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CERN Document Server Encontrados 43 registros  1 - 10siguientefinal  ir al registro: La búsqueda tardó 0.58 segundos. 
1.
Is astronomy possible with neutral ultra-high energy cosmic ray particles existing in the Standard Model? / Tinyakov, P.G. (Brussels U. ; Moscow, INR) ; Tkachev, Igor I. (CERN ; Moscow, INR)
The recently observed correlation between HiRes stereo cosmic ray events with energies E ~ 10 EeV and BL Lacs occurs at an angle which strongly suggests that the primary particles are neutral. We analyze whether this correlation, if not a statistical fluctuation, can be explained within the Standard Model, i.e., assuming only known particles and interactions. [...]
astro-ph/0612359.- 2008 - 7 p. - Published in : J. Exp. Theor. Phys. 106 (2008) 481-487 Access to fulltext document: PDF; Fulltext: PDF; External link: astro-ph/0612359 PDF
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2.
Deflections of cosmic rays in a random component of the Galactic magnetic field / Tinyakov, P.G. (Brussels U. ; Moscow, INR) ; Tkachev, Igor I. (CERN ; Moscow, INR)
We express the mean square deflections of the ultra-high energy cosmic rays (UHECR) caused by the random component of the Galactic magnetic field (GMF) in terms of the GMF power spectrum and use recent measurements of the GMF spectrum to estimate them quantitatively. We find that deflections due to the random field typically constitute 0.03-0.3 of the deflections which are due to the regular component and depend on the direction on the sky. [...]
astro-ph/0411669.- 2005 - 7 p. - Published in : Astropart. Phys. 24 (2005) 32-43 Access to fulltext document: PDF; Fulltext: PDF; External link: astro-ph/0411669 PDF
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3.
Turbulent Thermalization / Micha, Raphael (ETH Zürich) ; Tkachev, Igor I (CERN ; Inst. Nucl. Res. of the Russian Academy of Sciences, Moscow, Russia)
We study, analytically and with lattice simulations, the decay of coherent field oscillations and the subsequent thermalization of the resulting stochastic classical wave-field. The problem of reheating of the Universe after inflation constitutes our prime motivation and application of the results. [...]
hep-ph/0403101.- 2004 - Published in : Phys. Rev. D 70 (2004) 043538 APS Published version, local copy: PDF; Access to fulltext document: PDF; External link: hep-ph/0403101 PDF
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4.
Preheating and Thermalization after Inflation / Micha, Raphael (Zurich, ETH) ; Tkachev, Igor I. (CERN ; Moscow, INR)
After a short review of inlationary preheating, we discuss the development of equilibrium in the frameworks of massless $\lambda \Phi^4$ model. It is shown that the process is characterised by the appearance of Kolmogorov spectra and the evolution towards thermal equilibrium follows self-similar dynamics. [...]
hep-ph/0301249.- 2003 - 10 p. - Published in : 10.1142/9789812704498_0020 Fulltext: PDF; External link: hep-ph/0301249 PDF
In : Workshop on Strong and Electroweak Matter, Heidelberg, Germany, 2 - 5 Oct 2002, pp.210-219
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5.
Cuts and penalties : comment on "The clustering of ultra-high energy cosmic rays and their sources" / Tinyakov, Peter G ; Tkachev, Igor I (CERN)
In a series of papers we have found statistically significant correlations between arrival directions of ultra-high energy cosmic rays and BL Lacertae objects. Recently, our calculations were partly repeated by Evans, Ferrer and Sarkar with the same result but different conclusions. [...]
astro-ph/0301336.- Geneva : CERN, 2003 - 5 p. - Published in : Phys. Rev. D 69 (2003) 128301 APS Published version, local copy: PDF; Access to fulltext document: PDF; External link: astro-ph/0301336 PDF
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6.
Relativistic Turbulence : A Long Way from Preheating to Equilibrium / Micha, R ; Tkachev, Igor I
We study, both numerically and analytically, the development of equilibrium after preheating. We show that the process is characterised by the appearance of Kolmogorov spectra and the evolution towards thermal equilibrium follows self-similar dynamics. [...]
hep-ph/0210202.- Geneva : CERN, 2003 - 4 p. - Published in : Phys. Rev. Lett. 90 (2003) 121301 APS Published version, local copy: PDF; Access to fulltext document: PDF; External link: hep-ph/0210202 PDF
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7.
Trans-Planckian Particle Creation in Cosmology and Ultra-High Energy Cosmic Rays / Starobinsky, Alexei A. (Landau Inst.) ; Tkachev, Igor I. (CERN)
We consider observational constraints on creation of particles induced by hypothetical trans-Planckian effects during the current stage of the Universe expansion. We show that compatibility with the diffuse gamma-ray background measured by the EGRET experiment strongly restricts this creation. [...]
astro-ph/0207572.- Geneva : CERN, 2002 - 5 p. - Published in : JETP Lett. 76 (2002) 235-239 Access to fulltext document: PDF; Fulltext: PDF; External link: astro-ph/0207572 PDF
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8.
Tracing protons through the Galactic magnetic field : a clue for charge composition of ultra-high energy cosmic rays / Tinyakov, Peter G ; Tkachev, Igor I
We reconstruct the trajectories of ultra-high energy cosmic rays (UHECR) - observed by the AGASA experiment - in the Galactic magnetic field assuming that all particles have the same charge. We then study correlations between the reconstructed events and BL Lacs. [...]
astro-ph/0111305; CERN-TH-2001-320.- Geneva : CERN, 2002 - 6 p. - Published in : Astropart. Phys. 18 (2002) 165-172 Access to fulltext document: PDF; External link: astro-ph/0111305 PDF - CERN library copies
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9.
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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10.
Dynamics of Symmetry Breaking and Tachyonic Preheating / Felder, G ; García-Bellido, J ; Greene, P B ; Kofman, L A ; Linde, Andrei D ; Tkachev, Igor I
We reconsider the old problem of the dynamics of spontaneous symmetry breaking using 3d lattice simulations, and develop a theory of tachyonic preheating, which occurs due to the spinodal instability of the scalar field. Tachyonic preheating is so efficient that symmetry breaking typically completes within a single oscillation of the field distribution as it rolls towards the minimum of its effective potential. [...]
hep-ph/0012142; CERN-TH-2000-365; CITA-2000-60; FTUAM-2000-26; IFT-UAM-CSIC-2000-40; PACS-98-80; SU-ITP-2000-35.- Geneva : CERN, 2001 - 7 p. - Published in : Phys. Rev. Lett. 87 (2001) 011601 APS Published version, local copy: PDF; Access to fulltext document: PDF; External link: hep-ph/0012142 PDF - CERN library copies
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CERN Document Server : Encontrados 43 registros   1 - 10siguientefinal  ir al registro:
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