Showing papers in "Jetp Letters in 1982"

Limiting density of matter as a universal law of nature

Abstract: It is suggested that the density of matter in nature is always less than or equal to a certain value rho/sub q/, which is constructed from universal constants: rho/sub q/ = c/sup 5//kappa/sup 2/happrox.10/sup 94/ g/cm/sup 3/. As an example, a modified Einstein equation is derived which, at a low density of matter, rho<

Possibility of detecting relict massive neutrinos

Abstract: The coherent intensification of the interaction of relict massive neutrinos with grains of matter with a size on the order of the neutrino wavelength suggests that it might be possible to detect a galactic neutrino sea by virtue of the mechanical pressure which it exerts in the direction opposite that in which the solar system is moving in the galaxy.

Restrictions imposed on light scalar particles by measurements of van der Waals forces

Abstract: Analysis of direct measurements of van der Waals forces yields restrictions on the mass of light scalar particles and the coupling constant for the coupling of these particles with fermions. For the scalar particles of the supersymmetry theory (the scalar axion) the scale of a supersymmetry violation would be restricted to M/sup 2/>10/sup 6/ GeV/sup 2/.

Stimulated Mandel'shtam-Brillouin scattering in a multimode glass fiber lightguide

Abstract: An upper limit of 5 x 10/sup -7/ mb/sr has been found for the cross section for production of the nucleus /sup 10/He in the reaction /sup 232/Th+/sup 11/B (89 MeV).

Nonintegrability of the classical yang-mills fields

Abstract: It is shown for the particular case of the classical Yang-Mills equations that there is no additional first integral It is concluded that the original system of equations does not have a complete set of integrals

Observation of Andreev reflection with the help of transverse electron focusing

Abstract: Experimental results on the direct observation of Andreev reflection with the help of transverse electron focusing (EF) are presented (Ref. 1).

Order-(incommensurable disorder) phase transitions

Abstract: In first-order phase transitions in magnetic materials exhibiting a high-order spin, the short-range-order vector above the transition point may be incommensurable with the long-range-order vector below the transition point This theoretical result explains some experiments on UAs Some other materials which may exhibit this effect are pointed out

Theory for the thermopolarization effect in dielectrics having a center of inversion

Abstract: Note: Gurevich, Vl Af Ioffe Engn Phys Inst,Leningrad,UssrPc027Times Cited:2Cited References Count:5 Reference LC-ARTICLE-1982-002 Record created on 2006-08-21, modified on 2017-11-27

Measurements of the form factor of the neutral kaon from 1.06 to 1.40 GeV

Abstract: The cross section for the reaction e/sup +/e..-->..K/sub S/K/sub L/ has been measured between 1.06 and 1.4 GeV for the first time. The results show that the data on the electromagnetic form factors of the charged and neutral kaons are not described by the vector dominance model with rho, ..omega.., and phi mesons, but they can be explained by allowing for contributions of rho'(1600) and phi'(1650).

Superconductivity of cecu2si2

Abstract: Abstract Resistivity measurements of CeCu 2 Si 2 are carried out under pressures p up to 12 kbars. Unlike polycrystalline samples, no traces of superconductivity have been observed in CeCu 2 Si 2 at ambient pressure. When pressure is applied, CeCu 2 Si 2 monocrystals become superconducting with anomalously large ratio H c2 (0)/T c (0) = 34 K0e/K and with the derivative dH c2 /dT(T=T c ) = 140 K0e/K

Conversion of an atomic electron into a positron and double. beta. /sup +/ decay

Abstract: The probability for the conversion of an atomic electron into a positron should exceed the probability for 2..beta../sup +/ decay in all nuclei. The calculated ratio of probabilities does not depend on the nuclear model; for most nuclei it is approx.10 for conversion without neutrinos and approx.10/sup 3/ for two-neutrino processes.

Possible new long-range interaction and methods for detecting it

Abstract: The possible existence of a stable, massless, 0/sup - +/ Goldstone particle exhibiting a semiweak interaction with fermions (an arion) is discussed. An arionic long-range interaction could be detected by any method suitable for detecting a weak magnetic field in an experiment with oriented spins, if the magnetic field produced by these spins is suppressed by a superconducting shield.

Dynamic SO(3,1) symmetry of a Dirac magnetic monopole

Abstract: New integrals of motion are derived for a classical charged spin-zero particle in the field of a Dirac magnetic monopole. These integrals of motion generate, along with the angular momentum integrals, the SO(3,1) algebra of Poisson brackets. This symmetry may be related to the structure of the amplitude for the scattering of a quantized particle.