IAP - High-Energy Universe Group Seminar: Miguel Alexandre Martins (EAS vs Accelerator Measurements) (2/15)

Monday Apr 28, 2025, 11:00 AM → 1:00 PM Europe/Berlin

Room 206 (KIT CN Bld 425)

Semester SS 2025

---due to bank holiday seminar moved to early the week---

 

Miguel Alexandre Martins 

Santiag de Compostela, Spain

"New multiparticle production variables: bridging the gap between air-shower observables and accelerator measurements"

Chair: Markus Roth

 

abstract: 

“Ultra-high-energy cosmic rays (UHECRs) interact with atmospheric nuclei at centre-of-mass energies reaching hundreds of TeV, initiating cascades of secondary particles known as Extensive Air Showers (EAS). These interactions offer a unique window into hadronic particle production in regions of phase space beyond the reach of current particle accelerators. This seminar focuses on two key observables of EAS: the atmospheric depth of the shower maximum (Xₘₐₓ) and the number of muons at ground level (Nμ). For proton-induced EAS, a probabilistic model is developed to connect these observables with production variables built from the energy spectra of secondary hadrons of the initial UHECR-air interaction. Crucially, this connection enables the probing of hadronic interactions using air-shower data, independently of the hadronic interaction model. Since collider experiments can access similar secondary spectra, our framework bridges high-energy particle physics and astroparticle physics in a unified framework.”