119407017
Muon bundles produced by UHE cosmic rays at large zenith angles
The first experimental results on a new EAS observable, the local muon density spectra measured with a large area coordinate detector DECOR in a wide range of zenith angles, are presented. These data correspond to the interval of primary particle energies from 1015 to 1018 eV. Some features of local muon density phenomenology are considered on the basis of an analytical model. Expected distributions of the events in the muon density have been calculated by means of the CORSIKA code and compared with experimental data.
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
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.
118513317
Cosmic rays and new physics
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.
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 ) .