Photoformation of electron-positron pairs in an external magnetic field

1968 ◽  
Vol 11 (2) ◽  
pp. 27-28
Author(s):  
B. A. Lysov ◽  
O. F. Dorofeev ◽  
O. S. Pavlova
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Electron Positron

Oblique Propagation of Electrostatic Waves in a Magnetized Electron-Positron-Ion Plasma in the Presence of Heavy Particles

2018 ◽  
Vol 73 (6) ◽  
pp. 501-509 ◽  
Author(s):  
M. Sarker ◽  
M. R. Hossen ◽  
M. G. Shah ◽  
B. Hosen ◽  
A. A. Mamun
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Solitary Wave Solution ◽  
Heavy Ion ◽  
Nonlinear Propagation ◽  
Heavy Particles ◽  
Ion Plasma ◽  
Electron Positron ◽  
Electrons And Positrons ◽  
Basic Features

AbstractA theoretical investigation is carried out to understand the basic features of nonlinear propagation of heavy ion-acoustic (HIA) waves subjected to an external magnetic field in an electron-positron-ion plasma that consists of cold magnetized positively charged heavy ion fluids and superthermal distributed electrons and positrons. In the nonlinear regime, the Korteweg-de Vries (K-dV) and modified K-dV (mK-dV) equations describing the propagation of HIA waves are derived. The latter admits a solitary wave solution with both positive and negative potentials (for K-dV equation) and only positive potential (for mK-dV equation) in the weak amplitude limit. It is observed that the effects of external magnetic field (obliqueness), superthermal electrons and positrons, different plasma species concentration, heavy ion dynamics, and temperature ratio significantly modify the basic features of HIA solitary waves. The application of the results in a magnetized EPI plasma, which occurs in many astrophysical objects (e.g. pulsars, cluster explosions, and active galactic nuclei) is briefly discussed.

Two-photon electron-positron annihilation in an external magnetic field

1968 ◽  
Vol 11 (3) ◽  
pp. 16-19
Author(s):  
I. M. Ternov ◽  
B. A. Lysov ◽  
O. F. Dorofeev ◽  
O. S. Pavlova
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Positron Annihilation ◽  
Two Photon ◽  
Electron Positron Annihilation ◽  
Electron Positron

scholarly journals Equilibrium electric current of massive electrons with anomalous magnetic moments induced by a magnetic field and the electroweak interaction with matter

2018 ◽  
Vol 33 (26) ◽  
pp. 1850154 ◽  
Author(s):  
Maxim Dvornikov
Keyword(s):  
Magnetic Field ◽  
Exact Solution ◽  
External Magnetic Field ◽  
Electric Current ◽  
Magnetic Moments ◽  
Electroweak Interaction ◽  
External Fields ◽  
Electron Positron ◽  
Electrons And Positrons ◽  
A Current

We study the possibility of the existence of the electric current, formed by massive electrons and positrons, flowing along an external magnetic field. The charged fermions are supposed to have nonzero anomalous magnetic moments and electroweakly interact with background matter. The expression for the current is obtained on the basis of the exact solution of the Dirac equation in the corresponding external fields. We demonstrate that, in the state of equilibrium, such a current is vanishing for any characteristics of the electron–positron plasma as well as the external fields. Our results are compared with the recent findings of other authors.

scholarly journals Thermal behavior change in the self-focusing of an intense laser beam in magnetized electron-ion-positron plasma

2014 ◽  
Vol 32 (2) ◽  
pp. 321-330 ◽  
Author(s):  
N. Sepehri Javan ◽  
M. Hosseinpour Azad
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Laser Beam ◽  
Fluid Model ◽  
The Self ◽  
Intense Laser ◽  
Hot Electron ◽  
Circularly Polarized ◽  
Self Focusing ◽  
Electron Positron

AbstractSelf-focusing of an intense circularly-polarized laser beam in a hot electron-positron-ion magneto-plasma is studied. Using a relativistic fluid model, nonlinear equation describing laser-plasma interaction in the quasi-neutral approximation is derived. Expanding nonlinear current density in terms of normalized vector potential and saving only the parabolic terms, we investigated the self-focusing phenomenon for right- and left-hand circularly polarized laser beams. The evolution of laser beam spot size with Gaussian profile is considered. Effects of the external magnetic field, fraction of electron-positron pairs, and also the kind of polarization on the self-focusing property are studied. It is shown that a mixture of electron-positron pairs to the ion-electron plasma modifies the behavior of plasma with respect to the external magnetic field.

scholarly journals a→e+e- DECAY IN A MODEL WITH INDUCED COUPLING TO LEPTONS

1998 ◽  
Vol 13 (04) ◽  
pp. 321-326 ◽  
Author(s):  
N. V. MIKHEEV ◽  
O. S. OVCHINNIKOV ◽  
L. A. VASSILEVSKAYA
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Pair Production ◽  
Landau Levels ◽  
Electron Positron ◽  
Electron Positron Pair

The process of electron–positron pair production by axion propagating in an external magnetic field is investigated in a model with only induced axion coupling to leptons. Contributions of the lowest and higher Landau levels are analyzed. The results we have obtained demonstrate a strong catalyzing influence of the field.

scholarly journals Dark and grey electromagnetic electron-cyclotron envelope solitons in an electron-positron magnetoplasma

2009 ◽  
Vol 75 (5) ◽  
pp. 575-580 ◽  
Author(s):  
P. K. SHUKLA ◽  
R. BINGHAM ◽  
A. D. R. PHELPS ◽  
L. STENFLO
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Wave ◽  
External Magnetic Field ◽  
Wave Packet ◽  
Electron Cyclotron ◽  
Envelope Soliton ◽  
Circularly Polarized ◽  
Envelope Solitons ◽  
Electron Positron ◽  
Cubic Nonlinear Schrödinger Equation

AbstractWe present an investigation of the amplitude modulation of an external magnetic field-aligned right-hand circularly polarized electromagnetic electron-cyclotron (EMEC) wave in a strongly magnetized electron-positron plasma. It is shown that the dynamics of the modulated EMEC wave packet is governed by a cubic nonlinear Schrödinger equation. The latter reveals that a modulated wave packet can propagate in the form of either a dark or a grey envelope soliton. This result could have relevance to the transport of electromagnetic wave energy over long distances via envelope solitons in the magnetospheres of pulsars and magnetars.

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