 2006 · hep-thShow all

84 papers · 2 filters

hep-th2006★ 4 cited

The D2 Susy Zoo

Dongsu Bak, Nobuyoshi Ohta, Paul K. Townsend

We present new supersymmetric solutions of the Dirac-Born-Infeld equations for time-independent D2-branes, including a 1/2 supersymmetric `dyonic' D2-brane and various 1/4 supersym…

hep-th2006★ 7 cited

Aspects of spinorial geometry

U. Gran, J. Gutowski, G. Papadopoulos +1

We review some aspects of the spinorial geometry approach to the classification of supersymmetric solutions of supergravity theories. In particular, we explain how spinorial geomet…

hep-th2006★ 13 cited

Comments on I1-branes

Ling-Yan Hung

We explore the supergravity solution of D5-branes intersecting as an I1-brane. In a suitable near-horizon limit the geometry is in qualitative agreement with that found in the micr…

hep-th2006★ 28 cited

Measures on transitions for cosmology from eternal inflation

Anthony Aguirre, Steven Gratton, Matthew C Johnson

We argue that in the context of eternal inflation in the landscape, making predictions for cosmological -- and possibly particle physics -- observables requires a measure on the po…

hep-th2006★ 7 cited

Intersecting D7-Branes, I5-Branes and Conifolds

Ling-Yan Hung

A candidate supergravity solution of intersecting D7-branes with a five-dimensional intersecting domain (an I5-brane) is presented. This displays an enhanced Poincare symmetry and…

hep-th2006★ 25 cited

Superconformal Vortex Strings

David Tong

We study the low-energy dynamics of semi-classical vortex strings living above Argyres-Douglas superconformal field theories. The worldsheet theory of the string is shown to be a d…

hep-th2006★ 1 cited

Classification of supersymmetric backgrounds of string theory

U. Gran, J. Gutowski, G. Papadopoulos +1

We review the recent progress made towards the classification of supersymmetric solutions in ten and eleven dimensions with emphasis on those of IIB supergravity. In particular, th…

hep-th2006★ 21 cited

Open G2 Strings

Jan de Boer, Paul de Medeiros, Sheer El-Showk +1

We consider an open string version of the topological twist previously proposed for sigma-models with G2 target spaces. We determine the cohomology of open strings states and relat…

hep-th2006★ 132 cited

Soft SUSY Breaking Terms for Chiral Matter in IIB String Compactifications

Joseph P. Conlon, Shehu S. Abdussalam, Fernando Quevedo +1

This paper develops the computation of soft supersymmetry breaking terms for chiral D7 matter fields in IIB Calabi-Yau flux compactifications with stabilised moduli. We determine e…

hep-th2006★ 132 cited

Ultraviolet properties of Maximal Supergravity

Michael B. Green, Jorge G. Russo, Pierre Vanhove

We argue that recent results in string perturbation theory indicate that the four-graviton amplitude of four-dimensional N=8 supergravity might be ultraviolet finite up to eight lo…

hep-th2006★ 16 cited

The Cosmological Slingshot Scenario: A Stringy Early Times Universe

Cristiano Germani, N. E. Grandi, Alex Kehagias

A cosmological model for the early time Universe is proposed. In this model, the Universe is a wandering brane moving in a warped throat of a Calabi-Yau space. A non-zero angular m…

hep-th2006★ 76 cited

Hurdles for Recent Measures in Eternal Inflation

Anthony Aguirre, Steven Gratton, Matthew C Johnson

In recent literature on eternal inflation, a number of measures have been introduced which attempt to assign probabilities to different pocket universes by counting the number of e…

hep-th2006★ 44 cited

N=31, D=11

U. Gran, J. Gutowski, G. Papadopoulos +1

We show that eleven-dimensional supergravity backgrounds with thirty one supersymmetries, N=31, admit an additional Killing spinor and so they are locally isometric to maximally su…

hep-th2006★ 2 cited

Non-Supersymmetric Charged Domain Walls

Jan B. Gutowski, Wafic A. Sabra

We present general non-supersymmtric domain wall solutions with non-trivial scalar and gauge fields for gauged five-dimensional N=2 supergravity coupled to abelian vector multiplet…

hep-th2006★ 42 cited

The Asymptotic Spectrum of the N=4 Super Yang-Mills Spin Chain

Heng-Yu Chen, Nick Dorey, Keisuke Okamura

In this paper we discuss the asymptotic spectrum of the spin chain description of planar N=4 SUSY Yang-Mills. The states appearing in the spectrum belong to irreducible representat…

hep-th2006★ 43 cited

Hidden symmetry of hyperbolic monopole motion

G. W. Gibbons, C. M. Warnick

Hyperbolic monopole motion is studied for well separated monopoles. It is shown that the motion of a hyperbolic monopole in the presence of one or more fixed monopoles is equivalen…

hep-th2006★ 65 cited

Einstein-Maxwell gravitational instantons and five dimensional solitonic strings

Maciej Dunajski, Sean A. Hartnoll

We study various aspects of four dimensional Einstein-Maxwell multicentred gravitational instantons. These are half-BPS Riemannian backgrounds of minimal N=2 supergravity, asymptot…

hep-th2006★ 17 cited

At the horizon of a supersymmetric AdS_5 black hole: Isometries and half-BPS giants

Aninda Sinha, Julian Sonner, Nemani V. Suryanarayana

The near-horizon geometry of an asymptotically AdS_5 supersymmetric black hole discovered by Gutowski and Reall is analysed. After lifting the solution to 10 dimensions, we explici…

hep-th2006★ 71 cited

Oscillons and quasi-breathers in D+1 dimensions

Paul M. Saffin, Anders Tranberg

We study oscillons in D+1 space-time dimensions using a spherically symmetric ansatz. From Gaussian initial conditions, these evolve by emitting radiation, approaching ``quasi-brea…

hep-th2006★ 95 cited

Kahler Potentials of Chiral Matter Fields for Calabi-Yau String Compactifications

Joseph P. Conlon, Daniel Cremades, Fernando Quevedo

The Kahler potential is the least understood part of effective N=1 supersymmetric theories derived from string compactifications. Even at tree-level, the Kahler potential for the p…

hep-th2006★ 3 cited

Super coset space geometry

A. F. Kleppe, Chris Wainwright

Super coset spaces play an important role in the formulation of supersymmetric theories. The aim of this paper is to review and discuss the geometry of super coset spaces with part…

hep-th2006★ 4 cited

Kac-Moody Algebras and Controlled Chaos

Daniel H. Wesley

Compactification can control chaotic Mixmaster behavior in gravitational systems with p-form matter: we consider this in light of the connection between supergravity models and Kac…

hep-th2006★ 109 cited

Non-renormalisation Conditions in Type II String Theory and Maximal Supergravity

Michael B. Green, Jorge G. Russo, Pierre Vanhove

This paper considers general features of the derivative expansion of Feynman diagram contributions to the four-graviton scattering amplitude in eleven-dimensional supergravity comp…

hep-th2006★ 40 cited

Fermions on Colliding Branes

Gary Gibbons, Kei-ichi Maeda, Yu-ichi Takamizu

We study the behaviour of five-dimensional fermions localized on branes, which we describe by domain walls, when two parallel branes collide in a five-dimensional Minkowski backgro…