scholarly journals Localising gravity in composite monopole brane worlds without bulk cosmological constant

2006 ◽  
Vol 639 (5) ◽  
pp. 546-552 ◽  
Author(s):  
Eugênio R. Bezerra de Mello ◽  
Betti Hartmann
Keyword(s):  
Cosmological Constant ◽  
Brane Worlds ◽  
Bulk Cosmological Constant

scholarly journals de Sitter in non-supersymmetric string theories: no-go theorems and brane-worlds

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
Ivano Basile ◽  
Stefano Lanza
Keyword(s):  
Flux Compactifications ◽  
Cosmological Constant ◽  
Dimensional Reduction ◽  
Brane World ◽  
De Sitter ◽  
Top Down ◽  
Brane Worlds ◽  
Concrete Realization ◽  
String Models ◽  
String Theories

Abstract We study de Sitter configurations in ten-dimensional string models where supersymmetry is either absent or broken at the string scale. To this end, we derive expressions for the cosmological constant in general warped flux compactifications with localized sources, which yield no-go theorems that extend previous works on supersymmetric cases. We frame our results within a dimensional reduction and connect them to a number of Swampland conjectures, corroborating them further in the absence of supersymmetry. Furthermore, we construct a top-down string embedding of de Sitter brane-world cosmologies within unstable anti-de Sitter landscapes, providing a concrete realization of a recently revisited proposal.

WARPED COMPACTIFICATION ON SIGMA MODEL, SKYRMIONS IN SIX DIMENSIONS

2007 ◽  
Vol 22 (31) ◽  
pp. 5670-5684 ◽  
Author(s):  
Yuta Kodama ◽  
Kento Kokubu ◽  
Nobuyuki Sawado ◽  
Noriko Shiiki
Keyword(s):  
Field Theory ◽  
Cosmological Constant ◽  
Effective Field Theory ◽  
Extra Dimensions ◽  
Sigma Model ◽  
Effective Field ◽  
Winding Number ◽  
Bulk Cosmological Constant ◽  
Six Dimensions

We construct two distinct brane solutions in six dimensional effective field theory models. The CP 1 sigma model and the baby skyrmion realize warped compactification of the extra dimensions for negative bulk cosmological constant. Higher winding number solutions of the baby skyrmion are also presented.

scholarly journals Nontrival cosmological constant in brane worlds with unorthodox lagrangians

2011 ◽  
Vol 2011 (07) ◽  
pp. 007-007 ◽  
Author(s):  
Stefan Förste ◽  
Hans Peter Nilles ◽  
Ivonne Zavala
Keyword(s):  
Cosmological Constant ◽  
Brane Worlds

scholarly journals Vector fields localization on brane worlds

2021 ◽  
Vol 67 (3 May-Jun) ◽  
pp. 415
Author(s):  
R. Guerrero ◽  
R. Omar Rodríguez ◽  
F. Carreras
Keyword(s):  
Vector Fields ◽  
Domain Walls ◽  
Charged Particles ◽  
The Self ◽  
Vector State ◽  
Massive Vector ◽  
Brane Worlds ◽  
Vector Bosons ◽  
Bulk Cosmological Constant ◽  
Singular Domain

To confine vector bosons in the four dimensional sector of a domain wall spacetime, we propose a mechanism in which the interaction among vectors is propagated via the self-interaction of the scalar wall.  In the process, the vector acquires an asymptotic mass, defined by the bulk cosmological constant, and it ends up coupled to the wall by the tension of the brane. The mechanism is applied on the Randall Sundrum scenario and regular versions of it, and on singular domain walls. In any case, the  electrostatic potential between two charged particles is defined by both the vector state attached to the wall and a continuous tower of massive vector states that propagate freely along the scenario's extra dimension.

scholarly journals BLACK HOLES IN THE PRESENCE OF COSMOLOGICAL CONSTANT AND LARGE-N BRANE WORLD

2009 ◽  
Vol 24 (26) ◽  
pp. 2107-2118 ◽  
Author(s):  
MINGXING LUO ◽  
SIBO ZHENG
Keyword(s):  
Cosmological Constant ◽  
Higher Dimensions ◽  
Brane World ◽  
Gauge Fields ◽  
Brane Worlds ◽  
Gravitational Theories ◽  
Large N ◽  
Gauge Gravity ◽  
Gravity Duality ◽  
Constant Dilaton

Gravitational theories including negative cosmological constant, dilaton and gauge fields are explored in higher dimensions, in which black hole solutions are shown to exist and their asymptotic behaviors are obtained. Based on these solutions, effective Randall–Sundrum brane worlds are constructed. In the framework of gauge/gravity duality, effects from cosmological constant on the spectra of standard model fields on the branes are perturbatively calculated.

