Searching for Dark Matter with the Southern Wide-field Gamma-ray Observatory (SWGO)

Viana, A.; Albert, A.; Harding, J. Patrick; Hinton, Jim; Schoorlemmer, H.; Souza, Vítor de

doi:10.22323/1.395.0555

Cited by 5 publications

(7 citation statements)

References 32 publications

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“…Center, SWGO will be capable of reaching the expected cross-section for DM particles thought to be thermal relics of the Big Bang for a wide range of DM particle mass, annihilation channel, and DM-halo profile shape [12,455] (Section 2.7). The DM flux spectra are characterized by a hard cutoff at the DM mass-observing such a cutoff would be one of the strongest indications that an observed gamma-ray source originates from DM interactions.…”

Section: Search For Dark Matter (Dm) Annihilation/decay Targeting The...mentioning

confidence: 99%

The Future of Gamma-Ray Experiments in the MeV-EeV Range

Engel¹,

Goodman²,

Huentemeyer³

et al. 2022

Preprint

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Naturally occurring particle accelerators shine brightly throughout the universe, inviting us to discover fundamental laws and hone our theories if we look in their directions with the right detectors. Gamma-rays, the most energetic photons, carry information from the far reaches of extragalactic space with minimal interaction or loss of information. They bring messages about particle acceleration in environments so extreme they cannot be reproduced on earth for a closer look. Gamma-ray astrophysics is so complementary with collider work that particle physicists and astroparticle physicists are often one in the same.Gamma-ray instruments, especially the Fermi Gamma-ray Space Telescope, have been pivotal in major multi-messenger discoveries over the past decade. There is presently a great deal of interest and scientific expertise available to push forward new technologies, to plan and build space-and ground-based gamma-ray facilities, and to build multimessenger networks with gamma rays at their core. It is therefore concerning that before the community comes together for planning exercises again, much of that infrastructure could be lost to a lack of long-term planning for support of gamma-ray astrophysics. Gamma-rays with energies from the MeV to the EeV band are therefore central to multiwavelength and multi-messenger studies to everything from astroparticle physics with compact objects, to dark matter studies with diffuse large scale structure.These science goals and the excitement of new discoveries have generated a wave of new gamma-ray facility proposals and programs. Since the legacy of existing facilities is well covered in many other places, this paper highlights new and proposed gamma-ray technologies and facilities that have each been designed to address specific needs in the measurement of extreme astrophysical sources that probe some of the most pressing questions in fundamental physics for the next decade. The proposed instrumentation would also address the priorities laid out in the recent Decadal Survey of Astronomy and Astrophysics (Astro2020), a complementary study by the astrophysics community that provides opportunities also relevant to Snowmass.

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Section: Search For Dark Matter (Dm) Annihilation/decay Targeting The...mentioning

confidence: 99%

The Future of Gamma-Ray Experiments in the MeV-EeV Range

Engel¹,

Goodman²,

Huentemeyer³

et al. 2022

Preprint

Self Cite

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“…Other DM searches with HAWC have been presented in [20,21] focussing on the diffuse gamma-ray background, and clusters of galaxies. [16]. Bottom: Expected upper limits of GRAMS and other experiments on the fractional abundance of PBHs.…”

Section: Pos(icrc2021)047mentioning

confidence: 99%

“…The southern wide field-of-view gamma-ray observatory (SWGO) is a proposed extensive air shower experiment to be located in the southern hemisphere [16]. SWGO will cover energies from 100 GeV up to 100 TeV, it will have a large field of view, and a significantly better sensitivity than HAWC, which is based on a similar concept for gamma-ray detection.…”

Section: Prospects For Future Gamma-ray Detectorsmentioning

confidence: 99%

“…Ref. [16] reported future sensitivities for SWGO to DM signals from the inner galactic halo and dwarf spheroidal galaxies. Fig.…”

Section: Prospects For Future Gamma-ray Detectorsmentioning

confidence: 99%

“…Figure 3: Top: Expected sensitivity of SWGO for DM annihilations. Taken from[16]. Bottom: Expected upper limits of GRAMS and other experiments on the fractional abundance of PBHs.…”

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News on Dark Matter from ICRC 2021

Taoso¹

2021

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

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From WIMPs to FIMPs with low reheating temperatures

Silva-Malpartida,

Bernal,

Jones-Pérez

et al. 2023

J. Cosmol. Astropart. Phys.

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Weakly- and Feebly-Interacting Massive Particles (WIMPs and FIMPs) are among the best-motivated dark matter (DM) candidates. In this paper, we investigate the production of DM through the WIMP and FIMP mechanisms during inflationary reheating. We show that the details of the reheating, such as the inflaton potential and the reheating temperature, have a strong impact on the genesis of DM. The strong entropy injection caused by the inflaton decay has to be compensated by a reduction of the portal coupling in the case of WIMPs, or by an increase in the case of FIMPs. We pinpoint the smooth transition between the WIMP and the FIMP regimes in the case of low reheating temperature. As an example, we perform a full numerical analysis of the singlet-scalar DM model; however, our results are generic and adaptable to other particle DM candidates. Interestingly, in the singlet-scalar DM model with low-reheating temperature, regions favored by the FIMP mechanism are already being tested by direct detection experiments such as LZ and XENONnT.

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Searching for Dark Matter with the Southern Wide-field Gamma-ray Observatory (SWGO)

Cited by 5 publications

References 32 publications

The Future of Gamma-Ray Experiments in the MeV-EeV Range

The Future of Gamma-Ray Experiments in the MeV-EeV Range

News on Dark Matter from ICRC 2021

From WIMPs to FIMPs with low reheating temperatures

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