[en] Hawking radiation of charged Dirac particles near the event horizons of the general spherically symmetric and non-static black holes is studied. The equation determining the location of event horizon, the radiation temperature function and the Hawking thermal spectrum formula are obtained

[en] The electromagnetic field due to the rotation of a circular singular magnetic flux-line is calculated. Averaging the resulting electric field over the period of rotation it is shown that by this procedure neither a static Coulumb charge nor an electric dipole moment can be generated. (Author)

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No abstract available

[en] Polarization effects in e⁺e^- belonging to BB processes are investigated from various aspects. The explicit form of vector polarization components of the created baryon B and components of the tensor of polarization components of the created baryon B and components of the tensor of polarization correlations of B and B in the annihilation of unpolarized and polarized e⁺e^- colliding beams is presented. The sensitivity in the behaviour of the vector polarization components of the nucleon is demonstrated graphically by using two recent formulations of the unitary and analytic VMD model of the nucleon electromagnetic structure

[en] A quantum-mechanical system of N spin-1/2 identical particles, where γ matrices anticommute for different particles, is shown to escape the procedure of the second quantization (in the physical space). Instead, a quantization procedure in the Fock configurational space, called here the third quantization, is outlined. The respective particles are reffered to as the non-Abelian Dirac particles. A system of N such particles, tightly concentrated around its centre of mass, can always be described in the pointlike limit by the Dirac equation corresponding to a composite, reducible (for N > 1) representation of the Dirac algebra. According to a previous author's discussion such representations with N = 1,3,5 may be responsible for the puzzling phenomenon of three fermion generations, if an intrinsic exclusion principle is introduced. (author)

[en] A rigorous extraction of the deuteron charge form factors from tensor polarization data in elastic electron-deuteron scattering, at given values of the 4-momentum transfer, is presented. Then the world data for elastic electron-deuteron scattering is used to parameterize, in three different ways, the three electromagnetic form factors of the deuteron in the 4-momentum transfer range 0-7 fm. This procedure is made possible with the advent of recent polarization measurements. The parameterizations allow a phenomenological characterization of the deuteron electromagnetic structure. They can be used to remove ambiguities in the form factors extraction from future polarization data

No abstract available

[en] One dimensional particle states are constructed according to orthogonality conditions, without requiring boundary conditions. Flee particle states are constructed using Dirac's delta function orthogonality conditions. The states (doublets) de- pend on two quantum numbers: energy and parity ('+' or '-'). With the aid of projection operators the particles are confined to a constrained region -a_jx_ja, in a way similar to the action of an infinite well potential. From the resulting over complete basis only the mutually orthogonal states are selected. Pour solutions are Sound, corresponding to different non-commuting Hamiltonians. Their energy eigen- states are labeled with the main quantum number n and parity ('+' or '-') . The energy eigenvalues are functions of n only. The four cases correspond to different boundary conditions: (I) the wave function vanishes on the boundary (energy levels: 1+,2-,3+,4-,) , (II) the derivative of the wavefunction vanishes on the boundary (energy levels 0+, 1-, 2+, 3-,) , (III) periodic, symmetric boundary conditions (energy levels: 0+,2+,2-,4+,4-6+,6-,) , (IV) periodic, antisymmetric boundary conditions (energy levels: 1+, 1-, 3+, 3-, 5+, 5-,). Orthogonality seems to be a more basic requirement than boundary conditions. By using projection operators, confinement of the particle to a definite region can be achieved in a simple and unambiguous way, and physical operators can be written so that they act only in the confined region

[en] A rigorous extraction of the deuteron charge form factors from tensor polarization data in elastic electron-deuteron scattering, at given values of the 4-momentum transfer, is presented. Then the world data for elastic electron-deuteron scattering is used to parameterize, in three different ways, the three electromagnetic form factors of the deuteron in the 4-momentum transfer range 0-7 fm. This procedure is made possible with the advent of recent polarization measurements. The parameterizations allow a phenomenological characterization of the deuteron electromagnetic structure. They can be used to remove ambiguities in the form factors extraction from future polarization data