ar X iv : h ep - p h / 05 08 02 5 v 1 1 A ug 2 00 5 1 Superheavy dark matter and ultrahigh energy cosmic rays

ar X iv : a st ro - p h / 05 01 13 3 v 2 2 7 M ay 2 00 5 1 Ultrahigh energy cosmic rays from collisional annihilation revisited

We re-examine collisional annihilation of superheavy dark matter particles in dark matter density spikes in the galactic halo as a possible source of ultrahigh energy cosmic rays. We estimate the possible flux in a way that does not depend on detailed assumptions about the density profiles of dark matter clumps. The result confirms that collisional annihilation is compatible with annihilation c...

ar X iv : h ep - p h / 01 05 34 8 v 1 3 1 M ay 2 00 1 Ultrahigh energy cosmic rays as a Grand Unification signal

We analyze the spectrum of the ultrahigh energy (above ≈ 10 9 GeV) cosmic rays. With a maximum likelihood analysis we show that the observed spectrum is consistent with the decay of extragalactic GUT scale particles. The predicted mass for these superheavy particles is m X = 10 b GeV, where b = 14.6

ar X iv : h ep - p h / 06 08 05 0 v 1 4 A ug 2 00 6 Percolation and high energy cosmic rays above 10 17 eV

ar X iv : h ep - p h / 04 08 16 5 v 1 1 6 A ug 2 00 4 Lectures on Astroparticle Physics

These are extended notes of a series of lectures given at the XIth Brazilian School of Cosmology and Gravitation. They provide a selection of topics at the intersection of particle and astrophysics. The first part gives a short introduction to the theory of electroweak interactions, with specific emphasize on neutrinos. In the second part we apply this framework to selected topics in astrophysi...

ar X iv : h ep - p h / 04 08 16 5 v 1 16 A ug 2 00 4 Lectures on Astroparticle

These are extended notes of a series of lectures given at the XIth Brazilian School of Cosmology and Gravitation. They provide a selection of topics at the intersection of particle and astrophysics. The first part gives a short introduction to the theory of electroweak interactions, with specific emphasize on neutrinos. In the second part we apply this framework to selected topics in astrophysi...