121894404
A proposed NEVOD-EAS installation for the detection of extensive air showers
A new installation is dedicated to the independent evaluation of extensive air shower (EAS) energies detected in the NEVOD-DECOR experiment in the knee region of the energy spectrum. The design for the measuring system of the shower installation is based on clusters of scintillation detectors that are located on the roofs of laboratory buildings at MEPhI (Moscow) and will detect the electromagnetic (for near-vertical showers) and muon (for large zenith angles) EAS components. Features of the measuring system, the system for data acquisition and processing, and the results from investigating the characteristics of a single detector are discussed, along with the algorithm for event formation by the data of separate clusters.
126177483
The role of VHE muons in an explanation of unusual events observed in cosmic rays
Unusual events observed in cosmic-ray experiments that cannot be explained in the context of modern theories and models are considered. The peculiarities of VHE (>= 100 TeV) muon interactions and their possible contribution to the production of various unusual events in cosmic rays are analyzed. Some preliminary results obtained in relation to unusual events detected in the Tien Shan calorimeter and in the Pamir experiment are discussed.
119359927
Measurements of integral muon intensity at large zenith angles
High-statistics data on near-horizontal muons collected with Russian-Italian coordinate detector DECOR are analyzed. Precise measurements of muon angular distributions in zenith angle interval from 60 to 90 degrees have been performed. In total, more than 20 million muons are selected. Dependences of the absolute integral muon intensity on zenith angle for several threshold energies ranging from 1.7 GeV to 7.2 GeV are derived. Results for this region of zenith angles and threshold energies have been obtained for the first time. The dependence of integral intensity on zenith angle and threshold energy is well fitted by a simple analytical formula.
119824011
Time distribution of electromagnetic and hadronic components in giant EAS
HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Time distribution of electromagnetic and hadronic components in giant EAS J-N. Capdevielle, F. Cohen, A. Aynutdinov, A. Petrukhin
118513317
Cosmic rays and new physics
121417204
Cosmic ray neutrino detection on the ground level
Abstract The Cherenkov water detector with volume 2000 m 3 for registration of ν-induced muons from the bottom hemisphere on the ground level was constructed. First results of muon detection are described. Methods of atmospheric muon flux suppression and possibility to reach the rejection factor necessary for separation of ν-induced muons are discussed.
31393010
Measurement of the Inclusive ep Scattering Cross Section at HERA
Measurements of the inclusive ep scattering cross section are presented in the wide region of four-momentum transfers squared, 0.2 GeV 2 ⩽ Q 2 ⩽ 30000 GeV 2 , and Bjorken x , 4 ⋅ 10 −6 ≲ x ≲ 0.8 . The results are based on data sets collected by the H1 and ZEUS collaborations at HERA. The data include the region of high inelasticity y up to 0.9, which is sensitive to the longitudinal proton structure function F L ( x , Q 2 ) .