scholarly journals INFLUENCE OF THE RESULTS OF UHECR DETECTION ON THE LHC EXPERIMENTS

2013 ◽  
Vol 53 (A) ◽  
pp. 707-711 ◽  
Author(s):  
Anatoly A. Petrukhin
Keyword(s):  
Experimental Data ◽  
Cosmic Rays ◽  
Energy Region ◽  
Center Of Mass ◽  
Cosmic Ray ◽  
Theoretical Models ◽  
Energy Interval ◽  
Mass System ◽  
New Approaches ◽  
Region 10

The cosmic ray energy region 10<sup>15</sup> ÷ 10<sup>17</sup>TeV corresponds to LHC energies 1 ÷ 14TeV in the center-of-mass system. The results obtained in cosmic rays (CR) in this energy interval can therefore be used for developing new approaches to the analysis of experimental data, for interpreting the results, and for planning new experiments. The main problem in cosmic ray investigations is the remarkable excess of muons, which increases with energy and cannot be explained by means of contemporary theoretical models. Some possible new explanations of this effect and other unusual phenomena observed in CR, and ways of searching for them in the LHC experiments are discussed.

scholarly journals High energy cosmic ray interactions and UHECR composition problem

2019 ◽  
Vol 210 ◽  
pp. 02001
Author(s):  
Sergey Ostapchenko
Keyword(s):  
Experimental Data ◽  
Monte Carlo ◽  
Cosmic Rays ◽  
Cosmic Ray ◽  
High Energy ◽  
Ultra High Energy ◽  
Hadronic Interactions ◽  
High Energy Cosmic Rays ◽  
Cosmic Ray Interactions ◽  
Composition Problem

The differences between contemporary Monte Carlo generators of high energy hadronic interactions are discussed and their impact on the interpretation of experimental data on ultra-high energy cosmic rays (UHECRs) is studied. Key directions for further model improvements are outlined. The prospect for a coherent interpretation of the data in terms of the UHECR composition is investigated.

scholarly journals Cosmic ray spectra in planetary atmospheres

2008 ◽  
Vol 4 (S257) ◽  
pp. 471-473
Author(s):  
M. Buchvarova ◽  
P. Velinov
Keyword(s):  
Experimental Data ◽  
Solar Cycle ◽  
Cosmic Rays ◽  
Cosmic Ray ◽  
Planetary Atmospheres ◽  
Galactic Cosmic Rays ◽  
Outer Planets ◽  
Practical Possibility ◽  
The Earth ◽  
Theoretical Results

AbstractOur model generalizes the differential D(E) and integral D(>E) spectra of cosmic rays (CR) during the 11-year solar cycle. The empirical model takes into account galactic (GCR) and anomalous cosmic rays (ACR) heliospheric modulation by four coefficients. The calculated integral spectra in the outer planets are on the basis of mean gradients: for GCR – 3%/AU and 7%/AU for anomalous protons. The obtained integral proton spectra are compared with experimental data, the CRÈME96 model for the Earth and theoretical results of 2D stochastic model. The proposed analytical model gives practical possibility for investigation of experimental data from measurements of galactic cosmic rays and their anomalous component.

scholarly journals Atmospheric effects of the cosmic-ray mu-meson component

2018 ◽  
Vol 4 (3) ◽  
pp. 76-82 ◽  
Author(s):  
Валерий Янчуковский ◽  
Valery Yanchukovsky ◽  
Василий Кузьменко ◽  
Vasiliy Kuzmenko
Keyword(s):  
Experimental Data ◽  
Factor Analysis ◽  
Cosmic Rays ◽  
Theoretical Calculations ◽  
Cosmic Ray ◽  
Atmospheric Effects ◽  
Atmospheric Component ◽  
Significant Temperature ◽  
Muon Intensity ◽  
Barometric Effect

Variations in the intensity of cosmic rays observed in the depth of the atmosphere include the atmospheric component of the variations. Cosmic-ray muon telescopes, along with the barometric effect, have a significant temperature effect due to the instability of detected particles. To take into account atmospheric effects in muon telescope data, meteorological coefficients of muon intensity are found. The meteorological coefficients of the intensity of muons recorded in the depth of the atmosphere are estimated from experimental data, using various methods of factor analysis. The results obtained from experimental data are compared with the results of theoretical calculations.

