Snowmass2021 Cosmic Frontier White Paper: Puzzling Excesses in Dark Matter Searches and How to Resolve Them

Leane, Rebecca K.; Shin, Seodong; Yang, Lijian; Adhikari, G.; Alhazmi, Haider; Aramaki, T.; Baxter, Daniel; Calore, Francesca; Caputo, R.; Cholis, Ilias; Daylan, Tansu; Mauro, Mattia Di; Doetinchem, P. von; Han, Ke; Horiuchi, Shunsaku; Kim, Doojin; Kong, Kyoungchul; Lang, R. F.; Qi, Lin; Linden, Tim; Liu, Jianglai; Macías, Óscar; Mishra-Sharma, Siddharth; Murphy, Alexander B.; Rajaee, Meshkat; Rodd, Nicholas L.; Parikh, Aditya; Park, Jong Chul; Sarsa, Maria Luisa; Shockley, E.; Slatyer, Tracy R.; Takhistov, Volodymyr; Wagner, Félix; Ye, J.; Zaharijaš, Gabrijela; Zhong, Yiming; Zhou, N.; Zhou, Xiaopeng

doi:10.48550/arxiv.2203.06859

Cited by 12 publications

(13 citation statements)

References 273 publications

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“…For example, according to some of the most recent dSphs analyses with Fermi data the best-fit cross-section to explain the GCE is essentially on top of the 95% upper limit from a stacked dSphs analysis [51], though within uncertainties the dSphs do not completely rule out the DM interpretation of the GCE. The DM interpretation of the GCE is also in mild tension with null results from nearby galaxy groups [55] and cosmic ray probes (seee [107] for an extended discussion).…”

Section: Dm Annihilation and Decay Formalismmentioning

confidence: 98%

“…The Fermi GCE is a good case study for the utility of the dSphs and extragalactic halos in constraining models of annihilating DM. The GCE is a spherically symmetric excess of continuum gamma-rays observed around the center of the Galaxy that could be due to annihilating DM [26,[102][103][104][105][106] (see [107] for a recent overview). Interpreted in the context of annihilating DM the GCE prefers a near-thermal annihilation cross-section 𝜎𝑣 ∼ 2 × 10 −26 cm 3 /s, and -depending on the final state -a DM mass around 10's -100 GeV.…”

Section: Dm Annihilation and Decay Formalismmentioning

confidence: 99%

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TASI Lectures on the Particle Physics and Astrophysics of Dark Matter

Safdi

2023

Preprint

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These lecture notes on the particle physics and astrophysics of dark matter (DM) were delivered at TASI 2022 "Ten Years After the Higgs Discovery: Particle Physics Now and Future." The focus of these lecture notes, aimed at the level of advanced graduate students and beginning postdocs, is on indirect (i.e., astrophysical and cosmological) probes of particle DM models. While DM models and indirect detection are broadly discussed, the examples of weakly interacting massive particles (WIMPs) and axions are worked out in detail. The topics covered include: the role of DM in the cosmology and astrophysics of structure formation, including DM density profiles in galaxies, general constraints on particle DM models, the theory of minimal DM, with the higgsino as a relevant and illustrative example, indirect detection with gamma-rays, including with the upcoming Cherenkov Telescope Array, axions as a solution to the strong-CP problem and a DM candidate, including discussions of possible ultraviolet completions and of axion string cosmology, and astrophysical probes of axions such as with isocurvature perturbations, 𝑁 eff , black hole superradiance, radio telescopes, spectral modulations, stellar polarization, and stellar cooling, amongst other topics. Example Jupyter notebooks are provided that walk the reader through relevant analyses, including an example statistical analysis of a DM annihilation search towards the Segue I dwarf galaxy with gamma-ray data from the Fermi Large Area Telescope that is relevant for DM explanations of the Fermi Galactic Center Excess. We also provide an introduction to frequentist statistics for particle and astro-particle physics. These lecture notes are meant to be pedagogical, with the focus on explaining the underlying physical principles and analysis techniques that are set to play crucial roles in the search for particle DM in the coming decade.

