Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-07-23
Phys.Lett. B578 (2004) 247-252
Astronomy and Astrophysics
Astrophysics
10 pages, revtex4
Scientific paper
The production of ultra high-energy cosmic rays in de Sitter invariant vacuum states is considered. Assuming the present-day universe is asymptoting toward a future de Sitter phase, we argue the observed flux of cosmic rays places a bound on the parameter $\alpha$ that characterizes these de Sitter invariant vacuum states, generalizing earlier work of Starobinsky and Tkachev. If this bound is saturated, we obtain a new top-down scenario for the production of super-GZK cosmic rays. The observable predictions bear many similarities to the previously studied scenario where super-GZK events are produced by decay of galactic halo super-heavy dark matter particles.
Alberghi Gian Luigi
Goldstein Kevin
Lowe David A.
No associations
LandOfFree
Ultra High Energy Cosmic Rays and de Sitter Vacua does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Ultra High Energy Cosmic Rays and de Sitter Vacua, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultra High Energy Cosmic Rays and de Sitter Vacua will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-367168