scholarly journals 39. The anisotropy of primary cosmic radiation and the electromagnetic state in interplanetary space

1958 ◽  
Vol 6 ◽  
pp. 377-385
Author(s):  
V. Sarabhai ◽  
N. W. Nerurkar ◽  
S. P. Duggal ◽  
T. S. G. Sastry
Keyword(s):  
Experimental Data ◽  
Cosmic Rays ◽  
Cosmic Radiation ◽  
Interplanetary Space ◽  
Daily Variation ◽  
Cosmic Ray ◽  
The Sun ◽  
Cosmic Ray Intensity ◽  
Daily Variations ◽  
Primary Cosmic Radiation

Study of the anisotropy of cosmic rays from the measurement of the daily variation of meson intensity has demonstrated that there are significant day-today changes in the anisotropy of the radiation. New experimental data pertaining to these changes and their solar and terrestrial relationships are discussed.An interpretation of these changes of anisotropy in terms of the modulation of cosmic rays by streams of matter emitted by the sun is given. In particular, an explanation for the existence of the recently discovered types of daily variations exhibiting day and night maxima respectively, can be found by an extension of some ideas of Alfvén, Nagashima, and Davies. An integrated attempt is made to interpret the known features of the variation of cosmic ray intensity in conformity with ideas developed above.

scholarly journals Very high energy cosmic gamma rays

1965 ◽  
Vol 23 ◽  
pp. 253-258
Author(s):  
M. Libber ◽  
S. N. Milford ◽  
M. S. Spergel
Keyword(s):  
Pion Production ◽  
Center Of Mass ◽  
Cosmic Ray ◽  
High Energy ◽  
Mass System ◽  
Proton Proton ◽  
Production Spectrum ◽  
Very High Energy ◽  
Γ Rays ◽  
Γ Ray

Collisions of high energy cosmic rays with intergalactic gas produce various secondaries, including neutral pions that decay into high energy γ rays. The Landau-Milekhin hydrodynamical model for proton-proton collisions is used to calculate the pion production spectrum corresponding to cosmic γ rays of energy above 10 Gev. A source function for these high energy γ rays in space is found by combining the pion production and decay spectra with the primary cosmic ray proton flux. The resulting γ ray spectrum follows a different power law than spectra based upon the usual assumption of a line spectrum for the pions in the center of mass system of the colliding protons. The high energy γ ray intensity in space is calculated for a simple model universe. By comparison with previous estimates for the proton photoproduction process, it is found that proton-proton and proton-photon collisions appear to contribute about the same order of magnitude to the intergalactic γ ray intensity above ∼1016 eV.

ENERGY SPECTRA AND MASS COMPOSITION OF COSMIC RAYS IN THE FRACTAL-LIKE GALACTIC MEDIUM

2005 ◽  
Vol 20 (29) ◽  
pp. 6834-6836 ◽  
Author(s):  
A. A. LAGUTIN ◽  
A. G. TYUMENTSEV ◽  
A. V. YUSHKOV
Keyword(s):  
Cosmic Rays ◽  
Cosmic Ray ◽  
Energy Spectra ◽  
Mass Composition ◽  
Primary Spectrum ◽  
Composition Variation ◽  
Region 10 ◽  
Basic Features ◽  
Galactic Sources ◽  
Knee Problem

We consider the problem of the cosmic ray spectrum formation assuming that cosmic rays are produced by galactic sources. The fractional diffusion equation proposed in our recent papers is used to describe the cosmic rays propagation in interstellar medium. We show that in the framework of this approach it is possible to explain the locally observed basic features of the cosmic rays in the energy region 1010 ÷ 1020 eV : difference between spectral exponents of protons and other nuclei, mass composition variation, "knee" problem, flattening of the primary spectrum for E ≥ 1018 ÷ 1019 eV .

