The Discreet Charm of Higgsino Dark Matter: A Pocket Review

Kowalska, Kamila; Sessolo, Enrico Maria

doi:10.1155/2018/6828560

Cited by 46 publications

(37 citation statements)

References 164 publications

(248 reference statements)

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“…However, if a certain amount of fine tuning is allowed, the neutral higgsinos could have a mass splitting due to arXiv:1901.02987v2 [hep-ph] 17 Jun 2019 non-negligible gaugino mixing, and therefore are not excluded by direct searches due to the absence of vector interactions. In this scenario, the nearly-pure higgsinoonly dark matter with masses around the thermal limit, which is a subject of this paper, is not constrained [14,19] by direct searches due to the small neutralino-nucleon cross section or by indirect searches because of the negligible Sommerfeld enhancement in the annihilation cross section.…”

Section: Introductionmentioning

confidence: 99%

Discovery reach for wino and higgsino dark matter with a disappearing track signature at a 100 TeV pp collider

et al. 2019

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Within the theory of supersymmetry, the lightest neutralino is a dark matter candidate and is often assumed to be the lightest supersymmetric particle (LSP) as well. If the neutral wino or higgsino is dark matter, the upper limit of the LSP mass is determined by the observed relic density of dark matter. If the LSP is a nearly-pure neutral state of the wino or higgsino, the lightest chargino state is expected to have a significant lifetime due to a tiny mass difference between the LSP and the chargino. This article presents discovery potential of the 100 TeV future circular hadron collider (FCC) for the wino and higgsino dark matter using a disappearing-track signature. The search strategy to extend the discovery reach to the thermal limits of wino/higgsino dark matter is discussed with detailed studies on the background rate and the reference design of the FCC-hadron detector under possible running scenarios of the FCC-hadron machine. A proposal of modifying the detector layout and several ideas to improve the sensitivity further are also discussed.

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Section: Introductionmentioning

confidence: 99%

Discovery reach for wino and higgsino dark matter with a disappearing track signature at a 100 TeV pp collider

et al. 2019

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“…4 we compare the results of our scans with the reach of current and planned indirect and direct detection experiments. We stress the importance of CTA to provide coverage of one of the most interesting cases, the ∼ 1 TeV higgsino region, as emphasized in [18] (see also [19,20] for a recent work and review) that otherwise would remain unexplored. Finally, we present our conclusions in Sec.…”

Section: Introductionmentioning

confidence: 92%

Testing dark matter with Cherenkov light — prospects of H.E.S.S. and CTA for exploring minimal supersymmetry

Hryczuk

Jodłowski

Moulin

et al. 2019

J. High Energ. Phys.

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We provide an updated and improved study of the prospects of the H.E.S.S. and Cherenkov Telescope Array (CTA) experiments in testing neutralino dark matter in the Minimal Supersymmetric Standard Model with nine free parameters (p9MSSM). We include all relevant experimental constraints and theoretical developments, in particular a calculation of the Sommerfeld enhancement for both present-day annihilations and the relic abundance. We perform a state-of-the-art analysis of the CTA sensitivity with a loglikelihood test ratio statistics and apply it to a numerical scan of the p9MSSM parameter space focusing on a TeV scale dark matter. We find that, assuming Einasto profile of dark matter halo in the Milky Way, H.E.S.S. has already been able to nearly reach the so-called thermal WIMP value, while CTA will go below it by providing a further improvement of at least an order of magnitude. Both H.E.S.S. and CTA are sensitive to several cases for which direct detection cross section will be below the so-called neutrino floor, with H.E.S.S. being sensitive to most of the wino region, while CTA also covering a large fraction of the ∼ 1 TeV higgsino region. We show that CTA sensitivity will be further improved in the monochromatic photon search mode for both single-component and underabundant dark matter.

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“…We will fix these parameters in the following way: first, we will require the lightest neutral Higgsino to be the dark matter. This not only sets the hierarchy q R > q H , as the lightest Higgsino needs to be the LSP, but requiring that the Higgsino achieves the correct relic abundance also fixes its mass, q H /R 1.1 − 1.2 TeV [6,8]. To set the other two parameters, we impose: i.)…”

Section: The Modelmentioning

confidence: 99%

“…On top of solving the naturalness problem, supersymmetric theories with R parity conservation have naturally candidates for thermal Dark Matter (DM), the neutralinos. A number of recent works [1][2][3][4][5][6] have pointed out that, out of the different neutralino spectra, a nearly pure Higgsino lightest supersymmetric particle (LSP) with a 1.1-1.2 TeV mass range remains as the most phenomenologically appealing candidate to DM 2 The attractiveness of this scenario relies on the fact that its capability to reproduce the observed value of Ωh 2 = 0.1186 ± 0.0020 [7] comes from the gauge interactions of the Higgsino multiplet alone and does not require a delicate mixture of different neutralino states (so-called 'well-tempering') [8].…”

Section: Introductionmentioning

confidence: 99%

Higgsino dark matter in an economical Scherk-Schwarz setup

2019

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We consider a minimal natural supersymmetric model based on an extra dimension with supersymmetry breaking provided by the Scherk-Schwarz mechanism. The lightest supersymmetric particle is a neutral, quasi-Dirac Higgsino and, unlike in previous studies, we assume that all Standard Model fields are propagating in the bulk. The resulting setup is minimal, as neither extra matter, effective operators, nor extra U (1) groups are needed in order to be viable. The model has three free parameters which are fixed by the Higgsino mass -set to the range 1.1-1.2 TeV so it can play the role of Dark Matter, and by the requirements of correct electroweak breaking and the mass of the Higgs. After imposing the previous conditions we find a benchmark scenario that passes all experimental constrains with an allowed range for the supersymmetric parameters. In particular we have found gluinos in the range 2.0-2.1 TeV mass, electroweakinos and sleptons almost degenerate in the range 1.7-1.9 TeV and squarks degenerate in the range 1.9-2.0 TeV. The best discovery prospects are: i.) gluino detection at the high luminosity LHC ( 3 ab −1 ), and ii.) Higgsino detection at next-generation dark matter direct detection experiments. The model is natural, as the fine-tuning for the fixed values of the parameters is moderate mainly because supersymmetry breaking parameters contribute linearly to the Higgs mass parameter, rather than quadratically as in most models. arXiv:1812.08019v2 [hep-ph] 9 Jan 2019 1 Although justice should be done to other BSM theories which also show themselves elusive with respect to experimental searches. 2 We have encoded, in the given Higgsino mass interval, the theoretical uncertainty in the calculation of the thermal relic abundance Ωh 2 : i) There is a small mixing effect of the Higgsino and the wino which tends to increase the annihilation cross-section; ii) There is a small effect of the running of the Higgsino mass between the scale 1/R, where the boundary conditions are set, and the tree level Higgsino mass scale q H /R, by which the Higgsino mass tends to decrease as its beta function is positive.

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The Discreet Charm of Higgsino Dark Matter: A Pocket Review

Cited by 46 publications

References 164 publications

Discovery reach for wino and higgsino dark matter with a disappearing track signature at a 100 TeV pp collider

Discovery reach for wino and higgsino dark matter with a disappearing track signature at a 100 TeV pp collider

Testing dark matter with Cherenkov light — prospects of H.E.S.S. and CTA for exploring minimal supersymmetry

Higgsino dark matter in an economical Scherk-Schwarz setup

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