6–11 Jun 2021
Underline Conference System
America/Toronto timezone
Welcome to the 2021 CAP Congress Program website! / Bienvenue au siteweb du programme du Congrès de l'ACP 2021!

(G*) A Modern High-Precision Calculation of Deep Underground Cosmic Ray Muons

10 Jun 2021, 17:05
10m
Underline Conference System

Underline Conference System

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle) Particle Physics / Physique des particules (PPD) R4-4 Calibration and Analysis for rare event searches (PPD) / Calibration et analyse pour la recherche d'événements rares (PPD)

Speaker

Mr William Woodley (University of Alberta)

Description

We present a new efficient calculation to propagate cosmic ray muons from the surface of the Earth to deep underground laboratories, allowing us to look at the physics and performance of various models of high-energy cosmic rays. The evolution of cosmic rays in the Earth's atmosphere is computed with MCEq (Matrix Cascade Equation), taking into account different combinations of primary and hadronic interaction models in order to calculate the muon flux at the surface. The latter serves as an input for the Monte Carlo code PROPOSAL (Propagator with Optimal Precision and Optimised Speed for All Leptons) to propagate the muons through the rock. A forward prediction for underground muon spectra at different slant depths, including the muon survival probabilities and underground energy spectra, is calculated with very high precision. The reliability of this state-of-the-art calculation was achieved by comparing the results obtained for the vertical muon intensity and total muon flux with the measured data at various underground sites with both flat overburdens and mountains. The implications of the results as well as the seasonal variation of the muon flux will also be discussed.

Primary author

Mr William Woodley (University of Alberta)

Co-authors

Marie-Cécile Piro (University of Alberta) Anatoli Fedynitch (ICRR, The University of Tokyo)

Presentation materials