2,212 research outputs found
Application of deep learning methods to the study of magnetic phenomena
Nowadays, methods and techniques of Machine Learning and Deep Learning are
being used in various scientific areas. They help to automatize calculations
without losing in quality. In this paper the applying of convolutional neural
network was considered in frame of problems from statistical physics and
computer simulation of magnetic films. In a frame of the first task, CNN was
used to determine critical Curie point for Ising model on 2D square lattice.
Obtained results were compared with classical Monte-Carlo methods and exact
solution. Systems of various lattice sizes and the influence of the size effect
on the results' accuracy were considered. Also, authors considered the
classical two-dimensional Heisenberg model, a spin system with direct
short-range exchange, and studied of its competition with the
Dzyaloshinskii-Moriya interaction. A neural network was applied to the
recognition of Spiral (Sp), Spiral-skyrmion (SpSk) Skyrmion (Sk),
Skyrmion-ferromagnetic (SkF) and Ferromagnetic (FM) phases of the Heisenberg
spin system with magnetic skyrmions. The advantage of CNN's application over
conventional methods for determination of skyrmion's phases was revealed.Comment: 6 pages, 3 figure
Search for decay with VES detector
The isospin violating decay has been studied at
VES facility. This study is based at the statistics acquired in
interactions at 27, 36.6 and 41 GeV/c in diffractive reaction . The decay is observed. The ratio of
decay probabilities to is .Comment: 10 pages, 8 figures, presented at XII Conference on Hadron
Spectroscop
Properties of Neutral Charmed Mesons in Proton--Nucleus Interactions at 70 GeV
The results of treatment of data obtained in the SERP-E-184experiment
"Investigation of mechanisms of the production of charmed particles in
proton-nucleus interactions at 70 GeV and their decays" by irradiating the
active target of the SVD-2 facility consisting of carbon, silicon, and lead
plates, are presented. After separating a signal from the two-particle decay of
neutral charmed mesons and estimating the cross section for charm production at
a threshold energy {\sigma}(c\v{c})=7.1 \pm 2.4(stat.) \pm 1.4(syst.)
\mub/nucleon, some properties of D mesons are investigated. These include the
dependence of the cross section on the target mass number (its A dependence);
the behavior of the differential cross sections d{\sigma}/dpt2 and
d{\sigma}/dxF; and the dependence of the parameter {\alpha} on the kinematical
variables xF, pt2, and plab. The experimental results in question are compared
with predictions obtained on the basis of the FRITIOF7.02 code.Comment: 9 pages, 9 figures,3 table
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