Results 31 to 40 of about 440 (160)

braneworld cosmology and holography [PDF]

, 2002
This thesis is devoted to studying two important aspects of braneworld physics: their cosmology and their holography. We examine the Einstein equations induced on a general (n - 2)-brane of arbitrary tension, embedded in some n-dimensional bulk.
Padilla, Antonio
core  

The dynamics of three-forms in thick branes

Journal of High Energy Physics
In this work, we investigate thick brane models with a single three-form field. We find novel solutions for thick braneworlds where only three-forms exist and interact gravitationally in the bulk, both with and without matter fields. We use an additional
Jake E. B. Gordin, Kelly MacDevette, Jenna Bruton   +2 more
doaj   +1 more source

Traces of Extra Dimensions in Cosmology [PDF]

, 2010
In this thesis, we discuss the observational consequences of extra dimensions on cosmological phenomena. We begin with an overview of extra dimensions, from the initial ideas of Kaluza and Klein to the more recent concept of braneworld models and in ...
O'Callaghan, Eimear Eileen, O'CALLAGHAN, EIMEAR,EILEEN   +1 more
core  

Emergence of R 4-terms in M-theory

Journal of High Energy Physics
It has been recently suggested that the strong Emergence Proposal is realized in M-theory limits by integrating out all light towers of states with a typical mass scale not larger than the species scale, i.e. the eleventh dimensional Planck mass.
Ralph Blumenhagen, Niccolò Cribiori, Aleksandar Gligovic, Antonia Paraskevopoulou   +3 more
doaj   +1 more source

Gauge coupling unification in E 6 F-theory GUTs with matter and bulk exotics from flux breaking

, 2013
We consider gauge coupling unification in E 6 F-Theory Grand Unified Theories (GUTs) where E 6 is broken to the Standard Model (SM) gauge group using fluxes. In such models there are two types of exotics that can affect gauge coupling unification, namely
King, Stephen F., Leontaris, George K., Callaghan, James C.   +2 more
core   +1 more source

Uplifts in the penumbra: features of the moduli potential away from infinite-distance boundaries

Journal of High Energy Physics
The construction of meta-stable four-dimensional de Sitter vacua in type IIB string compactifications represents an important question and an ongoing area of work.
Stefano Lanza, Alexander Westphal
doaj   +1 more source

Geometry of black holes and braneworlds in higher dimensions [PDF]

, 2004
This tliesis first discusses braneworld models, we explain how the bulk geometry in codimension 2 scenarios restricts braneworld fields in a way inconsistent with observation.
Paul B. Bostock, Bostock, Paul B, Bostock, Paul B.   +2 more
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A comprehensive survey of brane tilings [PDF]

, 2017
An infinite class of 4dN=1 gauge theories can be engineered on the worldvolume of D3-branes probing toric Calabi–Yau 3-folds. This kind of setup has multiple applications, ranging from the gauge/gravity correspondence to local model building in string ...
He, Y-H., Yang-Hui He, Xiao, Y., Sun, C., Franco, S., Sebastián Franco, Chuang Sun, Yan Xiao   +7 more
core   +1 more source

Toroidal Orbifolds: Resolutions, Orientifolds and Applications in String Phenomenology [PDF]

, 2006
As of now, string theory is the best candidate for a theory of quantum gravity. Since it is anomaly–free only in ten space-time dimensions, the six surplus spatial dimensions must be compactified.
Reffert, Susanne / S.
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Type IIA string theory on T 6/(Z2 × Z6 × OmegaR) : model building and string phenomenology with intersecting D6-branes

, 2016
In this doctoral thesis, various aspects of string model building and phenomenology are investigated within the framework of Type IIA string theory on the T 6/(Z2 × Z6 × ΩR) orbifold with discrete torsion. The aim is the reproduction of supersymmetric versions of well-known particle physics models using intersecting rigid D6-branes wrapped on ...
openaire   +2 more sources