Constraining the braneworld with gravitational wave observations

Some braneworld models may have observable consequences that, if detected, would validate a requisite element of string theory. In the infinite Randall-Sundrum model (RS2), the AdS radius of curvature, l, of the extra dimension supports a single bound state of the massless graviton on the brane, the...

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Bibliographic Details
Published in:Physical review letters 2010-04, Vol.104 (14), p.141601-141601, Article 141601
Main Author: McWilliams, Sean T
Format: Article
Language:English
Subjects:
ANTENNAS
ANTI DE SITTER SPACE
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BLACK HOLES
BOUND STATE
BRANES
COMPOSITE MODELS
CONFORMAL INVARIANCE
ELECTRICAL EQUIPMENT
ELECTRONIC EQUIPMENT
EXTENDED PARTICLE MODEL
FIELD THEORIES
GRAVITATION
GRAVITATIONAL WAVES
INTERFEROMETRY
INVARIANCE PRINCIPLES
M-THEORY
MANY-DIMENSIONAL CALCULATIONS
MATHEMATICAL MODELS
MATHEMATICAL SPACE
PARTICLE MODELS
QUANTUM FIELD THEORY
QUARK MODEL
RADIO EQUIPMENT
RADIO TELESCOPES
SPACE
STRING MODELS
STRING THEORY
TELESCOPES
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Summary:Some braneworld models may have observable consequences that, if detected, would validate a requisite element of string theory. In the infinite Randall-Sundrum model (RS2), the AdS radius of curvature, l, of the extra dimension supports a single bound state of the massless graviton on the brane, thereby reproducing Newtonian gravity in the weak-field limit. However, using the AdS/CFT correspondence, it has been suggested that one possible consequence of RS2 is an enormous increase in Hawking radiation emitted by black holes. We utilize this possibility to derive two novel methods for constraining l via gravitational wave measurements. We show that the EMRI event rate detected by LISA can constrain l at the approximately 1 microm level for optimal cases, while the observation of a single galactic black hole binary with LISA results in an optimal constraint of l < or = 5 microm.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.104.141601