scholarly journals QCD instantons in high energy diffractive scattering: Instanton model of Pomeron

2005 ◽  
Vol 146 ◽  
pp. 140-142 ◽  
Author(s):  
A.E. Dorokhov ◽  
I.O. Cherednikov
Keyword(s):  
High Energy ◽  
Diffractive Scattering

scholarly journals GLUON PROPAGATOR IN DIFFRACTIVE SCATTERING

2006 ◽  
Vol 21 (28n29) ◽  
pp. 5861-5874 ◽  
Author(s):  
M. B. GAY DUCATI ◽  
W. K. SAUTER
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Momentum Transfer ◽  
Gluon Propagator ◽  
High Energy ◽  
Light Meson ◽  
Diffractive Scattering ◽  
Energy Processes ◽  
Photo Production

In this work, we perform a comparison of the use of distinct gluon propagators with the experimental data in diffractive processes, pp elastic scattering and light meson photo-production. The gluon propagators are calculated through nonperturbative methods, being justified their use in this class of events, due to the smallness of the momentum transfer. Our results are not able to select the best choice for the modified gluon propagator among the analyzed ones. This shows that the application of this procedure in this class of high energy processes, although giving a reasonable fit to the experimental data, should be taken with same caution.

scholarly journals Unitarisation dependence of diffractive scattering in light of high-energy collider data

2021 ◽  
Vol 2021 (9) ◽  
Author(s):  
Arno Vanthieghem ◽  
Atri Bhattacharya ◽  
Rami Oueslati ◽  
Jean-René Cudell
Keyword(s):  
Imaginary Part ◽  
Cross Sections ◽  
Cosmic Ray ◽  
High Energy ◽  
Additional Parameter ◽  
Elastic Amplitude ◽  
The Real ◽  
Diffractive Scattering ◽  
Diffractive Data ◽  
High Energy Collider

Abstract We study the consequences of high-energy collider data on the best fits to total, elastic, inelastic, and single-diffractive cross sections for pp and $$ p\overline{p} $$ p p ¯ scattering using different unitarisation schemes. We find that the data are well fitted both by eikonal and U-matrix schemes, but that diffractive data prefer the U-matrix. Both schemes may be generalised by means of an additional parameter; however, this yields only marginal improvements to the fits. We provide estimates for ρ, the ratio of the real part to the imaginary part of the elastic amplitude, for the different fits. We comment on the effect of the different schemes on present and future cosmic ray data.

THE CURRENT STATUS OF HIGH ENERGY ELASTIC SCATTERING

1992 ◽  
Vol 07 (19) ◽  
pp. 4449-4476 ◽  
Author(s):  
MARTIN M. BLOCK ◽  
KYUNGSIK KANG ◽  
ALAN R. WHITE
Keyword(s):  
Elastic Scattering ◽  
Total Cross Section ◽  
Cross Section ◽  
High Energy ◽  
Current Status ◽  
Tevatron Collider ◽  
Diffractive Scattering

The recent total cross section, σtot, and ρ-value results from the Fermilab Tevatron Collider experiments,1,2 presented at the 4th “Blois” Workshop on Elastic and Diffractive Scattering, held at Elba in May 1991, provide a natural springboard from which to launch a focused review of the field.

NEW UNDERSTANDING OF THE DIFFRACTIVE SCATTERING OF HADRONS AT HIGH ENERGIES: THE BLACKENING AND INCREASING EFFECTIVE INTERACTION AREA OF THE PROTON

1992 ◽  
Vol 07 (28) ◽  
pp. 2559-2565 ◽  
Author(s):  
SAUL BARSHAY ◽  
PATRICK HEILIGER ◽  
DIETER REIN
Keyword(s):  
Cross Sections ◽  
Scattering Amplitude ◽  
Effective Interaction ◽  
High Energy ◽  
Total Cross Sections ◽  
Energy Process ◽  
High Energies ◽  
Diffractive Scattering ◽  
Richard Feynman ◽  
High Energy Process

A new structure for the high-energy diffractive scattering amplitude is derived in two complementary ways (one of them recently revealed as due to Richard Feynman). Total cross-sections increase, due to a blackening of the interaction and also due to an effect which leads to an increase in the effective interaction area at fixed opacity. These features are dynamically related to the dominant high-energy process of multiparticle production.

scholarly journals QCD instantons and high-energy diffractive scattering

2002 ◽  
Vol 543 (3-4) ◽  
pp. 197-207 ◽  
Author(s):  
F. Schrempp ◽  
A. Utermann
Keyword(s):  
High Energy ◽  
Diffractive Scattering

The E-ring: interactions with plasma and implications for its evolution

1984 ◽  
Vol 75 ◽  
pp. 599-602
Author(s):  
T.V. Johnson ◽  
G.E. Morfill ◽  
E. Grun
Keyword(s):  
Time Scale ◽  
Particle Density ◽  
High Energy ◽  
Particle Removal ◽  
Density Region ◽  
Drag Forces ◽  
Orbit Evolution ◽  
History Of ◽  
Ring Particle ◽  
Ring Material

A number of lines of evidence suggest that the particles making up the E-ring are small, on the order of a few microns or less in size (Terrile and Tokunaga, 1980, BAAS; Pang et al., 1982 Saturn meeting; Tucson, AZ). This suggests that a variety of electromagnetic and plasma affects may be important in considering the history of such particles. We have shown (Morfill et al., 1982, J. Geophys. Res., in press) that plasma drags forces from the corotating plasma will rapidly evolve E-ring particle orbits to increasing distance from Saturn until a point is reached where radiation drag forces acting to decrease orbital radius balance this outward acceleration. This occurs at approximately Rhea's orbit, although the exact value is subject to many uncertainties. The time scale for plasma drag to move particles from Enceladus' orbit to the outer E-ring is ~104yr. A variety of effects also act to remove particles, primarily sputtering by both high energy charged particles (Cheng et al., 1982, J. Geophys. Res., in press) and corotating plasma (Morfill et al., 1982). The time scale for sputtering away one micron particles is also short, 102 - 10 yrs. Thus the detailed particle density profile in the E-ring is set by a competition between orbit evolution and particle removal. The high density region near Enceladus' orbit may result from the sputtering yeild of corotating ions being less than unity at this radius (e.g. Eviatar et al., 1982, Saturn meeting). In any case, an active source of E-ring material is required if the feature is not very ephemeral - Enceladus itself, with its geologically recent surface, appears still to be the best candidate for the ultimate source of E-ring material.

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