Cosmic ray threshold in an asymptotically dS spacetime

Details Cosmic ray threshold in an asymptotically dS spacetime Cosmic ray threshold in an asymptotically dS spacetime

2005-05-31

arxiv.org/abs/astro-ph/0505612v1

Phys.Rev. D71 (2005) 103007

Astronomy and Astrophysics

Astrophysics

15 pages, 4 figures

Scientific paper

10.1103/PhysRevD.71.103007

We discuss the threshold anomaly in ultra-high energy cosmic ray physics by assuming that the matter world just be perturbation of a de Sitter universe, which is consistent with the recent astronomical observations: about two thirds of the whole energy in the universe is contributed by a small positive cosmological constant. One-particle states are presented explicitly. It is noticed that the dispersion relation of free particles is dependent on the degrees of freedom of angular momentum. This fact can be regarded as the effects of the cosmological constant on kinematics of particles.

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