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Trans-Planckian particle creation in cosmology and ultrahigh energy cosmic rays

  • A. A. Starobinsky
  • I. I. Tkachev
Gravity, Astrophysics

Abstract

We consider observational constraints on the creation of particles induced by hypothetical trans-Planckian effects during the current stage of the Universe’s expansion. We show that compatibility with the diffuse γ-ray background measured by the EGRET experiment strongly restricts this creation. In particular, it rules out the possibility of detecting signatures of such short-distance effects in anisotropies of the cosmic microwave background radiation. On the other hand, the possibility that some part of ultrahigh-energy cosmic rays originates from new trans-Planckian physics remains open.

PACS numbers

98.80.Cq 98.70.Vc 04.62.+v 

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Copyright information

© MAIK "Nauka/Interperiodica" 2002

Authors and Affiliations

  • A. A. Starobinsky
    • 1
  • I. I. Tkachev
    • 2
  1. 1.Landau Institute for Theoretical PhysicsRussian Academy of SciencesMoscowRussia
  2. 2.Theory DivisionCERNGeneva 23Switzerland

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