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

0574909 - FZÚ 2024 RIV US eng J - Článek v odborném periodiku
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 … celkem 377 autorů
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
Grant CEP: GA MŠMT LTT18004; GA MŠMT EF16_013/0001402; GA MŠMT(CZ) EF18_046/0016010
Výzkumná infrastruktura: AUGER-CZ II - 90102
Institucionální podpora: RVO:68378271
Klíčová slova: Pierre Auger Observatory * ultra-high-energy * Planckian-interacting massive
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 5, rok: 2022
Způsob publikování: Omezený přístup

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.
Trvalý link: https://hdl.handle.net/11104/0346593