I. F. Ginzburg

Publications (88) View all

• Article: Regge trajectories in QCD

  A. V. Efremov, I. F. Ginzburg, A. V. Radyushkin
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  ABSTRACT: We discuss some problems concerning the application of perturbative QCD to high energy soft processes. We show that summing the contributions of the lowest twist operators for non-singlet $t$-channel leads to a Regge-like amplitude. Singlet case is also discussed.
  11/2012;
• Article: Light charged Higgs at LHC

  I. F. Ginzburg
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  ABSTRACT: The LHC program for discovery of light charged Higgs with mass 135-180 GeV has to take into account decay $H^+\to \bar{b}\,t^*\to W^+b\bar{b}$. The distribution of decay products in effective mass of $t^*=Wb$ is obtained.
  05/2012;
• Article: The evolution of states and phase transitions under cooling of the early universe within the two-Higgs-doublet model

  I. F. Ginzburg, I. P. Ivanov, K. A. Kanishchev
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  ABSTRACT: The two-Higgs-doublet model (2HDM) realizes ground states (vacuum) with different properties for different parameter values. The parameters of the effective potential change during cooling of the Universe after the Big Bang. In so doing, the properties of vacuum state can be affected, phase transitions take place. The evolution of phase states and the set of phase transitions can turn out to be much wider than those accounted for within the conventional Standard model (SM) with a single Higgs doublet. The phase history of the Universe is analyzed for any specified set of the 2HDM parameters. All possible variants of the history are considered. Sets of modern, observed, in principle, parameters corresponding to different sequences of thermal phase transitions are determined. Possible cosmological consequences are briefly discussed. KeywordsHiggs models-vacuum-phase transitions-evolution of the Universe
  Russian Physics Journal 04/2012; 53(6):575-600. · 0.41 Impact Factor
• Article: Large contribution of virtual Delbrück scattering to the emission of photons by relativistic nuclei in nucleus–nucleus and electron–nucleus collisions

  I.F. Ginzburg, U.D. Jentschura, V.G. Serbo
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  ABSTRACT: Delbrück scattering is the elastic scattering of a photon in the Coulomb field of a nucleus via a virtual electron loop. The contribution of this virtual subprocess to the emission of a photon in the collision of ultra-relativistic nuclei, Z1Z2→Z1Z2γ, is considered. We identify the incoming virtual photon as being generated by one of the relativistic nuclei involved in the binary collision and the scattered photon as being emitted in the process. The energy and angular distributions of the photons are calculated. The discussed process has no infrared divergence. The total cross section obtained is 14barn for Au–Au collisions at the RHIC collider and 50barn for Pb–Pb collisions at the LHC collider. These cross sections are considerably larger than those for ordinary tree-level nuclear bremsstrahlung in the considered photon energy range, me⪡Eγ⪡meγ, where γ is the Lorentz factor of the nucleus. Finally, photon emission in electron–nucleus collisions, eZ→eZγ, is discussed in the context of the eRHIC option.
  European Physical Journal C 04/2012; 54(2):267-276. · 3.63 Impact Factor
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  Article: Simple and robust method for search Dark Matter particles and measuring their properties at ILC in various models of DM

  I. F. Ginzburg
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  ABSTRACT: I suggest simple method for the search of Dark Matter particles and some related particles which allows to measure reliably their mass and spin in a wide class of models for Dark Matter.
  10/2010;