Foundations of Physics 39 (1):1-19 (2009)

Abstract
The Poincaré group generalizes the Galilei group for high-velocity kinematics. The de Sitter group is assumed to go one step further, generalizing Poincaré as the group governing high-energy kinematics. In other words, ordinary special relativity is here replaced by de Sitter relativity. In this theory, the cosmological constant Λ is no longer a free parameter, and can be determined in terms of other quantities. When applied to the whole universe, it is able to predict the value of Λ and to explain the cosmic coincidence. When applied to the propagation of ultra-high energy photons, it gives a good estimate of the time delay observed in extragalactic gamma-ray flares. It can, for this reason, be considered a new paradigm to approach the quantum gravity problem
Keywords de Sitter relativity  Cosmological constant  Quantum gravity
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DOI 10.1007/s10701-008-9258-5
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The Theory of Relativity.C. Møller - 1972 - Oxford, Clarendon Press.

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