Model Predictions of Neutron and Isotope Production from Proton Induced Fission at High Energies

1983 ◽  
pp. 391-394
Author(s):  
T. W. Armstrong ◽  
D. Filges ◽  
P. Cloth
Keyword(s):  
Isotope Production ◽  
High Energies ◽  
Model Predictions ◽  
Induced Fission

scholarly journals Taming the Energy Rise of the Total Proton-Proton Cross-Section

Universe ◽  
2019 ◽  
Vol 5 (5) ◽  
pp. 106 ◽  
Author(s):  
Sergey Ostapchenko ◽  
Marcus Bleicher
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Strong Increase ◽  
Momentum Fraction ◽  
Proton Proton ◽  
High Energies ◽  
Model Predictions ◽  
Potential Impact ◽  
Very High

Steep rise of parton densities in the limit of small parton momentum fraction x poses a challenge for describing the observed energy-dependence of the total and inelastic proton-proton cross sections σ p p tot / inel : considering a realistic parton spatial distribution, one obtains a too-strong increase of σ p p tot / inel in the limit of very high energies. We discuss various mechanisms which allow one to tame such a rise, paying special attention to the role of parton-parton correlations. In addition, we investigate a potential impact on model predictions for σ p p tot, related to dynamical higher twist corrections to parton-production processes.

scholarly journals Theory Status - Puzzles in B Meson Decays and LFU?

2019 ◽  
Author(s):  
Svjetlana Fajfer
Keyword(s):  
B Meson ◽  
New Physics ◽  
Charged Current ◽  
B Decays ◽  
Muon Anomalous Magnetic Moment ◽  
High Energies ◽  
Effective Lagrangian ◽  
The Standard Model ◽  
Model Predictions ◽  
Decay Widths

Currently B meson puzzles motivate many studies of New Physics due to the observed deviations from the Standard Model predictions. There are two B meson puzzles, R_{D^{(*)}}RD(*) and R_{K^{(*)}}RK(*). The first one denotes the deviations in the decays driven by the charged current in the ratio of the decay widths for B \to D^{(*)} \tau \nuB→D(*)τν and B \to D^{(*)} \mu \nuB→D(*)μν, while the second one is related to the ratio of the decay widths for B \to K^{(*)} \mu^+ \mu^-B→K(*)μ+μ− and B \to K^{(*)} e^+ e^-B→K(*)e+e− transition. Also, the measured muon anomalous magnetic moment differs from the SM predictions. Usually, the effective Lagrangian approach containing New Physics effects is used to analyse R_{D^{(*)}}RD(*) and R_{K^{(*)}}RK(*). Among many models of New Physics, various leptoquark models are suggested to resolve both B meson anomalies. If New Physics is confirmed in B decays a number of processes at low and high energies should confirm its presence.

Analysis of pion–nucleus interactions in the framework of a multistring model

2002 ◽  
Vol 80 (12) ◽  
pp. 1571-1578
Author(s):  
S Dhamija ◽  
M Kaur ◽  
S Dahiya
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Code ◽  
High Energies ◽  
Longitudinal Excitation ◽  
Model Predictions ◽  
String Fragmentation ◽  
String Formation

A multistring model implemented through Monte Carlo code, modified-FRITIOF is used to analyse the data from π– –Em interactions at high energies. The model is based on the concept of classical strings, and using the method of longitudinal excitation as a means of string formation, the subsequent string fragmentation follows the Lund fragmentation scheme. The analysis gives interesting comparison between the data and the model predictions. PACS No.: 25.70

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
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