On Dynamical Adjustment Mechanisms for the Cosmological Constant
High Energy Physics - Phenomenology
2007-05-23 v1
Abstract
After recalling why dynamical adjustment mechanisms represent a particularly attractive possibility for solving the cosmological constant problem, we briefly discuss their intrinsic difficulties as summarized in Weinberg's no-go theorem. We then comment on some problems of the recently proposed `self-tuning' mechanism in 4+1 dimensions. Finally, we describe an alternative approach which uses the time-evolution of the universe to achieve a dynamical relaxation of the cosmological constant to zero.
Keywords
Cite
@article{arxiv.hep-ph/0105315,
title = {On Dynamical Adjustment Mechanisms for the Cosmological Constant},
author = {A. Hebecker},
journal= {arXiv preprint arXiv:hep-ph/0105315},
year = {2007}
}
Comments
4 pages LaTeX, talk at PASCOS 2001, Chapel Hill, North Carolina, 10-15 April 2001