Heavy neutralino relic abundance with Sommerfeld enhancements — a study of pMSSM scenarios

Beneke, Μ.; Hellmann, C.; Ruiz-Femenía, Pedro

doi:10.1007/jhep03(2015)162

Cited by 52 publications

(91 citation statements)

References 35 publications

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“…28 in the bi-dimensional plane (m ψ 1 , σ SI ψ 1 p ). The plot shows also the current and expected limits by 38 The maximal value of the DM mass is actually higher because of Sommerfeld enhancement [352][353][354]. For simplicity we have neglected this effect since it would marginally influence the discussion.…”

Section: Majorana Dmmentioning

confidence: 90%

The waning of the WIMP? A review of models, searches, and constraints

et al. 2018

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Weakly Interacting Massive Particles (WIMPs) are among the best-motivated dark matter candidates. No conclusive signal, despite an extensive search program that combines, often in a complementary way, direct, indirect, and collider probes, has been detected so far. This situation might change in near future due to the advent of one/multi-TON Direct Detection experiments. We thus, find it timely to provide a review of the WIMP paradigm with focus on a few models which can be probed at best by these facilities. Collider and Indirect Detection, nevertheless, will not be neglected when they represent a complementary probe.

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Section: Majorana Dmmentioning

confidence: 90%

The waning of the WIMP? A review of models, searches, and constraints

et al. 2018

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“…We follow a general formalism developed for SUSY in ref. [24][25][26][27] to calculate absorptive Wilson coefficients and non-relativistic potentials between various two-body states, and we numerically solve resulting Schrödinger equations to obtain SRT effects.…”

Section: Jhep01(2017)009mentioning

confidence: 99%

“…Well below the threshold, SRT effects are independent on the DM velocity as the W -boson exchange in χ 0 χ 0 → χ + χ − becomes governed by the W -mass rather than the DM momentum [13,14,27], depicted as vertical regions of enhancement. The SRT effect saturates at finite enhancement in the v → 0 limit because of the finite-ranged W -exchange Yukawa potential.…”

Section: Jhep01(2017)009mentioning

confidence: 99%

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Very Degenerate Higgsino Dark Matter

Chun¹,

Jung²,

Park³

2017

J. High Energ. Phys.

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We present a study of the Very Degenerate Higgsino Dark Matter (DM), whose mass splitting between the lightest neutral and charged components is O(1) MeV, much smaller than radiative splitting of 355 MeV. The scenario is realized in the minimal supersymmetric standard model by small gaugino mixings. In contrast to the pure Higgsino DM with the radiative splitting only, various observable signatures with distinct features are induced. First of all, the very small mass splitting makes (a) sizable Sommerfeld enhancement and Ramsauer-Townsend (RT) suppression relevant to ∼1 TeV Higgsino DM, and (b) Sommerfeld-Ramsauer-Townsend effect saturate at lower velocities v/c 10 −3 . As a result, annihilation signals can be large enough to be observed from the galactic center and/or dwarf galaxies, while the relative signal sizes can vary depending on the locations of Sommerfeld peaks and RT dips. In addition, at collider experiments, stable chargino signatures can be searched for to probe the model in the future. DM direct detection signals, however, depend on the Wino mass; even no detectable signals can be induced if the Wino is heavier than about 10 TeV.

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“…The effects giving rise to this are twofold. First, one has to take into account the so-called Sommerfeld effect, which is generated by the electroweak Yukawa force acting on the DM particles prior to their annihilation [13][14][15][16]. Secondly, for heavy DM annihilation into energetic particles, electroweak Sudakov (double) logarithms O((α 2 ln 2 (m χ /m W ))) are large and need to be resummed to all orders in the coupling constant [17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Precise yield of high-energy photons from Higgsino dark matter annihilation

Beneke

Hasner

Urban

et al. 2020

J. High Energ. Phys.

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The impact of electroweak Sudakov logarithms on the endpoint of the photon spectrum for wino dark matter annihilation was studied intensively over the last several years. In this work, we extend these results to Higgsino dark matter χ 0 1 . We achieve NLL' resummation accuracy for narrow and intermediate spectral energy resolutions, of order m 2 W /m χ and m W , respectively. This is the most accurate prediction to date for the yield of high-energy γ-rays from χ 0 1 χ 0 1 → γ + X annihilation for the energy resolutions realized by current and next-generation telescopes. We also discuss for the first time the effect of power corrections in m W /m χ in this context and argue why they are not sizeable.

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Heavy neutralino relic abundance with Sommerfeld enhancements — a study of pMSSM scenarios

Cited by 52 publications

References 35 publications

The waning of the WIMP? A review of models, searches, and constraints

The waning of the WIMP? A review of models, searches, and constraints

Very Degenerate Higgsino Dark Matter

Precise yield of high-energy photons from Higgsino dark matter annihilation

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