Conveners
Multicomponent EAS investigations
- Anatoly Petrukhin (National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
Multicomponent EAS investigations
- Yuri Stenkin (INR RAS)
Description
The section will be focused to instruments and experimental methods for studying extensive air showers. The main attention will be paid to investigations of muon and neutron EAS components, as well as to development of techniques of EAS registration by means of Cherenkov light.
The electron-neutron detectors (en-detectors) were developed at INR RAS in the framework of the PRISMA project to study Extensive Air Shower (EAS) hadronic component through thermalized neutrons. By continuous monitoring of neutron background with the en-detectors we have found interesting variations in the environmental thermal neutron flux. Environmental neutrons are produced by two sources:...
New experimental complex of the Tien Shan mountain cosmic ray station incorporates a set of detector subsystems for simultaneous investigation of different components of extensive air showers (EAS) which arise from interaction of the (1-100) PeV cosmic ray particles in atmosphere. Thus, a wide-spread system of the charged particles detectors is used for the measurement of local density of EAS...
Muon puzzle is a growing with cosmic ray energy excess of muons in EAS in comparison with simulations performed using various models of hadron interactions and even assuming a heavy composition of cosmic rays. The main contribution to investigation of the energy dependence of the muon excess was done by NEVOD-DECOR experiment. To separate two possible reasons of muon excess appearance...
The Yakutsk Extensive Air Shower Array has been continuously operating for more than 50 years (since 1970) and up until recently it has been one of world's largest ground-based instruments aimed at studying the properties of cosmic rays in the ultra-high energy domain. In this report we discuss results recently obtained at the array --- on cosmic rays energy spectrum, mass composition and...
The Sydney University Giant Air-shower Recorder (SUGAR) measured the muon component
of extensive air showers from muon-detector readings. Data of SUGAR allows us to reconstruct
the empirical dependence of muon density on the distance from the axis of the shower -lateral
distribution function (LDF). We compare this function with the predictions of hadronic interaction
model QGSJET-II-04 for...
I am presenting an update of the results from the Working group on Hadronic Interactions and Shower Physics (WHISP) on the meta-analysis of muon measurements. In this analysis, muon data from several experiments from a few PeV to tens of EeV were combined and studied in a unified framework. Above 10 PeV, we find a muon excess with respect to simulations for all hadronic interaction models...
Autumn 2018, the working group WHISP had compiled the results of various experiments in which cosmic ray muon bundles were registered. In some experiments, an excess of the number of muons is observed in comparison with Monte-Carlo simulations with different hadronic interaction models at energies of primary nuclei above 10 PeV. However, not all experiments showed an excess. We present a...
By accurate measurement of components and energy spectrum in the knee region, problem of origin of cosmic ray can be solved. In one extensive air shower (EAS), high energy hadrons, which constitute the EAS skeleton as G.T. Zatsepin called it, carry important information for multi-parameter correlation studies. The nuclear reaction between hadrons and matter in the surrounding environment (such...
Using of machine learning (ML) and deep learning (DL) techniques in data analysis becomes a mainstream today and is presented in papers of leading experiments. These modern methods allow sometimes to increase the accuracy of for example mass composition reconstruction significantly. In current work ML and DL are applied for core location, zenith angle estimation, primary energy and mass...
Abstract.
Studying the spectrum of secondary particles at the Large Hadron Collider (LHC) at energies equivalent to 1-100 PeV in the laboratory system, scaling behavior is observed. At the same energies, a number of effects are observed in cosmic rays (CR) that are incompatible with this behavior. In the spectrum of extensive atmospher showers (EAS), a break (knee) is observed at an energy of...
