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Constraining the cosmic ray source spectrum from observations in the GZK regime / Kachelriess, M. (Norwegian U. Sci. Tech.) ; Parizot, E. (APC, Paris) ; Semikoz, D.V. (APC, Paris ; CERN ; Moscow, INR)
We present a method to constrain the injection spectrum of ultrahigh energy cosmic rays (UHECRs) from supposedly identified extragalactic sources, which can be applied even when only one or two events per source are observed, and is more efficient than a simple fit of the UHECR energy spectrum including only the contribution of all identified sources. The method is based on the analysis of the probability for a given source to populate different energy bins, depending on the actual CR injection spectral index. [...]
arXiv:0711.3635.- 2008 - 14 p. - Published in : JETP Lett. 88 (2009) 553-557 Fulltext: PDF; External link: Fulltext

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GZK Photons in the Ultra High Energy Cosmic Rays / Semikoz, D V
2005 Published version: PDF;
In : 29th International Cosmic Ray Conference, Pune, India, 3 - 10 Aug 2005, pp.79 (v.7)

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Bounds on heavy sterile neutrinos revisited / Kusenko, Alexander (UCLA, Los Angeles, CA, USA) ; Pascoli, Silvia (CERN ; Univ. Durham, Durham, UK) ; Semikoz, Dmitry V (APC, College de France, Paris, France ; INR RAS, Moscow, Russia)
2005 - Published in : JHEP 11 (2005) 028 SISSA/IOP Published version, local copy: PDF;

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Massive tau-neutrinos in the early universe / Semikoz, D V
1998
In : 10th International Seminar on High Energy Physics, v.2, Suzdal, Russian Federation, 17 - 24 May 1998, pp.308-312

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GZK Photons as Ultra High Energy Cosmic Rays / Gelmini, G ; Kalashev, O ; Semikoz, D V
We calculate the flux of "GZK-photons", namely the flux of Ultra High Energy Cosmic Rays (UHECR) consisting of photons produced by extragalactic protons through the resonant photoproduction of pions, the so called Greisen-Zatsepin-Kuzmin (GZK) effect. [...]
astro-ph/0506128 ; CERN-PH-TH-2007-173 ; UCLA-2004-TEP-17. - 2005. - 20 p.
Fulltext

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Supernova pointing with low- and high-energy neutrino detectors / Tomás, R (Munich, Max Planck Inst.) ; Semikoz, Dmitry V (Munich, Max Planck Inst.) ; Raffelt, Georg G (Munich, Max Planck Inst.) ; Kachelriess, M (Munich, Max Planck Inst.) ; Dighe, Amol S (Munich, Max Planck Inst.)
A future galactic SN can be located several hours before the optical explosion through the MeV-neutrino burst, exploiting the directionality of $nu$-$e$-scattering in a water Cherenkov detector such as Super-Kamiokande. We study the statistical efficiency of different methods for extracting the SN direction and identify a simple approach that is nearly optimal, yet independent of the exact SN neutrino spectra. [...]
hep-ph/0307050; MPP-2003-21.- Geneva : CERN, 2003 - 12 p. - Published in : Phys. Rev. D 68 (2003) 093013
- Published in : PoS: AHEP2003 (2003) , pp. 020 Published version from PoS: AHEP2003-020 - PDF; 020proc - PDF; External link: Fulltext
In : International Workshop on Astroparticle and High Energy Physics, Valencia, Spain, 14 - 18 Oct 2003, pp.020

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Photons as Ultra High Energy Cosmic Rays ? / Kalashev, Oleg E. (Moscow, INR) ; Kuzmin, V.A. (Moscow, INR) ; Semikoz, D.V. (Moscow, INR ; Munich, Max Planck Inst.) ; Tkachev, I.I. (Moscow, INR ; CERN)
We study spectra of the Ultra High Energy Cosmic Rays assuming primaries are protons and photons, and that their sources are extragalactic. [...]
astro-ph/0107130 ; MPI-PHT-2001-21 ; MPI-PhT-2001-21. - 2001. - 4 p.
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Standard Model Neutrinos as Warm Dark Matter / Giudice, Gian F. (CERN) ; Kolb, Edward W. (Fermilab ; Chicago U., EFI ; Chicago U. ; Pisa, Scuola Normale Superiore) ; Riotto, Antonio (Fermilab ; Chicago U., EFI ; Chicago U. ; Pisa, Scuola Normale Superiore) ; Semikoz, Dmitry V. (Munich, Max Planck Inst. ; Moscow, INR) ; Tkachev, Igor I. (Moscow, INR ; CERN)
Standard Model neutrinos are not usually considered plausible dark matter candidates because the usual treatment of their decoupling in the early universe implies that their mass must be sufficiently small to make them ``hot'' dark matter. In this paper we show that decoupling of Standard Model neutrinos in low reheat models may result in neutrino densities very much less than usually assumed, and thus their mass may be in the keV range. [...]
hep-ph/0012317; FERMILAB-PUB-00-317-A; SNS-PH-00-20; MPI-PHT-2000-49; FERMILAB-PUB-2000-317-A; MPI-PHT-2000-49; SNS-PH-2000-20.- Batavia, IL : FERMILAB, 2001 - 5 p. - Published in : Phys. Rev. D 64 (2001) 043512/1-5 APS Published version, local copy: PDF; Access to fulltext document: PDF; Fulltext: PDF; External link: Fermilab Library Server (fulltext available)

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