Some Current Theoretical Issues around Ultra-High Energy Cosmic Rays

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dc.creatorSigl, Guenter
dc.date2004-04-03
dc.date.accessioned2026-07-07T02:12:50Z
dc.date.available2026-07-07T02:12:50Z
dc.descriptionWe address some current theoretical issues around ultra-high energy cosmic rays. We recall that scenarios producing more gamma-rays than cosmic rays up to high redshift can in general only provide a sub-dominant contribution to the ultra-high energy cosmic ray flux. This includes extra-galactic top-down and the Z-burst scenarios. Finally we discuss the influence of large scale cosmic magnetic fields on ultra-high energy cosmic ray propagation which is currently hard to quantify. The views presented here represent the authors perspective.
dc.description17 latex pages, 5 ps figures included, review given at the 2004 Cracow Epiphany Conference on Astroparticle Physics, to appear in the proccedings in Acta Physica Polonica B
dc.identifierhttps://arxiv.org/abs/astro-ph/0404074
dc.identifierhttp://arxiv.org/abs/astro-ph/0404074
dc.identifierActa Phys.Polon. B35 (2004) 1845-1862
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/7591
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSome Current Theoretical Issues around Ultra-High Energy Cosmic Rays
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