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Degravitation of the Cosmological Constant and Graviton Width

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arxiv hep-th/0703027 v1 pith:JTPHIJ7N submitted 2007-03-05 hep-th astro-phhep-ph

Degravitation of the Cosmological Constant and Graviton Width

classification hep-th astro-phhep-ph
keywords constantdegravitationgravitonwidthabsencealreadycertaincharacteristic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study the possibility of decoupling gravity from the vacuum energy. This is effectively equivalent to promoting Newton's constant to a high-pass filter that degravitates sources of characteristic wavelength larger than a certain macroscopic (super) horizon scale L. We study the underlying physics and the consistency of this phenomenon. In particular, the absence of ghosts, already at the linear level, implies that in any such theory the graviton should either have a mass 1/L, or be a resonance of similar width. This has profound physical implications for the degravitation idea.

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