scholarly journals Charged Higgs pair production in association with the Z0 boson at electron-positron colliders

2018 ◽  
Vol 98 (1) ◽  
Author(s):  
Nasuf Sonmez
Keyword(s):  
Pair Production ◽  
Electron Positron ◽  
Charged Higgs

Electron-Positron Pair Production in an Elliptic Polarized Time Varying Field

2012 ◽  
Vol 29 (2) ◽  
pp. 021102 ◽  
Author(s):  
Bai-Song Xie ◽  
Mohamedsedik Melike ◽  
Dulat Sayipjamal
Keyword(s):  
Pair Production ◽  
Time Varying ◽  
Electron Positron ◽  
Electron Positron Pair

X-ray free electron laser for electron–positron pair production on the nuclei

2003 ◽  
pp. 582-586
Author(s):  
H.K. Avetissian ◽  
A.K. Avetissian ◽  
G.F. Mkrtchian ◽  
Kh.V. Sedrakian
Keyword(s):  
Pair Production ◽  
Free Electron ◽  
Free Electron Laser ◽  
X Ray ◽  
Electron Positron ◽  
Electron Positron Pair

scholarly journals Pair Production in AGN

1989 ◽  
Vol 134 ◽  
pp. 194-196
Author(s):  
C. Done ◽  
A. C. Fabian
Keyword(s):  
Pair Production ◽  
Compton Scattering ◽  
Energy Flux ◽  
Large Fraction ◽  
Small Region ◽  
X Rays ◽  
X Ray ◽  
Electron Positron ◽  
Γ Rays ◽  
Radiant Power

The X-ray luminosity and variability of many AGN are sufficiently extreme that any hard γ-rays produced in the source will collide with the X-rays and create electron-positron pairs, rather than escape. A small region where vast amounts of energy are produced, such as an AGN, is an ideal place to accelerate particles to relativistic energies and so produce γ-rays by Compton scattering. The observed X-ray spectra of AGN are hard and indicate that most of the luminosity is at the highest energies so that absorption of the γ-rays represents a large fraction of the energy flux, which can then be re-radiated at lower energies. Pairs can thus effectively reprocess much of the radiant power in an AGN.

scholarly journals Electron-positron pair production observed from laser-induced processes in ultra-dense deuterium D(-1)

2014 ◽  
Vol 32 (4) ◽  
pp. 537-548 ◽  
Author(s):  
Frans Olofson ◽  
Leif Holmlid
Keyword(s):  
Pair Production ◽  
Time Of Flight ◽  
Forward Direction ◽  
Metal Plate ◽  
Negative Bias ◽  
Lepton Pairs ◽  
Rapid Variation ◽  
Electron Positron ◽  
Electrons And Positrons ◽  
Time Variations

AbstractLaser-induced fusion in ultra-dense deuterium D(-1) is reported in several studies from our group, using ns- and ps-pulsed lasers. The ejection of ultra-dense hydrogen particles with thermal distributions and energy up to 20 MeV u−1 was studied previously by time-of-flight measurements. The investigations of the new processes continue now by studying the interaction of these particles with metal surfaces. In the present experiments, such particles penetrate in two steps through 1 mm of metal and reach three levels of collectors at distances up to 1 m. Only the fastest particles penetrate and move to the next level. The thermal time-of-flight distributions together with tests with strong magnetic fields exclude electrons as the particles observed. The sign of the signals to the metal collectors depends on the bias (negative bias gives positive signal and conversely) while the time variations of the signals for positive and negative bias are similar. The rapid variation of the signals indicates electrons and positrons ejected from the collectors, thus lepton-pair production. An increase in bias up to ± 400 V increases the peak signal up to 1 A with no observed limiting. A thick metal plate removes slow particles and most gamma photons. The number of lepton-pairs produced is > 4 × 1012 sr−1 in the forward direction per laser shot.

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