SciPost logo

SciPost Submission Page

Muon puzzle in inclined muon bundles detected by NEVOD-DECOR

by A. G. Bogdanov, N. S. Barbashina, S. S. Khokhlov, V. V. Kindin, R. P. Kokoulin, K. G. Kompaniets, A. Yu. Konovalova, G. Mannocchi, A. A. Petrukhin, V. V. Shutenko, G. Trinchero, V. S. Vorobev, I. I. Yashin, E. A. Yurina, E. A. Zadeba

This Submission thread is now published as

Submission summary

Authors (as registered SciPost users): Aleksei Bogdanov
Submission information
Preprint Link:  (pdf)
Date accepted: 2022-10-12
Date submitted: 2022-08-12 13:11
Submitted by: Bogdanov, Aleksei
Submitted to: SciPost Physics Proceedings
Proceedings issue: 21st International Symposium on Very High Energy Cosmic Ray Interactions (ISVHECRI2022)
Ontological classification
Academic field: Physics
  • Gravitation, Cosmology and Astroparticle Physics
  • High-Energy Physics - Experiment
Approach: Experimental


The data of cosmic ray NEVOD-DECOR experiment on the investigation of inclined muon bundles for a long time period (May 2012 - March 2021) are presented. The analysis showed that the observed intensity of muon bundles at primary cosmic ray energies of about 1 EeV and higher can be compatible with the expectation in frame of widely used hadron interaction models only under the assumption of an extremely heavy mass composition. This conclusion is consistent with data of several experiments on investigations of muon content in air showers, but contradicts the available fluorescence data on Xmax which favor a light mass composition at these energies. In order to clarify the nature of the "muon puzzle", investigations of the muon bundle energy deposit in the detector material were carried out. For the first time, experimental estimates of the average energy of muons in the bundles of inclined air showers initiated by primary particles with energies from 10 to 1000 PeV have been obtained.

Published as SciPost Phys. Proc. 13, 003 (2023)

Reports on this Submission

Anonymous Report 1 on 2022-9-20 (Invited Report)


The paper presents results on muon component of EAS at high energies which is an area of great interest at present.


Nothing specific. It is a fairly complete report.


The paper should be accepted for publication as it is.

  • validity: good
  • significance: high
  • originality: top
  • clarity: good
  • formatting: good
  • grammar: good

Login to report or comment