ЖЭТФ, Том 135,
Вып. 5,
стр. 878 (Май 2009)
(Английский перевод - JETP,
Vol. 108, No 5,
p. 764,
May 2009
доступен on-line на www.springer.com
)
DOUBLE PAIR PRODUCTION BY ULTRA-HIGH-ENERGY COSMIC RAY PHOTONS
Demidov S.V., Kalashev O.E.
Поступила в редакцию: 22 Декабря 2008
PACS: 13.85.Tp, 96.50.sh, 96.50.sb
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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