scholarly journals Electron-positron annihilation into two photons in an intense plane-wave field

2020 ◽  
Vol 102 (11) ◽  
Author(s):  
S. Bragin ◽  
A. Di Piazza
Keyword(s):  
Plane Wave ◽  
Wave Field ◽  
Positron Annihilation ◽  
Electron Positron Annihilation ◽  
Electron Positron ◽  
Plane Wave Field

Ensemble estimation of polarization ellipse parameters

2007 ◽  
Vol 463 (2088) ◽  
pp. 3375-3394 ◽  
Author(s):  
A.T Walden ◽  
T Medkour
Keyword(s):  
Angular Distribution ◽  
Standard Deviation ◽  
Aspect Ratio ◽  
Plane Wave ◽  
Wave Field ◽  
Covariance Matrix ◽  
Time Instant ◽  
Azimuth Angle ◽  
Ensemble Estimation ◽  
Plane Wave Field

An ellipse describes the polarized part of a partially polarized quasi-monochromatic plane wave field. Its azimuth angle and aspect ratio are functions of the elements of the covariance matrix associated with the polarized part at a particular time instant. Given an ensemble of K independent samples at that time, the distributions of the estimators of these parameters are derived. The estimation is thus based on a sample ensemble at any time, and does not assume temporal stationarity. Additionally, the azimuth angle estimator has an angular distribution so that non-standard statistical methods are needed when deriving its mean and standard deviation.

scholarly journals Calculation of the Doppler broadening of the electron-positron annihilation radiation in defect-free bulk materials

2000 ◽  
Vol 61 (15) ◽  
pp. 10092-10099 ◽  
Author(s):  
V. J. Ghosh ◽  
M. Alatalo ◽  
P. Asoka-Kumar ◽  
B. Nielsen ◽  
K. G. Lynn ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Annihilation Radiation ◽  
Doppler Broadening ◽  
Bulk Materials ◽  
Electron Positron Annihilation ◽  
Electron Positron

Experimental Verification of a Plane-Wave Field Synthesis Technique for MIMO OTA Antenna Testing

2016 ◽  
Vol 64 (7) ◽  
pp. 3141-3150 ◽  
Author(s):  
Afroza Khatun ◽  
Veli-Matti Kolmonen ◽  
Veikko Hovinen ◽  
Dristy Parveg ◽  
Markus Berg ◽  
...  
Keyword(s):  
Plane Wave ◽  
Wave Field ◽  
Experimental Verification ◽  
Synthesis Technique ◽  
Plane Wave Field ◽  
Wave Field Synthesis

Experimental study of jets in electron-positron annihilation

1981 ◽  
Vol 101 (1-2) ◽  
pp. 129-134 ◽  
Author(s):  
W. Bartel ◽  
D. Cords ◽  
P. Dittmann ◽  
R. Eichler ◽  
R. Felst ◽  
...  
Keyword(s):  
Experimental Study ◽  
Positron Annihilation ◽  
Electron Positron Annihilation ◽  
Electron Positron
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