Hamburg 2016 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 83: Kosmische Strahlung

T 83.7: Vortrag

Mittwoch, 2. März 2016, 18:20–18:35, VMP9 SR 30

Analytic investigation of extended Heitler-Matthews model — •Stefan Grimm, Darko Veberič, and Ralph Engel — KIT, http://www.ikp.kit.edu/

Many features of extensive air showers are qualitatively well described by the Heitler cascade model and its extensions. The core of a shower is given by hadrons that interact with air nuclei. After each interaction some of these hadrons decay and feed the electromagnetic shower component. The most important parameters of such hadronic interactions are inelasticity, multiplicity, and the ratio of charged vs. neutral particles. However, in analytic considerations approximations are needed to include the characteristics of hadron production.

We discuss extensions of the simple cascade model by analytic description of air showers by cascade models which include also the elasticity, and derive the number of produced muons. In a second step we apply this model to calculate the dependence of the shower center of gravity on model parameters. The depth of the center of gravity is closely related to that of the shower maximum, which is a commonly-used composition-sensitive observable.