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Photon decay in UHE air showers: stringent bound on Lorentz violation

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arxiv 2106.01012 v2 pith:WBXBSXGM submitted 2021-06-02 hep-ph astro-ph.HE

Fabian Duenkel , Marcus Niechciol , Markus Risse This is my paper · ORCID
classification hep-phastro-ph.HE
keywords textbounddecaylorentzphotonsshowerviolationbeen
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abstract

In extensive air showers induced by ultra-high-energy (UHE) cosmic rays, secondary photons are expected to be produced at energies far above those accessible by other means. It has been shown that the decay of such photons, as possible in certain theories allowing Lorentz violation, can lead to significant changes of the shower development. Based on observations of the average depth of the shower maximum $\left<X_\text{max}\right>$, a stringent bound on Lorentz violation has been placed in a previous work. Here we include the shower-to-shower fluctuations $\sigma(X_\text{max})$ as an additional observable. The combined comparison of $\left<X_\text{max}\right>$ and $\sigma(X_\text{max})$ to shower observations allows a much stricter test of the possible decay of UHE photons, improving the previous bound by a factor of 50.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Constraining Lorentz invariance violation from the depth of air-shower maximum

    astro-ph.HE 2026-08 conditional novelty 6.0 of 10

    A simulation-based toy analysis of Auger Xmax data yields M_LIV > 1.5e21 GeV (95% CL) for subluminal photon-sector Lorentz invariance violation, subject to simplified detector and composition assumptions.

  2. Vacuum Cherenkov radiation for nonminimal dimension-5 Lorentz violation

    hep-ph 2025-08 conditional novelty 6.0 of 10

    Isotropic dimension-5 Lorentz violation in fermions is constrained to below 1e-18 GeV^-1 (proton, m-type) and 3e-28 GeV^-1 (proton, a-type) by the absence of vacuum Cherenkov radiation in cosmic rays.

  3. Various constraints on BSM physics from extensive air showers and from ultra-high energy gamma-ray and neutrino searches

    astro-ph.HE 2025-01 conditional novelty 1.0 of 10

    A faithful review of the strongest current bounds on Lorentz violation, superheavy dark matter, cosmic strings, and sterile neutrinos from ultra-high-energy cosmic-ray, gamma-ray, and neutrino searches.

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