2005/08/31 by L. Anchordoqui, Luis Anchordoqui, Tao Han +3 · 2 citations
Physics and Astronomy · #Astronomy #Astrophysics and Cosmic Phenomena #Cosmic ray #Cosmology and Gravitation Theories #Electroweak interaction #Extra dimensions #Gravitation #Graviton #Hypercharge #Muon #Neutrino #Neutrino astronomy #Neutrino detector #Neutrino oscillation #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Pierre Auger Observatory #Solar neutrino #astro-ph #hep-ph
paper · pdf · doi:10.1016/j.astropartphys.2005.10.006
published as Astropart.Phys.25:14-32,2006 · 32 pages (RevTeX); revised to show rates for both the cosmogenic and Waxman-Bahcall neutrino flux; to appear in Astroparticle Physics
arxiv created 2005/10/25 · openalex publication_date 2005/11/30 · arxiv updated 2014/11/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The Pierre Auger Observatory for cosmic rays provides a laboratory for studying fundamental interactions at energies well beyond those available at colliders. In addition to hadrons or photons, Auger is sensitive to ultra-high energy neutrinos in the cosmic radiation and models for new physics can be explored by observing neutrino interactions at center-of-mass energies beyond the TeV scale. By comparing the rate for quasi-horizontal, deeply penetrating air showers triggered by all types of neutrinos with the rate for slightly upgoing showers generated by Earth-skimming tau neutrinos, any deviation of the neutrino-nucleon cross-section from the Standard Model expectation can be constrained. We show that this can test models of low-scale quantum gravity (including processes such as Kaluza-Klein graviton exchange, microscopic black hole production and string resonances), as well as non-perturbative electroweak instanton mediated processes. Moreover, the observed ratios of neutrino flavors would severely constrain the possibility of neutrino decay.