AUTOMATIC CALCULATIONS IN HIGH ENERGY PHYSICS BY GRACE AND COMPHEP

1994 ◽  
Vol 05 (04) ◽  
pp. 615-628 ◽  
Author(s):  
E.E. BOOS ◽  
M.N. DUBININ ◽  
V.A. ILYIN ◽  
A.E. PUKHOV ◽  
S.A. SHICHANIN ◽  
...  
Keyword(s):  
Numerical Integration ◽  
Cross Sections ◽  
High Energy Physics ◽  
Theoretical Study ◽  
Heavy Particle ◽  
Statistical Error ◽  
High Energy ◽  
Computer Codes ◽  
Three Body ◽  
Energy Physics

Ten three-body processes in e+e− collisions for heavy particle productions such as Higgs, t-quark, W± and Z0 are calculated by two independent computer codes for automatic calculation of Feynman amplitude. The results are in excellent agreement within statistical error of numerical integration (about 0.5%). This demonstrates that these systems are quite powerful for theoretical study for future e+e−, e±γ and γγ colliders. Numerical values of cross sections are summarized in tables and a figure.

scholarly journals CALCULATING TWO- AND THREE-BODY DECAYS WITH FeynArts AND FormCalc

2003 ◽  
Vol 14 (09) ◽  
pp. 1273-1278 ◽  
Author(s):  
MICHAEL KLASEN
Keyword(s):  
Standard Model ◽  
Particle Production ◽  
High Energy Physics ◽  
High Energy ◽  
Energy Distributions ◽  
Particle Decay ◽  
The Standard Model ◽  
Decay Widths ◽  
Three Body ◽  
Energy Physics

The Feynman diagram generator FeynArts and the computer algebra program FormCalc allow for an automatic computation of 2→2 and 2→3 scattering processes in High Energy Physics. We have extended this package by four new kinematical routines and adapted one existing routine in order to accomodate also two- and three-body decays of massive particles. This makes it possible to compute automatically two- and three-body particle decay widths and decay energy distributions as well as resonant particle production within the Standard Model and the Minimal Supersymmetric Standard Model at the tree- and loop-level. The use of the program is illustrated with three standard examples: [Formula: see text], [Formula: see text], and [Formula: see text].

Experiments on proton-proton interactions at the Institute of High-Energy Physics, Serpukhov, U. S. S. R

1973 ◽  
Vol 335 (1603) ◽  
pp. 421-430
Keyword(s):  
Elastic Scattering ◽  
Cross Sections ◽  
High Energy Physics ◽  
Bubble Chamber ◽  
High Energy ◽  
Hydrogen Bubble ◽  
Hydrogen Bubble Chamber ◽  
Proton Proton ◽  
Total Cross Sections ◽  
Energy Physics

A summary of the work carried out at the Institute for High-Energy Physics, Serpukhov, U. S. S. R., on proton-proton interactions at energies between 10 and 70 GeV is given. The experiments comprise studies of small angle elastic scattering, of total cross-sections and of interactions in a hydrogen bubble chamber.

scholarly journals NEW PHYSICS DISCOVERY POTENTIAL IN FUTURE EXPERIMENTS

1998 ◽  
Vol 13 (40) ◽  
pp. 3235-3249 ◽  
Author(s):  
S. I. BITYUKOV ◽  
N. V. KRASNIKOV
Keyword(s):  
Cross Sections ◽  
High Energy Physics ◽  
High Energy ◽  
New Physics ◽  
Physics Simulation ◽  
Discovery Potential ◽  
Proper Definition ◽  
Definition Of ◽  
Physics Experiments ◽  
Energy Physics

We propose a method to estimate the probability of new physics discovery in future high energy physics experiments. Physics simulation gives both the average numbers <Nb> of background and <Ns> of signal events. We find that the proper definition of the significance for <Nb>, <Ns> ≫ 1 is [Formula: see text] in comparison with often used significances: [Formula: see text] and [Formula: see text]. We propose a method of taking into account the systematical errors related to nonexact knowledge of background and signal cross-sections. An account of such systematics is essential in the search for supersymmetry at LHC. We also propose a method for estimating exclusion limits on new physics in future experiments.

scholarly journals Phenomenological and theoretical developments in jet physics at the LHC

2015 ◽  
Vol 30 (31) ◽  
pp. 1546001 ◽  
Author(s):  
Matteo Cacciari
Keyword(s):  
Cross Sections ◽  
High Energy Physics ◽  
High Energy ◽  
Jet Physics ◽  
The Status ◽  
History Of ◽  
Jet Cross Sections ◽  
New Algorithms ◽  
Energy Physics ◽  
Theoretical Developments

