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.

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.

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 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 Lorentz invariant relative velocity and relativistic binary collisions

2017 ◽  
Vol 32 (02n03) ◽  
pp. 1730002 ◽  
Author(s):  
Mirco Cannoni
Keyword(s):  
Cross Section ◽  
Relative Velocity ◽  
High Energy Physics ◽  
High Energy ◽  
Kinematic Variable ◽  
Binary Collisions ◽  
Classical Gas ◽  
Physics Literature ◽  
Relativistic Scattering ◽  
Energy Physics

This paper reviews the concept of Lorentz invariant relative velocity that is often misunderstood or unknown in high energy physics literature. The properties of the relative velocity allow to formulate the invariant flux and cross-section without recurring to nonphysical velocities or any assumption about the reference frame. Applications such as the luminosity of a collider, the use as kinematic variable, and the statistical theory of collisions in a relativistic classical gas are reviewed. It is emphasized how the hyperbolic properties of the velocity space explain the peculiarities of relativistic scattering.

scholarly journals Inelastic cross sections in relativistic deuterons on Lead reactions

2020 ◽  
Vol 19 ◽  
pp. 81
Author(s):  
M. Zamani ◽  
S. Stoulos ◽  
M. Fragopoulou ◽  
M. Krivopustov
Keyword(s):  
Experimental Data ◽  
Solid State ◽  
Attenuation Coefficient ◽  
Cross Section ◽  
Cross Sections ◽  
Inelastic Cross Section ◽  
Lead Target ◽  
Spallation Neutron Source ◽  
Interaction Length ◽  
Beam Attenuation

The inelastic cross section of deuterons hitting a Lead target has been determined by the beam attenuation technique. A spallation neutron source based on Lead target has been irradiated with 1.6 and 2.5 GeV deuterons. Solid state nuclear track detectors as well as the activation method were used in order to obtain the neutron and proton distribution along the surface of the source. The attenuation coefficient was estimated by fitting the experimental data taking into account the build up effect and the beam attenuation. Using the attenuation coefficient, the interaction length and then the inelastic cross section of deuterons on Lead reaction have been determined.

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 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 Validation of heavy water cross section using AmBe neutron source

2020 ◽  
Vol 239 ◽  
pp. 18008
Author(s):  
Michal Kostal ◽  
Martin Schulc ◽  
Evzen Novak ◽  
Tomas Czakoj ◽  
Zdenek Matej ◽  
...  
Keyword(s):  
Cross Section ◽  
Neutron Source ◽  
Cross Sections ◽  
Average Energy ◽  
Nuclear Data ◽  
High Energy ◽  
Suitable Candidate ◽  
Neutron Spectra ◽  
Misleading Interpretation ◽  
Neutron Leakage

Physical quantities derived from integral experiments can usually be measured much more accurately than that from differential nuclear data. The accurate knowledge of integral parameters provide excellent grounds for testing and tuning differential data such as, for instance, cross sections. Measurement of neutron leakage spectra with 252Cf neutron source located at sphere center is often used for integral experiments. While this type of experiments provide information for cross section tuning, however, care must be taken to avoid misleading interpretation, namely, at high energies due to the very low portion of high energy neutrons in 252Cf spectrum. This issue can be alleviated by the use of point source with different spectra shape. For that purpose one suitable candidate seems to be the AmBe neutron source which has a relatively high average energy and peak character of emitted neutrons. Indeed, AmBe seems an interesting option because the calculated leakage neutron spectra are not very sensitive to the input shape of the neutron spectra. Thus the neutron leakage spectra calculated using tabulated of International Organization for Standardization spectra is nearly the same as stilbene measured AmBe spectra as an input.

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