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Cosmological implications of photon-flux upper limits at ultrahigh energies in scenarios of Planckian-interacting massive particles for dark matter

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    0574909 - FZÚ 2024 RIV US eng J - Journal Article
    Abreu, P. - Aglietta, M. - Albury, J.M. - Bakalová, Alena - Blažek, Jiří - Boháčová, Martina - Chudoba, Jiří - Ebr, Jan - Hamal, Petr - Janeček, Petr - Juryšek, Jakub - Mandát, Dušan - Müller, Ana Laura - Palatka, Miroslav - Pech, Miroslav - Prouza, Michael - Řídký, Jan - dos Santos, Eva M. Martins - Schovánek, Petr - Tobiška, Petr - Trávníček, Petr - Vícha, Jakub - Yushkov, Alexey … Total 377 authors
    Cosmological implications of photon-flux upper limits at ultrahigh energies in scenarios of Planckian-interacting massive particles for dark matter.
    Physical Review D. Roč. 107, č. 4 (2023), č. článku 042002. ISSN 2470-0010. E-ISSN 2470-0029
    R&D Projects: GA MŠMT LTT18004; GA MŠMT EF16_013/0001402; GA MŠMT(CZ) EF18_046/0016010
    Research Infrastructure: AUGER-CZ II - 90102
    Institutional support: RVO:68378271
    Keywords : Pierre Auger Observatory * ultra-high-energy * Planckian-interacting massive
    OECD category: Astronomy (including astrophysics,space science)
    Impact factor: 5, year: 2022
    Method of publishing: Limited access

    Using the data of the Pierre Auger Observatory, we report on a search for signatures that would be suggestive of super-heavy particles decaying in the Galactic halo. From the lack of signal, we present upper limits for different energy thresholds above greater than or similar to 108 GeV on the secondary by-product fluxes expected from the decay of the particles. Assuming that the energy density of these super-heavy particles matches that of dark matter observed today, we translate the upper bounds on the particle fluxes into tight constraints on the couplings governing the decay process as a function of the particle mass. Instantons, which are nonperturbative solutions to Yang-Mills equations, can give rise to decay channels otherwise forbidden and transform stable particles into metastable ones. Assuming such instanton-induced decay processes, we derive a bound on the reduced coupling constant of gauge interactions in the dark sector: alpha X < 0.09, for 109 < MX=GeV < 1019.
    Permanent Link: https://hdl.handle.net/11104/0346593

     
     
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