Pierre Auger Observatory and Super Heavy Dark Matter

Aloisio, Roberto

doi:10.1051/epjconf/202328007001

Cited by 4 publications

(4 citation statements)

References 23 publications

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“…The reach of proposed IceCube-Gen2 will be better and hence, it is expected that IceCube-Gen2 would be able to detect GZK neutrinos. It should be noted that uncertainties in source parameters have little JCAP01(2024)058 impact on the GZK neutrino flux at energies between (10 18 -10 19 ) eV and can be used to calibrate the GZK photon flux for any multi-messenger study.…”

Section: Jcap01(2024)058 6 Summary and Conclusionmentioning

confidence: 99%

“…Note that shock waves produced in supernova explosion could also produce high energy protons upto a few O(10 PeV) [13][14][15][16][17]. In contrast to the bottom-up model, the top-down model leads to the production of UHECRs via exotic sources [18] such as decay of heavy dark matter particles [2,[19][20][21][22][23], topological defects, cosmic strings etc. [see ref.…”

Section: Introductionmentioning

confidence: 99%

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A relook at the GZK neutrino-photon connection: impact of extra-galactic radio background & UHECR properties

Chakraborty,

Mehta,

Sarmah

2024

J. Cosmol. Astropart. Phys.

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Ultra-high energy cosmic rays (UHECRs) beyond the Greisen-Zatsepin-Kuzmin (GZK) cut-off provide us with a unique opportunity to understand the universe at extreme energies. Secondary GZK photons and GZK neutrinos associated with the same interaction are indeed interconnected and render access to multi-messenger analysis of UHECRs. The GZK photon flux is heavily attenuated due to the interaction with Cosmic Microwave Background (CMB) and the Extra-galactic Radio Background (ERB). The present estimate of the ERB comprising of several model uncertainties together with the ARCADE2 radio results in large propagation uncertainties in the GZK photon flux. On the other hand, the weakly interacting GZK neutrino flux is unaffected by these propagation effects. In this work, we make an updated estimate of the GZK photon and GZK neutrino fluxes considering a wide variation of both the production and propagation properties of the UHECR like, the spectral index, the cut-off energy of the primary spectrum, the distribution of sources and the uncertainties in the ERB estimation. We explore the detection prospects of the GZK fluxes with various present and upcoming UHECR and UHE neutrino detectors such as Auger, TA, GRAND, ANITA, ARA, IceCube and IceCube-Gen2. The predicted fluxes are found to be beyond the reach of the current detectors. In future, proposed IceCube-Gen2, Auger upgrade and GRAND experiments will have the sensitivity to the predicted GZK photon and GZK neutrino fluxes. Such detection can put constraints on the UHECR source properties and the propagation effects due to the ERB. We also propose an indirect limit on the GZK photon flux using the neutrino-photon connection for any future detection of GZK neutrinos by the IceCube-Gen2 detector. We find this limit to be consistent with our GZK flux predictions.

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Section: Jcap01(2024)058 6 Summary and Conclusionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A relook at the GZK neutrino-photon connection: impact of extra-galactic radio background & UHECR properties

Chakraborty,

Mehta,

Sarmah

2024

J. Cosmol. Astropart. Phys.

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“…UHECRs are mostly protons and other atomic nuclei; a fraction of photons would be an ideal probe for fundamental questions in particle physics and cosmology, such as the nature of dark matter and the possibility of Lorentz invariance violation. Indeed, the decay of superheavy DM particles could result in large fluxes of UHE Standard Model particles [16], with photons and neutrinos dominating the final state. Also, UHE photons could result from the decay of hadrons produced when protons with ∼ 10 the final photon energy interact with microwave/IR/visible/UV background photons, either within the source environment or during their propagation through the intergalactic medium.…”

Section: Multi-messengersmentioning

confidence: 99%

Ultra-high energy cosmic rays with the Pierre Auger Observatory

Perrone

2023

EPJ Web Conf.

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In the era of multi-messenger astronomy, ultra-high energy cosmic rays offer the unique opportunity to investigate the nature of astrophysical sources and of particle interactions in an energy range far beyond that covered by current particle accelerators. The Pierre Auger Observatory, the world’s largest cosmic ray detector, combines in a hybrid design the information from fluorescence telescopes, observing the longitudinal profile of extensive air showers, with a surface array, measuring the lateral distributions of secondary particles at the ground. A review of selected results is presented, focusing on the measurements of energy spectrum and chemical composition and on the search for neutral primary particles. The future prospects will also be discussed in light of the extensive upgrade program being now implemented to further improve the Observatory potential.

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“…Notable experiments include but are not limited to, AMS-02 [1], Fermi-LAT [2], Icecube [3], ANTARES [4], H.E.S.S. [5], Pierre Auger [6], and VERITAS [7] which have been measuring charged cosmic rays, gamma rays, and neutrinos for decades. With the upcoming construction of new experiments such as KM3Net [8], the CTA observatory [9], and GRAND [10] the sensitivity to potential neutral particles arising from DM annihilation or decay will increase significantly.…”

Section: Introductionmentioning

confidence: 99%

New energy spectra in neutrino and photon detectors to reveal hidden dark matter signals

Beenakker,

Caron,

Kip

et al. 2023

J. High Energ. Phys.

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Neutral particles capable of travelling cosmic distances from a source to detectors on Earth are limited to photons and neutrinos. Examination of the Dark Matter annihilation/decay spectra for these particles reveals the presence of continuum spectra (e.g. due to fragmentation and W or Z decay) and peaks (due to direct annihilations/decays). However, when one explores extensions of the Standard Model (BSM), unexplored spectra emerge that differ significantly from those of the Standard Model (SM) for both neutrinos and photons. In this paper, we argue for the inclusion of important spectra that include peaks as well as previously largely unexplored entities such as boxes and combinations of box, peak and continuum decay spectra.

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Pierre Auger Observatory and Super Heavy Dark Matter

Cited by 4 publications

References 23 publications

A relook at the GZK neutrino-photon connection: impact of extra-galactic radio background & UHECR properties

A relook at the GZK neutrino-photon connection: impact of extra-galactic radio background & UHECR properties

Ultra-high energy cosmic rays with the Pierre Auger Observatory

New energy spectra in neutrino and photon detectors to reveal hidden dark matter signals

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