Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 101: Cosmic Ray 6
T 101.6: Vortrag
Donnerstag, 24. März 2022, 17:30–17:45, T-H33
Vacuum-Cherenkov radiation in UHE air showers: a way of probing Lorentz violation — •Fabian Duenkel, Marcus Niechciol, and Markus Risse — Center for Particle Physics Siegen, Experimentelle Astroteilchenphysik, Universität Siegen
In extensive air showers induced by ultra-high energy (UHE) cosmic rays, secondary electrons are expected to be produced at energies far above those accessible by other means. Those high energies can be used to search for new physics, in particular we study the effects of isotropic, nonbirefringent Lorentz violation in the photon sector. In the case of a photon velocity which is larger than the maximum attainable velocity of standard Dirac fermions, vacuum-Cherenkov radiation becomes possible, which can lead to significant changes of the shower development. Implementing this Lorentz-violating effect in air shower simulations, we present first results on the impact on the shower development, specifically on the average atmospheric depth of the shower maximum <Xmax> and its shower-to-shower fluctuations σ(Xmax).
This work is supported by the Deutsche Forschungsgemeinschaft (DFG).