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Section: Dm Annihilation and Decay Formalismmentioning

confidence: 98%

Section: Dm Annihilation and Decay Formalismmentioning

confidence: 99%

TASI Lectures on the Particle Physics and Astrophysics of Dark Matter

Safdi

2023

Preprint

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“…The detection of CR antiparticles has long been used as a window for indirect searches of dark matter, in particular for WIMPs. However, no clear signature from decay or annihilation of a dark matter particle has been detected so far [1]. What is more, the measurements of antiparticles spectra have revealed our lack of knowledge on their astrophysical production (either produced by sources, like pulsars [2] or primordial black holes [3], or produced from the interactions of CRs with gas [4]) and their transport throughout the Galaxy.…”

Section: Dark Matter Indirect Searches With Cr Antiparticlesmentioning

confidence: 99%

Anti-nuclei predictions from antiproton-motivated models

Luque¹,

Winkler²,

Linden³

2023

Proceedings of 27th European Cosmic Ray Symposium — PoS(ECRS)

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The measurement of antiparticles in cosmic rays (CRs) has revealed our limited knowledge on their production and propagation throughout the Galaxy. Even the first tentative antinuclei events detected by AMS-02 are generating a remarkable debate in the community. In particular, early analyses of the AMS-02 antiproton spectrum revealed the possibility of an anomaly that fit very well with the expected production from a weakly interacting massive particle (WIMP). We present here an antiproton analysis in combination with different ratios of B, Be and Li and use these models to update expectations on the flux of antinuclei with newly derived cross sections and WIMP annihilation spectra. We find that the expected antideuteron flux is compatible with the hint of a few events detected by AMS-02 while the derived flux of antihelium is still around one order of magnitude below the current sensitivity of AMS-02. This, if the preliminary signal of antihelium events detected is confirmed, opens a window for new astrophysical production mechanisms and physics beyond the standard model.

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“…The detailed analyses are cited as Refs [34]-[43] in Ref. [1], and a more extensive discussion and set of references is given in a recent Snowmass review [9].…”

Section: Pos(ichep2022)988mentioning

confidence: 99%

Indirect detection, direct detection, and collider detection cross-sections for a 70 GeV dark matter WIMP

Allen¹,

Tallman²,

Boone³

et al. 2022

Proceedings of 41st International Conference on High Energy Physics — PoS(ICHEP2022)

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Assuming a dark matter fraction Ω 𝐷 𝑀 = 0.27 and a reduced Hubble constant ℎ = 0.73, we obtain a value of 70 GeV/c 2 for the mass of the dark matter WIMP we have previously proposed. We also obtain a value for the annihilation cross section given by ⟨𝜎 𝑎𝑛𝑛 𝑣⟩ = 1.19 × 10 −26 cm 3 /s in the present universe, consistent with the current limits for dwarf spheroidal galaxies. Both the mass and cross-section are consistent with analyses of the Galactic-center gamma rays observed by Fermi-LAT and the antiprotons observed by AMS-02 if these data are interpreted as resulting from dark matter annihilation. The spin-independent cross-section for direct detection in Xe-based experiments is estimated to be slightly above 10 −48 cm 2 , presumably just within reach of the LZ and XENONnT experiments with ≳ 1000 days of data taking. The cross-section for production in high-energy proton collisions via vector boson fusion is estimated to be ∼ 1 femtobarn, possibly within reach of the high-luminosity LHC, with ≥ 140 GeV of missing energy accompanied by two jets.

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Snowmass2021 Cosmic Frontier White Paper: Puzzling Excesses in Dark Matter Searches and How to Resolve Them

Cited by 12 publications

References 273 publications

TASI Lectures on the Particle Physics and Astrophysics of Dark Matter

TASI Lectures on the Particle Physics and Astrophysics of Dark Matter

Anti-nuclei predictions from antiproton-motivated models

Indirect detection, direct detection, and collider detection cross-sections for a 70 GeV dark matter WIMP

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