[tw-hepnet] NCTS Seminar - Particle Physics Journal Club 2026/03/16 (Mon.) 12:30

[Yu-Rou Tsang]

***NCTS Seminar***

Particle Physics Journal Club

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Speaker: Dr. Stefan Froese (Academia Sinica)

Talk title: Atmospheric Lepton Fluxes with MCEq

Time: 2026/03/16 (Mon.) 12:30

Place: NCTS Physics 4F Lecture Hall, Cosmology Hall, NTU

 

Abstract:
Cosmic rays originating from astrophysical sources continuously penetrate the atmosphere producing cascades of hadrons and leptons. Accurately modeling these atmospheric lepton fluxes plays a crucial role for the discovery of astrophysical neutrino signals or neutrino oscillation studies. Although often presented as contaminating background, these fluxes offer a unique way of probing hadronic interaction models, underpin applications such as muon tomography, enable searches for beyond-standard-model particles, and permit study of their seasonal variations.
In this talk, I will present the latest update of the modeling code MCEq (Matrix Cascade Equations) capable of calculating aforementioned fluxes. With a newly updated database MCEq allows to predict the impact of latest hadronic interaction models such as SIBYLL2.3E, QGSJETIII, and EPOS-LHC-R. I will illustrate the relevance of these updates across key applications of MCEq, from atmospheric neutrino background modeling to muon flux predictions.