scholarly journals Lights and (some) shadows in the comparison among experimental data of heavy ion collisionat Fermi energies and the dynamical model AMD

2019 ◽  
Vol 223 ◽  
pp. 01050
Author(s):  
Silvia Piantelli ◽  
Alessandro Olmi ◽  
Paolo R. Maurenzig ◽  
Akira Ono ◽  
Maurizio Bini ◽  
...  
Keyword(s):  
Experimental Data ◽  
Impact Parameter ◽  
Fermi Energy ◽  
Energy Region ◽  
Heavy Ion Collisions ◽  
Theoretical Models ◽  
Heavy Ion ◽  
Dynamical Model ◽  
Ion Collisions ◽  
The Impact

The simulation of heavy ion collisions in the Fermi energy region is a challenge for the theoretical models; in particular it is difficult to obtain a coherent description in all the impact parameter range and to reproduce all the experimental observables. In this contribution we will show the very good job done by the dynamical model AMD [1] followed by the statistical code GEMINI [2, 3] as an afterburner. The model is able to reproduce the main characteristics of peripheral and semiperipheral collisions, although some discrepancies still persist.

THE ANOMALOUS COSMIC RAY COMPONENT: A SHORT SURVEY

2005 ◽  
Vol 20 (29) ◽  
pp. 6658-6661
Author(s):  
M. I. PANASYUK
Keyword(s):  
Cosmic Rays ◽  
Energy Range ◽  
Ionization Potential ◽  
Cosmic Ray ◽  
Theoretical Models ◽  
Anomalous Cosmic Rays ◽  
Current State ◽  
Short Survey ◽  
Low Charge ◽  
First Ionization Potential

Cosmic rays in the energy range around ~ 10 MeV/nucl correspond to the so-called "anomalous cosmic rays" (ACR). These particles have low charge states and a high first ionization potential. Below we give a short survey of the current state of experimental results and theoretical models of the ACR component.

The nature of the asymmetrical showers at an energy of 200 GeV and the features of the pion interaction

1968 ◽  
Vol 46 (10) ◽  
pp. S681-S683 ◽  
Author(s):  
I. N. Erofeeva ◽  
L. G. Mishchenko ◽  
V. S. Murzin ◽  
L. I. Sarycheva
Keyword(s):  
Pion Mass ◽  
Center Of Mass ◽  
Cosmic Ray ◽  
Primary Energy ◽  
Mass System ◽  
Target Mass ◽  
Considerable Portion ◽  
Pion Interaction ◽  
200 Gev ◽  
Ionization Calorimeter

The nuclear interactions of nucleons and pions at an energy of 200 GeV have been studied using an ionization calorimeter, cloud chamber, and hodoscope units. It has been found that the showers which are asymmetrical backward have the two-peak angular distribution (on a log tan θ plot) and, in the center-of-mass system, the charged particles and neutrals appear in the remote and front hemispheres respectively. The showers which are asymmetrical forward are produced mainly by primary pions and are symmetrical in the system where the target mass is close to the pion mass. It is suggested that in the cosmic-ray energy range (e.g. at energies ~10 GeV), after interaction, a pion retains a considerable part of the primary energy, but may change its charge and be transmuted into a π0 meson. Such an assumption makes it possible to explain the considerable portion of the energy transferred to a photon in the pion interactions.

Mean charged hadron multiplicities in high energy collisions — a new approach

1979 ◽  
Vol 57 (8) ◽  
pp. 1131-1135
Author(s):  
D. C. Ghosh ◽  
S. C. Naha ◽  
T. Roy
Keyword(s):  
Experimental Data ◽  
Energy Region ◽  
High Energy ◽  
Charged Hadron ◽  
New Approach ◽  
Entire Energy ◽  
High Energy Collisions ◽  
Region 10 ◽  
Semi Empirical ◽  
Remarkable Agreement

A semi-empirical formulation for the energy dependence of multiplicity in p–p collision has been proposed. It has been found that experimental data for the multiplicity show a remarkable agreement with this formulation in the entire energy region 10 GeV to 106 GeV.

Sign in / Sign up

Export Citation Format

Share Document