2009•Journal of Experimental and Theoretical PhysicsOpen access

Double pair production by ultra-high-energy cosmic ray photons

S. V. Demidov, O. Kalashev

Abstract

Using the CompHEP package, we provide a detailed estimate of the influence of double e + e − pair production (DPP) by photons on the propagation of ultra-high-energy electromagnetic cascades. We show that in the models where the cosmic ray photon energy reaches a few 103 EeV, a refined DPP analysis may lead to a substantial difference in the predicted photon spectrum compared to the previous rough estimates.

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Key concepts: Physics, Photon, Pair production, Cosmic ray, COSMIC cancer database, Energy (signal processing), Production (economics), Astrophysics