'TeV Gamma-ray Crisis' and an Anisotropic Space Model

Details 'TeV Gamma-ray Crisis' and an Anisotropic Space Model 'TeV Gamma-ray Crisis' and an Anisotropic Space Model

2004-04-30

arxiv.org/abs/astro-ph/0404595v1

Astronomy and Astrophysics

Astrophysics

16 pages, 4 figures

Scientific paper

To solve the `TeV gamma crisis', we examine a model whose one spatial direction is discretized at a high energy scale. Assuming the standard extra-galactic IR photon distribution, we evaluate the mean free-path of a energetic photon which acquires an effective mass in the model. For a wide range of the value of the lattice energy scale between a few TeV and around $10^{10}$ GeV, the mean free-path of a TeV energy photon can be enlarged enough to solve the `crisis'. Taking into account the effects of the universe expansion, we find bounds of the lattice constant.

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