The effective Lagrangian for massless quarks in an external non-Abelian chromomagnetic field
The effective Lagrangian for massless quarks in an external non-Abelian chromomagnetic field
B.V. Magnitskii, A.V. Tatarintsev
Effective Lagrangian have been derived for massless quarks at nonzero temperatures. Cases are considered of two different configurations for the chromomagnetic field and particle isospins I = 0, 1/2.
Show AbstractThe Higgs vacuum in gravitational theory
The Higgs vacuum in gravitational theory
G.A. Saradanashvili, B.L. Ikhlov
A gravitational field is described as a Higgs-Goldstone field in gauge theory, and a prediction is made of the existence of Higgs gravitational vacuum, for which a model is constructed, whose material source is provided by the Higgs vacuum for material fields.
Show AbstractTest-oscillator sensitivity in continuous tracking of the number of quanta
Test-oscillator sensitivity in continuous tracking of the number of quanta
F.Ya. Khalili
A study is made of observing the classical external force acting on a quantum test oscillator to which is connected a system for continuously tracking the number of quanta. It is shown that the reaction of the tracking system does not reduce the sensitivity if the signalisolation time is greater than the time of force action.
Show AbstractA method of calculating resonant-state parameters in multichannel Coulomb-nuclear scattering
A method of calculating resonant-state parameters in multichannel Coulomb-nuclear scattering
A.N. Safronov
An extension of Lande's method is proposed that enables one to distinguish Coulomb singularities in the multichannel Lippman-Schwinger equations on the nonphysical sheets in the complex energy plane. A system of linear algebraic equations is derived whose solutions define the model-independent parameters of the resonant states in Coulomb-nuclear scattering.
Show AbstractThe phase motion in a classical microtron near nonlinear resonances
The phase motion in a classical microtron near nonlinear resonances
V.K. Grishin, M.A. Sotnikov, V.I. Shvedunov
Analytical and numerical studies are made on the phase motion in a classical microtron. Calculations are given on the regions of stable phase oscilation for various equilibrium phases. The fourth-order resonance represents a hazard, which leads to bunch break-up, and this may require the optimum equilibrium phase choice.
Show AbstractScaling violation in a quasieikonal model for a supercritical pomeron
Scaling violation in a quasieikonal model for a supercritical pomeron
M.Z. Iofa, A.E. Pukhov
Calculations have been performed on Feynman scaling breaking in $pA\to hX$ processes for incident particle energies $E=5\cdot 10^3-5\cdot 10^9$ GeV for $h=p$ or $\pi^{\pm}$ and $A = ^1H$ or $^{14}N$. The theoretical model for the strong interactions is a quasieikonal model for a supercr1tical pomeron.
Show AbstractA modification of the Brinkman-Kramers approximation incorporating Coulomb distortions
A modification of the Brinkman-Kramers approximation incorporating Coulomb distortions
Yu.A. Shurygina, M.I. Karbovanets, A.M. Popova, Ya.A. Teplova
A modification has been made to the Brinkman-Kramers approximation on the basis of the distorted-wave method, which enables one to represent the electron-capture cross section as the product of the BKA cross section and the coefficients $\alpha$ and $\beta$ describing the distortion of the electron wave functions due to interaction with the target atom in the exit channel and with the incident ion in the ingoing channel correspondingly. It is shown to be important to incorporate the distortions in the two channels at low and medium energies.
Show AbstractDiffraction tomography in the Fresnel zone
Diffraction tomography in the Fresnel zone
V.E. Kunitsyn
Tomographic refractive-index reconstruction is considered with allowance for weak refraction and diffraction effects within the framework of wave-theory approximations: the smooth-perturbation method and the Born approximation. The Fresnel small-angle approximation is used to obtain a comparatively simple algorithms for processing the field and reducing the diffraction-tomography treatment to traditional tomographic reconstruction from linear integrals.
Show AbstractA saturation effect in a photoexcited degenerate semiconductor
A saturation effect in a photoexcited degenerate semiconductor
L.V. Vasil'eva, T.M. Il'inova, G.A. Cherdyntseva
Saturation is considered for a semiconductor resonantly excited by a light pulse of duration greater than the time required to produce a degenerate Fermi distribution. Analytic expressions are derived for a carrier concentration, mean energy, and position of the Fermi quasilevel. The cases of heavy and light holes are considered.
Show AbstractEffects of charged defects in a system formed by a semiconductor with a molecular-film insulator on the fluorescence spectra of adsorbed molecules
Effects of charged defects in a system formed by a semiconductor with a molecular-film insulator on the fluorescence spectra of adsorbed molecules
V.A. Bespalov, V.E. Drozd, L.V. Levshin, G.S. Plotnikov, A.M. Saletskii, V.I. Yuzhakov
A study has been made on the effects of charged local defects on the fluorescence spectra of erythrosine adsorbed on structures of semiconductor with molecularly deposited insulators ($HfO_2, TiO_2, Nb_2O_5 , V_2O_5 , Cr_2O_3$). Spectrum-shift effects have been observed in the fields of charged centers with differing signs and natures.
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