arXiv subjects

V. N. Goryachev

Publications and source records attributed to V. N. Goryachev.

5 recordsLinked to original sources

arXiv2019

Properties of a simple e/gamma detector consisting of a lead convertor and a hodoscope

The results of the calculations of coordinate resolution and hadron rejection factor for a simple e/gamma detector consisting of a lead convertor followed by a hodoscope are presented. For the simulation of showers, initiated in the converter by electrons and hadrons with energies upto 1 TeV GEANT4 is used. It is shown that the best coordinate resolution for electrons is achieved when the converter thickness is closed to the shower maximum. For example, at 200 GeV with 2 mm strip width hodoscope it is equal to sigma=89 microns provided a "truncated mean" coordinate estimation is used. The optimal thickness of the converter for hadron rejection is also close to tmax. For 200 GeV beam of electrons and protons the rejection factor of 10^-4 for 0.9 electron detection efficiency can be reached using only data on charged particles multiplicities. Information on the spatial distribution of the shower particles after the converter allows to enhance further the rejection by several times.

physics.ins-det↗

arXiv2019

Distributions of the charged particles multiplicities in the electromagnetic showers initiated by 10 to 1000 GeV electrons in lead

Distributions of the charged particles multiplicities in the electromagnetic showers initiated by 10 to 1000 GeV electrons in lead are calculated using GEANT4. It is shown that they are well fitted by the inverse sum of two exponents. The evolution of the multiplicity distribution shapes as a function of the lead depth is discussed. An estimate of the energy resolution of a simple e,γ detector consisting of a high Z convertor and a counter of the shower electrons and positrons is presented.

physics.ins-det↗

arXiv2018

Energy, radial and time distributions of the charged particles at the maximum of electromagnetic showers initiated by 5-1000 GeV electrons in Fe, W and Pb

The results of calculations of the charged particles energy, radial and time distributions at the maximum of electromagnetic showers initiated by electrons with energies from 5 to 1000 GeV in Fe, W and Pb are presented. It is shown that the shapes of energy distributions weekly depend on the electron energy, radial distributions for different materials become close to each other if radius is expressed in g/cm2 and the time spread of the shower particles is in the picosecond range. Analysis of the data obtained allows us to conclude that a high Z material placed in a high energy electron beam can be used as a source of short and intense bunches of ultarelativistic positrons and electrons with subpicosecond time spread.

physics.ins-det↗

arXiv2018

Multiplicity distributions of the charged particles at the maximum of electromagnetic showers initiated by 5-1000 GeV electrons in Fe, W and Pb

Charged particles multiplicity distributions at the maximum of electromagnetic showers initiated by 5 to 1000 GeV electrons in Fe, W, and Pb were calculated using GEANT4. It is shown that they are reasonably well fitted by the inverse sum of two exponents and the energy dependence of the average multiplicity follows power law with the power of ~0.95 for all studied materials.

physics.ins-det↗

arXiv2001

Determination of the high-twist contribution to the structure function $xF^{νN}_3$

We extract the high-twist contribution to the neutrino-nucleon structure function $xF_3^{(ν+\barν)N}$ from the analysis of the data collected by the IHEP-JINR Neutrino Detector in the runs with the focused neutrino beams at the IHEP 70 GeV proton synchrotron. The analysis is performed within the infrared renormalon (IRR) model of high twists in order to extract the normalization parameter of the model. From the NLO QCD fit to our data we obtained the value of the IRR model normalization parameter $Λ^2_{3}=0.69\pm0.37~({\rm exp})\pm0.16~({\rm theor})~{\rm GeV}^2$. We also obtained $Λ^2_{3}=0.36\pm0.22~({\rm exp})\pm0.12~({\rm theor})~{\rm GeV}^2$ from a similar fit to the CCFR data. The average of both results is $Λ^2_{3}=0.44\pm0.19~({\rm exp})~{\rm GeV}^2$.

hep-ex↗