A review arguing that technical naturalness, powered by low-energy scale invariance and supersymmetric extra dimensions, is the most promising route to solving the cosmological constant problem.
A Comment on Self-Tuning and Vanishing Cosmological Constant in the Brane World
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abstract
In this note we elaborate on various five dimensional contributions to the effective 4D cosmological constant in brane systems. In solutions with vanishing 5D cosmological constant we describe a non-local mechanism of cancellation of vacuum energy between the brane and the singularities. We comment on a hidden fine tuning which is implied by this observation.
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Dark Energy and the Symbiosis Between Micro-physics and Cosmology (Naturally)
A review arguing that technical naturalness, powered by low-energy scale invariance and supersymmetric extra dimensions, is the most promising route to solving the cosmological constant problem.