The Carpet-3 EAS Array for Investigation of Gamma-Radiation with Energy $$\boldsymbol{E>100}$$ TeV

Physics of Atomic Nuclei - The Carpet-3 experiment for investigation of gamma radiation with energy above 100 TeV is currently being prepared at the Baksan Neutrino Observatory of the Institute for...     

Magnetodielectric composites based on functionalized polyphenylene sulfides containing iron nanoparticles

Preparation of iron-filled polyaminophenylene sulfides and polyhydroxyaminophenylene sulfides by the metal vapor procedure was studied. Nanocomposites based on these metal-containing polymers and epoxy-isopropylidenediphenol oligomers (ED-20) were prepared and their composition, properties, and structure were studied by X-ray diffraction and thermogravimetric analyses, and thermomechanical methods. The magnetic and dielectric properties of the materials were determined.     

Carpet-2 Search for PeV Gamma Rays Associated with IceCube High-Energy Neutrino Events

JETP Letters - Carpet-2 is an air-shower array at Baksan Valley, Russia, equipped with a large-area (175 m2) muon detector, which makes it possible to separate primary photons from hadrons. We...     

Study of Earth’s Heat Flux by Means of Geoneutrino Detection

Physics of Atomic Nuclei - The heat flux from the Earth’s interior and its connection with the number of neutrinos recorded by detectors at the Earth’s surface are discussed. The values...     

Space Anisotropy Search at Colliders

In the framework of model with Lorentz violation (LV) we discuss a physical observables for q\(\bar q\) pair production at lepton–lepton colliders and describe the experimental signal to be detected. We obtain a conservative limits on Lorentz-violating dimensionless coupling for quark sector from LEP data. We also make a phenomenological prediction for LV model at the future lepton collider.     

Carpet—2 Search for Gamma Rays above 100 TeV in Coincidence with HAWC and IceCube Alerts

JETP Letters - We report on the search of astrophysical gamma rays with energies in the 100 TeV to several PeV range arriving in directional and temporal coincidence with public alerts from HAWC...     

Muon Content of Extensive Air Showers: Comparison of the Energy Spectra Obtained by the Sydney University Giant Air-Shower Recorder and by the Pierre Auger Observatory

The Sydney University Giant Air-shower Recorder(SUGAR) measured the energy spectrum of ultra-high-energy cosmic rays reconstructed from muon detector reading. Comparison of their spectra SUGAR and Pierre Auger Observatory allows us to reconstruct the empirical dependence of the number of muons in a vertical shower on the primary energy for energies between 1017 and 1018 eV. We compared this dependence with the predictions of hadronic interaction models QGSJET-II-04, EPOS-LHC and SIBYLL-2.3c. In addition, we analyzed the response of the array of muon detectors in order to determine the slope of the muon lateral distribution function. It is important to understand how much the number of muons differs from the predictions of modeling at different distances from the shower axis.