From collider to cosmic rays: Pythia 8/Angantyr for air shower simulations in CORSIKA 8
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| Format: | Preprint |
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2025
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| _version_ | 1866911163118256128 |
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| author | Gaudu, Chloé Reininghaus, Maximilian Riehn, Felix |
| author_facet | Gaudu, Chloé Reininghaus, Maximilian Riehn, Felix |
| contents | The simulation of extensive air showers is pivotal for advancing our understanding of high-energy cosmic ray interactions in Earth's atmosphere. The CORSIKA 8 framework is being developed as a modern, flexible, and efficient tool for simulating these interactions with a variety of high-energy hadronic models. We present the ongoing implementation and validation of Pythia 8/Angantyr within CORSIKA 8. Pythia 8, successfully used in collider physics, provides a detailed and well-tested treatment of hadronic interactions, while the Angantyr model extends its capabilities to describe heavy-ion collisions in a consistent manner. With the inclusion of Pythia 8, the CORSIKA 8 suite now enables further tuning possibilities, improving the exploration of hadronic interactions in air showers.
In this contribution, we compare the capability of Pythia 8/Angantyr to reproduce fundamental observables of high-energy particle collisions $-$ inelastic cross-sections and multiplicities $-$ to that of several established high-energy interaction models in air shower simulations. We further compare the predictions for key air shower properties, including longitudinal shower development and muon content, for iron-induced shower. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2508_08793 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | From collider to cosmic rays: Pythia 8/Angantyr for air shower simulations in CORSIKA 8 Gaudu, Chloé Reininghaus, Maximilian Riehn, Felix High Energy Astrophysical Phenomena The simulation of extensive air showers is pivotal for advancing our understanding of high-energy cosmic ray interactions in Earth's atmosphere. The CORSIKA 8 framework is being developed as a modern, flexible, and efficient tool for simulating these interactions with a variety of high-energy hadronic models. We present the ongoing implementation and validation of Pythia 8/Angantyr within CORSIKA 8. Pythia 8, successfully used in collider physics, provides a detailed and well-tested treatment of hadronic interactions, while the Angantyr model extends its capabilities to describe heavy-ion collisions in a consistent manner. With the inclusion of Pythia 8, the CORSIKA 8 suite now enables further tuning possibilities, improving the exploration of hadronic interactions in air showers. In this contribution, we compare the capability of Pythia 8/Angantyr to reproduce fundamental observables of high-energy particle collisions $-$ inelastic cross-sections and multiplicities $-$ to that of several established high-energy interaction models in air shower simulations. We further compare the predictions for key air shower properties, including longitudinal shower development and muon content, for iron-induced shower. |
| title | From collider to cosmic rays: Pythia 8/Angantyr for air shower simulations in CORSIKA 8 |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2508.08793 |