Higgsino Dark Matter Confronts 14 years of Fermi Gamma Ray Data

Dessert, Christopher; Foster, Joshua W.; Park, Yujin; Xu, Weishuang

doi:10.48550/arxiv.2207.10090

Cited by 5 publications

(7 citation statements)

References 53 publications

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“…For example, the H.E.S.S. Collaboration considered recently [23] an Einasto profile that would strengthen the prospective flux limit on annihilations of an LSP weighing 1 TeV by a factor > 2, and [64] considered a FIRE simulation that would strengthen the limit by a factor > 4. In a spirit of conservatism, here we use an NFW profile for setting constraints from data on the γ flux from near the GC.…”

Section: Limit On γ Flux From the Galactic Centrementioning

confidence: 99%

The CMSSM Survives Planck, the LHC, LUX-ZEPLIN, Fermi-LAT, H.E.S.S. and IceCube

Ellis¹,

Olive²,

Spanos³

et al. 2022

Preprint

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We revisit the viability of the CMSSM, searching for regions of parameter space that yield a neutralino dark matter density compatible with Planck measurements, as well as LHC constraints including sparticle searches and the mass of the Higgs boson, recent direct limits on spin-independent and -dependent dark matter scattering from the LUX-ZEPLIN (LZ) experiment, the indirect constraints from Fermi-LAT and H.E.S.S. on dark matter annihilations to photons in dwarf spheroidal galaxies and the Galactic Centre, and the IceCube limits on muons from annihilations to neutrinos in the Sun. For representative values of tan β and A 0 we map in detail the Planck-compatible strips in CMSSM parameter planes, which exhibit multiple distinctive features for large tan β, A 0 = 0 and µ > 0, and identify portions of the strips that survive all the phenomenological constraints. We find that the most powerful constraint is that from m h , followed by the LZ limit on spin-independent scattering, whereas sparticle searches at the LHC and indirect dark matter searches are less restrictive. Most of the surviving CMSSM parameter space features a Higgsino-like dark matter particle with a mass ∼ 1000 − 1100 GeV, which could best be probed with future direct searches for dark matter scattering.

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Section: Limit On γ Flux From the Galactic Centrementioning

confidence: 99%

The CMSSM Survives Planck, the LHC, LUX-ZEPLIN, Fermi-LAT, H.E.S.S. and IceCube

Ellis¹,

Olive²,

Spanos³

et al. 2022

Preprint

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show abstract

“…In Fig. 13 (top left panel) we illustrate the gamma-ray sky as observed by Fermi with data collected between 2008 and 2022 between 1 GeV and 10 GeV, with data quality cuts as described in [119]. This is a Mollweide projection of the full sky, with the Galactic plane visible in the center horizontal line of the image.…”

Section: Galactic Diffuse Emissionmentioning

confidence: 99%

“…The full analysis, described below, is available as a supplementary jupyter notebook, which includes the pre-processed Fermi data, model, and exposure files. The Fermi data is subject to the data quality cuts and exposure time as described in [119].…”

Section: A Case Study: Segue I With Fermi Gamma-ray Datamentioning

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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“…). Both candidates have been hunted for with state-of-the-art experiments and observatories, and although these searches will continue to achieve important milestones-for example the long sought-after Higgsino may soon be within reach (Rinchiuso et al 2021;Dessert et al 2022)-so far the program has been unsuccessful (for the latest reviews, see, e.g., Gaskins 2016;Boveia & Doglioni 2018;Tao 2020).…”

Section: Introductionmentioning

confidence: 99%

Current and Future γ-Ray Searches for Dark Matter Annihilation Beyond the Unitarity Limit

Tak

Baumgart

Rodd

et al. 2022

ApJL

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For decades, searches for electroweak-scale dark matter (DM) have been performed without a definitive detection. This lack of success may hint that DM searches have focused on the wrong mass range. A proposed candidate beyond the canonical parameter space is ultraheavy DM (UHDM). In this work, we consider indirect UHDM annihilation searches for masses between 30 TeV and 30 PeV—extending well beyond the unitarity limit at ∼100 TeV—and discuss the basic requirements for DM models in this regime. We explore the feasibility of detecting the annihilation signature, and the expected reach for UHDM with current and future very-high-energy (VHE; >100 GeV) γ-ray observatories. Specifically, we focus on three reference instruments: two Imaging Atmospheric Cherenkov Telescope arrays, modeled on VERITAS and CTA-North, and one extended air shower array, motivated by HAWC. With reasonable assumptions on the instrument response functions and background rate, we find a set of UHDM parameters (mass and cross section) for which a γ-ray signature can be detected by the aforementioned observatories. We further compute the expected upper limits for each experiment. With realistic exposure times, the three instruments can probe DM across a wide mass range. At the lower end, it can still have a point-like cross section, while at higher masses the DM could have a geometric cross section, indicative of compositeness.

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Higgsino Dark Matter Confronts 14 years of Fermi Gamma Ray Data

Cited by 5 publications

References 53 publications

The CMSSM Survives Planck, the LHC, LUX-ZEPLIN, Fermi-LAT, H.E.S.S. and IceCube

The CMSSM Survives Planck, the LHC, LUX-ZEPLIN, Fermi-LAT, H.E.S.S. and IceCube

TASI Lectures on the Particle Physics and Astrophysics of Dark Matter

Current and Future γ-Ray Searches for Dark Matter Annihilation Beyond the Unitarity Limit

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