Total cross sections, real part of the amplitude, and slope of diffraction cones of the pp and �pp forward scattering

1990 ◽  
Vol 33 (5) ◽  
pp. 436-440
Author(s):  
G. G. Arushanov ◽  
E. I. Iv ◽  
I. M. Kirson ◽  
M. S. Yakubov
Keyword(s):  
Cross Sections ◽  
Forward Scattering ◽  
Total Cross Sections

scholarly journals Implications of the ρ(s) measurements by TOTEM at the LHC

2018 ◽  
Vol 33 (35) ◽  
pp. 1850206 ◽  
Author(s):  
S. M. Troshin ◽  
N. E. Tyurin
Keyword(s):  
Energy Dependence ◽  
Cross Sections ◽  
Forward Scattering ◽  
Elastic Amplitude ◽  
Total Cross Sections ◽  
The Real

Implications of the recent measurements of the parameter [Formula: see text] (ratio of the real to imaginary parts of the forward scattering elastic amplitude) by TOTEM collaboration at [Formula: see text] = 13 TeV are discussed with emphasis on the rising energy dependence of the ratio of elastic to total cross-sections.

Analysis of STEM micrographs of thick objects

1978 ◽  
Vol 36 (2) ◽  
pp. 106-107
Author(s):  
S. Golladay
Keyword(s):  
Inelastic Scattering ◽  
Multiple Scattering ◽  
Mass Distribution ◽  
Cross Sections ◽  
Phase Contrast ◽  
Image Point ◽  
Contrast Effects ◽  
Total Cross Sections ◽  
Elastic And Inelastic Scattering

The theory of multiple scattering has been worked out by Groves and comparisons have been made between predicted and observed signals for thick specimens observed in a STEM under conditions where phase contrast effects are unimportant. Independent measurements of the collection efficiencies of the two STEM detectors, calculations of the ratio σe/σi = R, where σe, σi are the total cross sections for elastic and inelastic scattering respectively, and a model of the unknown mass distribution are needed for these comparisons. In this paper an extension of this work will be described which allows the determination of the required efficiencies, R, and the unknown mass distribution from the data without additional measurements or models. Essential to the analysis is the fact that in a STEM two or more signal measurements can be made simultaneously at each image point.

scholarly journals Total cross sections of eγ → $$ eX\overline{X} $$ processes with X = μ, γ, e via multiloop methods

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Roman N. Lee ◽  
Alexey A. Lyubyakin ◽  
Vyacheslav A. Stotsky
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Elliptic Integral ◽  
High Energy ◽  
Calculation Methods ◽  
Complete Elliptic Integral ◽  
Total Cross Sections ◽  
Multiloop Calculation ◽  
The Cross ◽  
Analytical Expressions

Abstract Using modern multiloop calculation methods, we derive the analytical expressions for the total cross sections of the processes e−γ →$$ {e}^{-}X\overline{X} $$ e − X X ¯ with X = μ, γ or e at arbitrary energies. For the first two processes our results are expressed via classical polylogarithms. The cross section of e−γ → e−e−e+ is represented as a one-fold integral of complete elliptic integral K and logarithms. Using our results, we calculate the threshold and high-energy asymptotics and compare them with available results.

Positronium- and positron–H2O total cross sections

2006 ◽  
Vol 39 (6) ◽  
pp. 1337-1344 ◽  
Author(s):  
J Beale ◽  
S Armitage ◽  
G Laricchia
Keyword(s):  
Cross Sections ◽  
Total Cross Sections
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