Cosmic-ray particles with energies in excess of 1020eV have been detected. The sources as
well as the physical mechanism (s) responsible for endowing cosmic-ray particles with such …

The authors define “ultrahigh-energy cosmic rays”(UHECRs) as those cosmic rays with
energies above 10 18 eV. It had been anticipated that there would be a cutoff in the energy …

If neutrinos are a significant contributor to the matter density of the universe, then they
should have∼ eV mass and cluster in galactic (super) cluster halos, and possibly in galactic …

In the first part of this review we discuss the basic observational features at the end of the
cosmic ray (CR) energy spectrum. We also present there the main characteristics of each of …

In this review we discuss the important progress made in recent years towards
understanding the experimental data on cosmic rays with energies≳ 1019 eV. We begin …

We argue that due to various restrictions cosmic strings and monopole-string networks are
not likely to produce the observed flux of ultrahigh energy cosmic rays (UHECR). Among the …

The low energy limit of QCD admits (crystals of) superconducting Baryonic tubes at finite
density. We begin with the Maxwell-gauged Skyrme model in (3+ 1)-dimensions (which is …

In this paper, we construct the first analytic examples of\((3+ 1)\)-dimensional self-gravitating
regular cosmic tube solutions which are superconducting, free of curvature singularities and …

We find new exact solutions of the Abelian-Higgs model coupled to general relativity,
characterized by a nonvanishing superconducting current. The solutions correspond to pp …

The current status of Ultra High Energy Cosmic Rays (UHECR) is reviewed, with emphasis
given to elementary particle solutions to UHECR problem, namely to Topological Defects …