Zobrazeno 1 - 10
of 107
pro vyhledávání: '"Gazizov, a Z."'
Autor:
Berezinsky, V., Gazizov, A. Z.
Publikováno v:
Astrophys.J 669:684-691,2007
We consider the astrophysical implications of the diffusion equation solution for Ultra-High Energy Cosmic Rays (UHECR) in the expanding universe, obtained in paper I (V.Berezinsky & A.Gazizov, ApJ 643 (2006) 8). The UHECR spectra are calculated in a
Externí odkaz:
http://arxiv.org/abs/astro-ph/0702102
Autor:
Berezinsky, V., Gazizov, A. Z.
Publikováno v:
Astrophys.J.643:8-13,2006
We present an analytic solution to diffusion equation for high energy cosmic rays in the expanding universe. The particles are assumed to be ultra-relativistic and they can have energy losses arbitrarily dependent on energy and time. The obtained sol
Externí odkaz:
http://arxiv.org/abs/astro-ph/0512090
Publikováno v:
Phys.Lett.B612:147-153,2005
Ultrahigh energy (UHE) extragalactic protons propagating through cosmic microwave radiation (CMB) acquire the spectrum features in the form of the dip, bump (pile-up protons) and the Greisen-Zatsepin-Kuzmin (GZK) cutoff. We have performed the analysi
Externí odkaz:
http://arxiv.org/abs/astro-ph/0502550
We demonstrate that the energy spectra of Ultra High Energy Cosmic rays (UHECR) as observed by AGASA, Fly's Eye, HiRes and Yakutsk detectors, have the imprints of UHE proton interaction with the CMB radiation in the form of the dip at $E\sim 1\times
Externí odkaz:
http://arxiv.org/abs/astro-ph/0210095
Publikováno v:
Phys.Rev.D74:043005,2006
We argue that an astrophysical solution to UHECR problem is viable. The pectral features of extragalactic protons interacting with CMB are calculated in model-independent way. Using the power-law generation spectrum $\propto E^{-\gamma_g}$ as the onl
Externí odkaz:
http://arxiv.org/abs/hep-ph/0204357
Autor:
Gazizov, A. Z., Yanush, S. I.
Various implications of new, non-perturbative pomeron inspired enhancement of small-x neutrino-nucleon structure functions for high-energy neutrino astrophysics are discussed. At x larger than 10^{-5} these functions are given by perturbative QCD, wh
Externí odkaz:
http://arxiv.org/abs/astro-ph/0201528
Autor:
Gazizov, A. Z., Yanush, S. I.
Rapid growth of neutrino-nucleon cross-sections at high energies due to hypothetical hard pomeron enhancement of $\nu N$-structure functions is discussed. Differential and integral hadron moments, which, together with cross-sections, define rates of
Externí odkaz:
http://arxiv.org/abs/astro-ph/0112244
The energy losses and spectra of Ultra High Energy Cosmic Rays (UHECR) are calculated for protons as primary particles. The attention is given to the energy losses due to electron-positron production in collisions with the microwave 2.73 K photons. T
Externí odkaz:
http://arxiv.org/abs/hep-ph/0107306
Publikováno v:
In Proceedings of 9th Annual Seminar NPCS-2000, Minsk, Belarus (edt.'s L. Babichev and V. Kuvshivov) (2000) p. 304-309
By means of theory group analysis, some algebraic and geometrical properties of quaternion analogs of \emph{Julia} sets are investigated. We argue that symmetries, intrinsic to quaternions, give rise to the class of identical \emph{Julia} sets, which
Externí odkaz:
http://arxiv.org/abs/nlin/0105060
Autor:
Gazizov, A. Z., Yanush, S. I.
Publikováno v:
Phys.Rev. D65 (2002) 093003
An unknown small-x behavior of nucleon structure functions gives appreciable uncertainties to high-energy neutrino-nucleon cross-sections. We construct structure functions using at small x Regge inspired description by A. Donnachie and P. V. Landshof
Externí odkaz:
http://arxiv.org/abs/astro-ph/0105368