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.
Preprint
Comment: 49 pages, 4 figures
Subjects: High Energy Physics - Theory; Astrophysics; High Energy Physics - Phenomenology