Cascading gravity and degravitation

Journal Article · Fri Feb 15 04:00:00 EST 2008 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2008/02/011· OSTI ID:22137787

De Rham, Claudia; Hofmann, Stefan; Khoury, Justin

We construct a cascading brane model of gravity in which the behavior of the gravitational force law interpolates from (n+4)-dimensional to (n+3)-dimensional all the way down to 4-dimensional from longer to shorter length scales. We show that, at the linearized level, this model exhibits the features necessary for degravitation of the cosmological constant. The model is shown to be ghost free with the addition of suitable brane kinetic operators, and we demonstrate this using a number of independent procedures. Consequently this is a consistent infrared (IR) modification of gravity, providing a promising framework for a dynamical, degravitating solution of the cosmological constant problem.

• OSTI ID: 22137787
• Journal Information: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 02 Vol. 2008; ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BRANES
COSMOLOGICAL CONSTANT
GRAVITATION
INFRARED RADIATION
MANY-DIMENSIONAL CALCULATIONS
MATHEMATICAL SOLUTIONS
STRING THEORY