Cosmic-ray signatures of dark matter from a flavor dependent gauge symmetry model with neutrino mass mechanism

Motz, H.; Okada, Hiroshi; Asaoka, Y.; Kohri, Kazunori

doi:10.1103/physrevd.102.083019

Cited by 5 publications

(3 citation statements)

References 83 publications

(99 reference statements)

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“…Additional possibilities have also been explored, but so far the reason for the discrepancy remains unsolved. Knowledge of the low-energy cosmic ray energy spectra has contributed to a variety of other studies as well, including those which use of 𝛾-rays to probe the GeV to TeV spectra at different locations in the galaxy [38,39] and even to provide novel constraints for models of Dark Matter [40,41,42,43].…”

Section: The Low-energy Very Local Interstellar Spectramentioning

confidence: 99%

Nearly a Decade of Cosmic Ray Observations in the Very Local Interstellar Medium

Rankin¹

2022

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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In 2012, the centennial year of the discovery of cosmic rays, Voyager 1 crossed the heliopause and began making the very first in-situ measurements of the surrounding interstellar medium. Joined by Voyager 2 in 2018, these twin spacecraft continue to provide critical data of cosmic rays in a surprising, previouslyunexplored plasma regime. Here, we highlight some of the discoveries and insights that have emerged from nearly a decade of cosmic ray observations in the very local interstellar medium, addressing topics such as: i) the behavior of cosmic rays at the heliopause boundary, ii) the characteristics of the low-energy spectrum (down to a few MeV/nuc), iii) the discovery of a time-varying, species-dependent anisotropy, and iv) their relationship to solar-transients that pass through the heliosphere and transmit pressure waves into the VLISM.

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Section: The Low-energy Very Local Interstellar Spectramentioning

confidence: 99%

Nearly a Decade of Cosmic Ray Observations in the Very Local Interstellar Medium

Rankin¹

2022

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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“…The astrophysical background for the positron spectrum is limited to pulsars and secondary particles, but it reaches only up to 1 TeV, while the background for the all-electron spectrum which extends up to 4.8 TeV includes also SNRs. This work improves over previously used methods [3][4][5][6], in that all the primary astrophysical background is calculated as the overlapping spectra from randomly generated populations of SNRs and pulsars throughout the galaxy, replicating the spectral structures expected from this origin. This addresses the issue of assuming a potentially too smooth background spectrum in the case of a power law parametrization for all or part of the SNR and pulsar populations.…”

Section: Introductionmentioning

confidence: 99%

Dark Matter Limits from the CALET Electron+Positron Spectrum with Individual Astrophysical Source Background

Motz,

Adriani,

Akaike

et al. 2023

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)

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The ISS-based Calorimetric Electron Telescope (CALET) is directly measuring the energy spectrum of electron+positron cosmic rays up to 20 TeV. Annihilation or decay of dark matter (DM) could produce signatures in the positron and electron cosmic-ray spectra, thus the parameter space of DM candidate models can be probed by studying these messengers. The TeV-region extension of the spectrum provided by CALET is especially important for heavy DM search, since the signature's location in energy is closely correlated with the DM mass. The magnet spectrometer AMS-02 on the other hand provides an exclusive positron-only spectrum below the TeV range. The combined analysis of both data-sets allows for DM search with a sophisticated modeling of the astrophysical background, comprising pulsars as the primary positron source and supernova remnant (SNR) sources providing the majority of the electron flux, in addition to a secondary component. As a refinement over a phenomenological power-law parametrization of the background, overlapping individual point source spectra are used as background for deriving limits on DM annihilation and decay from the CALET all-electron and the AMS-02 positron-only data. The used SNR and pulsar samples combine known nearby sources dominating the spectrum at high energies with randomly generated ones throughout the galaxy. By analyzing a large number of samples with also randomized emission spectra parameters, the expected variability of the background is taken into account, improving the reliability of the obtained limits on DM annihilation cross-section and lifetime.

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Section: Introductionmentioning

confidence: 99%

Constraints on heavy dark matter annihilation and decay from electron and positron cosmic ray spectra

Motz

2023

SciPost Phys. Proc.

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Annihilation or decay of dark matter (DM) could contribute to the electron and positron cosmic-ray flux, allowing for constraints on DM parameters from its measurement. CALET is directly measuring the energy spectrum of electron+positron cosmic rays up into the TeV region most important for studying heavy DM, while AMS-02 provides a positron-only spectrum below the TeV range. Limits on DM annihilation and decay well into the TeV mass range have been derived from a combined analysis of both data-sets with an astrophysical background model including pulsars as the origin of the positron excess and individual nearby supernova remnant sources.

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Cosmic-ray signatures of dark matter from a flavor dependent gauge symmetry model with neutrino mass mechanism

Cited by 5 publications

References 83 publications

Nearly a Decade of Cosmic Ray Observations in the Very Local Interstellar Medium

Nearly a Decade of Cosmic Ray Observations in the Very Local Interstellar Medium

Dark Matter Limits from the CALET Electron+Positron Spectrum with Individual Astrophysical Source Background

Constraints on heavy dark matter annihilation and decay from electron and positron cosmic ray spectra

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