We review the history of jets in high energy physics, and describe in more detail the developments of the past ten years, discussing new algorithms for jet finding and their main characteristics, and summarising the status of perturbative calculations for jet cross sections in hadroproduction. We also describe the emergence of jet grooming and tagging techniques and their application to boosted jets analyses.

scholarly journals Deuteron breakup at zero angle in the Coulomb nuclear field

2019 ◽  
Vol 204 ◽  
pp. 10011
Author(s):  
Igor Sitnik
Keyword(s):  
Cross Section ◽  
High Precision ◽  
Cross Sections ◽  
High Energy Physics ◽  
Nuclear Research ◽  
High Energy ◽  
Deuteron Breakup ◽  
The Cross ◽  
Cross Section Maximum ◽  
Energy Physics

Deuteron breakup cross sections on the C and CH2 targets have been measured up to the proton internal momenta of 0.3 GeV/c. The cross-sections 12C(d, p)X and 1H(d, p)X reactions have been obtained with high precision. The obtained data are compared with previous measurements. The behavior features in the vicinity of the cross section maximum were studied in dependence on the transversal momentum in the region of 0.01 < pt < 0.16 GeV/c. The measurements have been performed at the Veksler Baldin Laboratory of High Energy Physics of the Joint Institute for Nuclear Research.

scholarly journals Analysis of pp and p̄p elastic scatterings based on theoretical bounds in high-energy physics: An update

2017 ◽  
Vol 32 (28n29) ◽  
pp. 1750175 ◽  
Author(s):  
V. A. Okorokov ◽  
S. D. Campos
Keyword(s):  
Cross Sections ◽  
High Energy Physics ◽  
Quantitative Description ◽  
Cosmic Ray ◽  
High Energy ◽  
Hadron Colliders ◽  
Total Cross Sections ◽  
Energy Frontier ◽  
Energy Physics ◽  
Axiomatic Quantum Field Theory

In a previous work a novel parametrization was proposed for the [Formula: see text] and [Formula: see text] total cross-sections. Here, results are presented for the updated analysis with taking into account the recent data from accelerator experiments as well as from cosmic ray measurements. The analytic parametrizations suggested within axiomatic quantum field theory (AQFT) provide the quantitative description of energy dependence of global scattering observables with robust values of fit parameters. Based on the fit results the estimations are derived for the total cross-section and the [Formula: see text] parameter in elastic [Formula: see text] scattering at various [Formula: see text] up to energy frontier [Formula: see text] PeV which can be useful for present and future hadron colliders as well as for cosmic ray measurements at ultra-high energies.

scholarly journals HepSim: A Repository with Predictions for High-Energy Physics Experiments

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
S. V. Chekanov
Keyword(s):  
Monte Carlo ◽  
Cross Sections ◽  
High Energy Physics ◽  
Theoretical Calculations ◽  
High Energy ◽  
Monte Carlo Event ◽  
Data Streaming ◽  
High Energy Collisions ◽  
Physics Experiments ◽  
Energy Physics

A file repository for calculations of cross sections and kinematic distributions using Monte Carlo generators for high-energy collisions is discussed. The repository is used to facilitate effective preservation and archiving of data from theoretical calculations and for comparisons with experimental data. The HepSim data library is publicly accessible and includes a number of Monte Carlo event samples with Standard Model predictions for current and future experiments. The HepSim project includes a software package to automate the process of downloading and viewing online Monte Carlo event samples. Data streaming over a network for end-user analysis is discussed.

scholarly journals Inelastic cross sections of relativistic protons on Lead

2019 ◽  
Vol 18 ◽  
pp. 49
Author(s):  
M. Zamani ◽  
S. Stoulos ◽  
M. Fragopoulou ◽  
M. Manolopoulou ◽  
N. A. Sosnin ◽  
...  
Keyword(s):  
Cross Section ◽  
Neutron Source ◽  
Cross Sections ◽  
High Energy Physics ◽  
Analytical Calculation ◽  
High Energy ◽  
Inelastic Cross Section ◽  
Spallation Neutron Source ◽  
Fitting Procedure ◽  
Energy Physics

The inelastic cross section of relativistic protons in Lead was determined indirectly by measuring the neutron distribution along a Lead spallation neutron source. The spallation neutron source was irradiated by 1, 1.5 and 2 GeV protons. The experimental results were taken using passive methods. A fitting procedure has been applied to the experimental data and the results have been compared with analytical calculation of the produced hadrons’ spatial distribution based on High Energy Physics concepts. Using the beam attenuation coefficient the inelastic cross section of protons in Pb was estimated.

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