Well-tempered n-plet dark matter

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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“…For the discussion of cases of mixing with higher multiplets we refer, for example, to Refs. [339][340][341][342].…”

Section: Dm (Partially) Charged Under Su(2) × U(1)mentioning

confidence: 99%

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

et al. 2018

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“…We will proceed with a brief review of the singlet-triplet model studied in [9,10], emphasizing its possible origins in split supersymmetry. We add to the Standard Model a fermionic singlet χ as well as its fermionic coannihilation partner ψ with quantum numbers (1, 3) 0 under SU(3) × SU(2) × U(1).…”

Section: Singlet-triplet Next-to-minimal Dark Mattermentioning

confidence: 99%

“…In this paper we will study coscattering in one of the simplest models where it can occur, namely, the singlet-triplet next-to-minimal dark matter model of [9,10]. A special case of this model is split supersymmetry [11,12] with a bino-like lightest neutralino and a large higgsino mass parameter.…”

Section: Introductionmentioning

confidence: 99%

Coscattering in next-to-minimal dark matter and split supersymmetry

Brümmer

2020

J. High Energ. Phys.

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In some models of thermal relic dark matter, the relic abundance may be set by inelastic scattering processes (rather than annihilations) becoming inefficient as the universe cools down. This effect has been called coscattering. We present a procedure to numerically solve the full momentum-dependent Boltzmann equations in coscattering, which allows for a precise calculation of the dark matter relic density including the effects of early kinetic decoupling. We apply our method to a simple model, containing a fermionic SU(2) triplet and a fermionic singlet with electroweak-scale masses, at small triplet-singlet mixing. The relic density can be set by either coannihilation or, at values of the mixing angle θ 10 −5 , by coscattering. We identify the parameter ranges which give rise to the observed relic abundance. As a special case, we study bino-like dark matter in split supersymmetry at large µ.

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“…It is then even possible to detect the almost pure Higgsino whose charged component has a decay length shorter than 1 cm. The strategy based on the charged track is also applicable to the case that EWIMP is not dark matter but a coannihilating partner like the gaugino coannihilation [54][55][56]; the search for the EWIMP becomes powerful despite its soft decay products when it is long-lived enough [57] JHEP06(2018)049 Figure 1. Radiative correction from the electroweakly interacting massive particle (EWIMP).…”

Section: Jhep06(2018)049mentioning

confidence: 99%

Indirect probe of electroweakly interacting particles at the high-luminosity Large Hadron Collider

Matsumoto

Shirai

Takeuchi

2018

J. High Energ. Phys.

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Many extensions of the standard model (SM) involve new massive particles charged under the electroweak gauge symmetry. The electroweakly interacting new particles affect various SM processes through radiative corrections. We discuss the possibility of detecting such new particles based on the precise measurement of the SM processes at high energy hadron colliders. It then turns out that Drell-Yan processes receive radiative corrections from the electroweakly interacting particles at the level of O(0.1-10)%. It is hence possible to indirectly search for the Higgsino up to the mass of 400 GeV and the quintet (5-plet) Majorana fermion up to the mass of 1200 GeV at the high-luminosity running of the Large Hadron Collider, if the systematic uncertainty associated with the estimation of the SM background becomes lower than the statistical one.

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Well-tempered n-plet dark matter

Cited by 15 publications

References 52 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

Coscattering in next-to-minimal dark matter and split supersymmetry

Indirect probe of electroweakly interacting particles at the high-luminosity Large Hadron Collider

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