Speaker
Description
Accurate modelling of the sea-level muon flux is crucial for applications in particle physics, astrophysics, and geophysics, such as detector design and calibration, muon radiography and underground and neutrino physics experiments. While computationally efficient, traditional one-dimensional parameterisations often fall short in capturing the coupled dependencies of muon energy and zenith angle, especially at low energies. This work presents an optimised approach for parameterising the angular and energy distributions of muons using a two-dimensional (2D) fit methodology [1]. By leveraging extensive experimental data, three analytical models (Guan et al. [2], Gaisser et al.[3] and Bugaev-Reyna et al.[4]) were studied to investigate the accuracy of muon flux predictions, particularly in the low-energy regime below 1 GeV. The parameterisations capture key dependencies of muon flux on both energy and zenith angle, addressing limitations in traditional one-dimensional approximations.
The new 2D flux models have been integrated into a Geant4 simulation toolkit via a custom generator, enabling realistic and data-driven muon generation for surface and shallow-depth applications. Validation against benchmark datasets and muographic measurements confirms the models reliability and demonstrates improved agreement with observed flux distributions [1]. This advancement enhances the fidelity of simulations used in cosmic ray studies and supports the development of muon-based imaging and monitoring techniques. The approach is designed to be modular and easily extendable to site-specific flux adjustments or future high-precision datasets.
[1] C. Frosin et al., J. Phys. G: Nucl. Part. Phys. 52, 035002 (2025). https://doi.org/10.1088/1361-6471/adb6c3
[2] M. Guan et al., 2015 arXiv:1509.06176
[3] Gaisser T K, Engel R and Resconi E 2016 Cosmic Rays and Particle Physics 2nd edn (Cambridge University Press)
[4] D. Reyna et al., 2006 arXiv:hep-ph/0604145
Details
Catalin Frosin, Postdoc,
INFN Firenze (Italy),
https://www.fi.infn.it/index.php/it/
| Internet talk | Maybe |
|---|---|
| Is this an abstract from experimental collaboration? | No |
| Name of experiment and experimental site | N/A |
| Is the speaker for that presentation defined? | Yes |