scholarly journals Elastic diffractive scattering of nucleons at ultra-high energies

2014 ◽  
Vol 735 ◽  
pp. 57-61 ◽  
Author(s):  
A.A. Godizov
Keyword(s):  
High Energies ◽  
Diffractive Scattering

Systematics of hadron-proton diffractive scattering at high energies

1990 ◽  
Vol 47 (3) ◽  
pp. 377-396 ◽  
Author(s):  
C. Furget ◽  
M. Buenerd ◽  
P. Valin
Keyword(s):  
High Energies ◽  
Diffractive Scattering

QUANTUM CHROMODYNAMICS AT HIGH ENERGIES AT HERA

2005 ◽  
Vol 20 (22) ◽  
pp. 5202-5213
Author(s):  
MAX KLEIN
Keyword(s):  
Quantum Chromodynamics ◽  
Strong Interactions ◽  
Inelastic Electron ◽  
Proton Scattering ◽  
Coupling Constant ◽  
Fixed Target ◽  
High Energies ◽  
Diffractive Scattering ◽  
New Ideas ◽  
Energy Frontier

HERA is the world's only accelerator to study inelastic electron-proton scattering at the energy frontier which uniquely allows the partonic structure of the proton and the theory of strong interactions, QCD, to be deeply explored. A review is given here of recent results from the HERA ep collider experiments H1 and ZEUS and the fixed target eN spin experiment HERMES as was presented to the 32nd Rochester conference at Beijing in summer 2004. The summary comprises new results on the quark and gluon structure of the proton, on the strong coupling constant αs, on the production of charm and beauty particles and on hard diffractive scattering. New ideas and developments in HERA physics are presented as are the first measurements with the upgraded polarised ep collider.

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.

Valence electron spectroscopy of inhomogeneous media

1992 ◽  
Vol 50 (2) ◽  
pp. 1150-1151
Author(s):  
A. Howie ◽  
D.W. McComb
Keyword(s):  
Specific Gravity ◽  
Loss Function ◽  
Electron Spectroscopy ◽  
Valence Electron ◽  
Peak Height ◽  
Loss Functions ◽  
Loss Peak ◽  
High Energies ◽  
Valence Electron Density ◽  
Electron Microscopist

The bulk loss function Im(-l/ε (ω)), a well established tool for the interpretation of valence loss spectra, is being progressively adapted to the wide variety of inhomogeneous samples of interest to the electron microscopist. Proportionality between n, the local valence electron density, and ε-1 (Sellmeyer's equation) has sometimes been assumed but may not be valid even in homogeneous samples. Figs. 1 and 2 show the experimentally measured bulk loss functions for three pure silicates of different specific gravity ρ - quartz (ρ = 2.66), coesite (ρ = 2.93) and a zeolite (ρ = 1.79). Clearly, despite the substantial differences in density, the shift of the prominent loss peak is very small and far less than that predicted by scaling e for quartz with Sellmeyer's equation or even the somewhat smaller shift given by the Clausius-Mossotti (CM) relation which assumes proportionality between n (or ρ in this case) and (ε - 1)/(ε + 2). Both theories overestimate the rise in the peak height for coesite and underestimate the increase at high energies.

Photon interactions at high energies

2001 ◽  
Vol 16 (1-2) ◽  
pp. 49-85
Author(s):  
A. De Roeck
Keyword(s):  
High Energies ◽  
Photon Interactions

The importance of inelastic processes at high energies and the theory of fireballs

1970 ◽  
Vol 101 (7) ◽  
pp. 385-428 ◽  
Author(s):  
Igor M. Dremin ◽  
Il'ya I. Roizen ◽  
Dmitrii S. Chernavskii
Keyword(s):  
High Energies ◽  
Inelastic Processes

Fourth workshop on inelastic interactions at high energies

1976 ◽  
Vol 119 (7) ◽  
pp. 578
Author(s):  
Igor M. Dremin ◽  
G.B. Zhdanov ◽  
V.Ya. Fainberg
Keyword(s):  
High Energies ◽  
Inelastic Interactions

Fluctuations

2018 ◽  
Author(s):  
Richard Wigmans
Keyword(s):  
Energy Dependence ◽  
Energy Resolution ◽  
Practical Importance ◽  
Shower Particle ◽  
Formation Processes ◽  
Instrumental Effects ◽  
Important Type ◽  
High Energies ◽  
Different Types ◽  
Electromagnetic Component

The energy resolution, i.e. the precision with which the energy of a showering particle can be measured, is one of the most important characteristics of a calorimeter. This resolution is determined by fluctuations in the absorption and signal formation processes. In this chapter, the different types of fluctuations that may play a role are examined, and their relative practical importance is addressed. Sources of fluctuations include fluctuations in the number of signal quanta, sampling fluctuations, fluctuations in shower leakage, as well as a variety of instrumental effects. Since the energy dependence of the different types of fluctuations is not the same, different types of fluctuations may dominate the energy resolution at low and and at high energies. An important type of fluctuations is part of the non-compensation phenomena. It concerns fluctuations in the strength of the electromagnetic component of hadronic showers. The effects of these fluctuations, which typically dominate the energy resolution for hadron and jet detection, are examined in detail. In sampling calorimeters, one particular shower particle may sometimes have catastrophic effects on the calorimeter performance. Several examples of such cases are discussed.

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