Dirac states of relativistic electrons channeled in a crystal and high-energy channeling electron-positron pair production by photons

The process of resonant high-energy electron–positron pair production by an ultrarelativistic electron colliding with the field of an X-ray pulsar is theoretically investigated. Resonant kinematics of the process is studied in detail. Under the resonance condition, the intermediate virtual photon in the X-ray pulsar field becomes a real particle. As a result, the initial process of the second order in the fine structure constant effectively reduces into two successive processes of the first order: X-ray-stimulated Compton effect and X-ray-stimulated Breit–Wheeler process. For a high-energy initial electron all the final ultrarelativistic particles propagate in a narrow cone along the direction of the initial electron momentum. The presence of threshold energy for the initial electron which is of order of 100 MeV for 1-KeV-frequency field is shown. At the same time, the energy spectrum of the final particles (two electrons and a positron) highly depends on their exit angles and on the initial electron energy. This result significantly distinguishes the resonant process from the non-resonant one. It is shown that the resonant differential probability significantly exceeds the non-resonant one.

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Lorentz Violation Footprints in the Spectrum of High-Energy Cosmic Neutrinos—Deformation of the Spectrum of Superluminal Neutrinos from Electron-Positron Pair Production in Vacuum

Symmetry ◽

10.3390/sym11111419 ◽

2019 ◽

Vol 11 (11) ◽

pp. 1419 ◽

Cited By ~ 2

Author(s):

José Manuel Carmona ◽

José Luis Cortés ◽

José Javier Relancio ◽

Maykoll Anthonny Reyes

Keyword(s):

Pair Production ◽

Numerical Simulations ◽

Lorentz Invariance ◽

Lorentz Violation ◽

High Energy ◽

Energy Scale ◽

Invariance Violation ◽

Electron Positron ◽

Lorentz Invariance Violation ◽

Electron Positron Pair

The observation of cosmic neutrinos up to 2 PeV is used to put bounds on the energy scale of Lorentz invariance violation through the loss of energy due to the production of e + e - pairs in the propagation of superluminal neutrinos. A model to study this effect, which allows us to understand qualitatively the results of numerical simulations, is presented.

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Energy dependence of bound-electron–positron pair production at very-high-energy ion-ion transits

Physical Review A ◽

10.1103/physreva.44.5569 ◽

1991 ◽

Vol 44 (9) ◽

pp. 5569-5585 ◽

Cited By ~ 63

Author(s):

A. J. Baltz ◽

M. J. Rhoades-Brown ◽

J. Weneser

Keyword(s):

Pair Production ◽

Energy Dependence ◽

High Energy ◽

Electron Positron ◽

Very High Energy ◽

Bound Electron ◽

Electron Positron Pair ◽

Very High

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COHERENT PAIR PRODUCTION IN CRYSTALS IN PRESENCE OF ACOUSTIC WAVES

International Journal of Modern Physics A ◽

10.1142/s0217751x10049906 ◽

2010 ◽

Vol 25 (supp01) ◽

pp. 47-54

Author(s):

A. R. MKRTCHYAN ◽

A. A. SAHARIAN ◽

V. V. PARAZIAN

Keyword(s):

Single Crystal ◽

Pair Production ◽

Cross Section ◽

Acoustic Waves ◽

High Energy ◽

Deformation Field ◽

Crystallographic Axis ◽

Electron Positron ◽

Coherent Pair ◽

Electron Positron Pair

Coherent electron-positron pair production by high-energy photons is investigated in a periodically deformed single crystal with a complex base. The formula for the corresponding differential cross-section is derived for an arbitrary deformation field. The conditions are specified under which the influence of the deformation is considerable. The case is considered in detail when the photon enters into the crystal at small angles with respect to a crystallographic axis. The results of the numerical calculations are presented for SiO 2 single crystal in the case of the deformation field generated by the acoustic wave of the S type. It is shown that, in dependence of the parameters, the presence of deformation can either enhance or reduce the pair creation cross-section.

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