Cosmology in multiply warped braneworld scenario

2014 ◽  
Vol 29 (13) ◽  
pp. 1450069 ◽  
Author(s):  
Narayan Banerjee ◽  
Sayantani Lahiri ◽  
Soumitra SenGupta
Keyword(s):  
Cosmological Constant ◽  
Extra Dimensions ◽  
Fine Tuning ◽  
Fermion Mass ◽  
Mass Hierarchy ◽  
Hubble Expansion ◽  
Cosmological Scenario ◽  
Higher Dimensional ◽  
Gauge Hierarchy ◽  
Bulk Cosmological Constant

Hubble expansion in warped braneworld model is addressed in the presence of more than one warped extra dimensions. Some distinct phenomenological signatures of such model has already been discussed in the context of collider-based experiments as well as to explain the fermion mass hierarchy in the Standard Model of elementary particles. In this paper, we explore some cosmological implications of such a model. It is shown that while the expansion depends on all the moduli, an exponential nature of the expansion of the scale factor emerges as a generic feature which is independent of the number of extra dimensions but depends only on the bulk cosmological constant and brane pressure. A generalized expression for the effective 3-brane cosmological constant in such model has been derived. This generalizes the well-known fine tuning/detuning between the bulk cosmological constant and brane tension to obtain the desired cosmological constant on the brane. The warped factor corresponding to the higher-dimensional cosmological scenario is determined and the issue of gauge hierarchy problem is discussed.

scholarly journals LOCALIZING GRAVITY ON A 3-BRANE IN HIGHER DIMENSIONS

2001 ◽  
Vol 16 (supp01c) ◽  
pp. 943-945 ◽  
Author(s):  
TONY GHERGHETTA
Keyword(s):  
Magnetic Field ◽  
Cosmological Constant ◽  
Power Law ◽  
Higher Dimensions ◽  
Positive Zero ◽  
Dimensional Gravity ◽  
Bulk Cosmological Constant

We present metric solutions in six and higher dimensions with bulk cosmological constant, where gravity is localized on a 3-brane. The corrections to four-dimensional gravity from the bulk continuum modes are power-law suppressed. Furthermore, the introduction of a bulk "hedgehog" magnetic field leads to a regular geometry, and can localize gravity on the 3-brane with either positive, zero or negative bulk cosmological constant.

scholarly journals STRING THEORY AS A UNIVERSAL LANGUAGE

2001 ◽  
Vol 16 (28) ◽  
pp. 4511-4525 ◽  
Author(s):  
A. M. POLYAKOV
Keyword(s):  
String Theory ◽  
Cosmological Constant ◽  
Gauge Theories ◽  
Higher Dimensions ◽  
Brane Worlds ◽  
Open Strings ◽  
Universal Language ◽  
Conformal Gauge

This article, based on the Klein lecture, contains some new results and new speculations on various topics. They include discussion of open strings in the AdS space, unusual features of D-branes, conformal gauge theories in higher dimensions. We also comment on the infrared screening of the cosmological constant and on the ''brane worlds.''

BRANE SOLUTIONS WITH A QUADRATIC POTENTIAL IN STRING FRAME

2006 ◽  
Vol 21 (28n29) ◽  
pp. 5823-5831
Author(s):  
JAE-HYUK OH ◽  
YONGSUNG YOON
Keyword(s):  
Cosmological Constant ◽  
Flat Space ◽  
Brane World ◽  
Low Energy ◽  
Quadratic Potential ◽  
Brane Solution ◽  
Bulk Cosmological Constant ◽  
Potential Parameters ◽  
String Gravity ◽  
Bulk Space

We have examined brane world solutions for the low energy effective string gravity action coupled with a quadratic dilaton potential in string frame. For a negative bulk cosmological constant, static 3-brane solutions exist. Their properties are analyzed depending on the quadratic potential parameters. It is found that a brane solution in a curved bulk space in Einstein frame corresponds to a dilaton solution in flat space in string frame.

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