SUSY dark matter(s)

Covi, Laura

doi:10.1007/978-3-662-44172-5_7

Cited by 10 publications

(18 citation statements)

References 152 publications

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“…However, it was shown in [136] that the Zb LbL vertex can be protected from large corrections by a P LR parity symmetry, as long as the b L embedding does not break it, that is, if b L has −1/2 charge under both SU(2) L and SU(2) R . 13 As for the custodial symmetry, when this custodial parity is preserved by the strong sector, corrections to Zb LbL can be kept under control. Both symmetries yield important consequences for the quantum numbers and spectrum of the top partner resonances (for instance extended representations such as the 4 = (2, 2)).…”

Section: Non-universalmentioning

confidence: 99%

“…Both symmetries yield important consequences for the quantum numbers and spectrum of the top partner resonances (for instance extended representations such as the 4 = (2, 2)). Figure 3 reproduced from [137] shows the best fit region with a small positive δg Rb where the following parametrization is used: 14 13 Notice that in symmetry breaking cosets with unbroken SO(4), P LR actually arises as an accidental symmetry of the leading order derivative Lagrangian [96]. 14 There exists another best fit region with a larger negative δg Rb .…”

Section: Non-universalmentioning

confidence: 99%

“…As in the previous section, we parametrize the double interactions of the Higgs by a phenomenological Lagrangian [204] 13) and present in Table 3 the predictions for the MCHM of [31] and the dilatonic Higgs [63]. For the MCHM we omit again the effects of the light SM partners, but we comment on those below.…”

Section: Double-higgs Productionmentioning

confidence: 99%

“…The absence of observation of missing energy events puts strong lower limits on masses of superpartners. The other articles in this volume [7][8][9][10][11][12][13][14] focus on reviewing both the history of and the implications of the Higgs discovery for SUSY. This review focuses on the other viable option: natural electroweak symmetry breaking from strong dynamics, where the strong dynamics produces a light composite Higgs doublet.…”

Section: Introductionmentioning

confidence: 99%

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Composite Higgses

2014

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For the closing article in this volume on supersymmetry, we consider the alternative options to SUSY theories: we present an overview of composite Higgs models in light of the discovery of the Higgs boson. The small value of the physical Higgs mass suggests that the Higgs quartic is likely loop generated; thus models with tree-level quartics will generically be more tuned. We classify the various models (including bona fide composite Higgs, little Higgs, holographic composite Higgs, twin Higgs and dilatonic Higgs) based on their predictions for the Higgs potential, review the basic ingredients of each of them, and quantify the amount of tuning needed, which is not negligible in any model. We explain the main ideas for generating flavor structure and the main mechanisms for protecting against large flavor violating effects, and we present a summary of the various coset models that can result in realistic pseudo-Goldstone Higgses. We review the current experimental status of such models by discussing the electroweak precision, flavor, and direct search bounds, and we comment on the UV completions of such models and on ways to incorporate dark matter.

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Section: Non-universalmentioning

confidence: 99%

Section: Non-universalmentioning

confidence: 99%

Section: Double-higgs Productionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Composite Higgses

2014

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“…This is often referred to as the gravitino problem in cosmology [1,2]. Of course the other possibility is for the gravitinos to be the lightest supersymmetric particle and in that case they can also successfully play the role of Dark Matter [3][4][5][6][7]. We are here instead interested in a different scenario, where the gravitinos are ultra-light, with masses much smaller than the electroweak scale or even the other SM particle masses.…”

Section: Introductionmentioning

confidence: 99%

Model independent limits on an ultralight gravitino from supernovae

Covi

Emken

2015

Phys. Rev. D

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We revisit astrophysical constraints on models with an ultra-light gravitino, in particular extending the analysis to more general models and the case of R-parity breaking. These constraints allow to restrict the value of the gravitino mass depending on the masses of scalar moduli. We perform both a frequentist and bayesian analysis and we find comparable results, even if the bayesian analysis is in part affected by volume effects. Only a small window of gravitino masses can be excluded by the SN constraints in a model-independent way, while limits obtained with a definite assumption on the scalar masses result more stringent.

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Prospects for direct detection of dark matter in an effective theory approach

Catena¹

2014

J. Cosmol. Astropart. Phys.

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We perform the first comprehensive analysis of the prospects for direct detection of dark matter with future ton-scale detectors in the general 11-dimensional effective theory of isoscalar dark matter-nucleon interactions mediated by a heavy spin-1 or spin-0 particle. The theory includes 8 momentum and velocity dependent dark matter-nucleon interaction operators, besides the familiar spin-independent and spin-dependent operators. From a variegated sample of 27 benchmark points selected in the parameter space of the theory, we simulate independent sets of synthetic data for ton-scale Germanium and Xenon detectors. From the synthetic data, we then extract the marginal posterior probability density functions and the profile likelihoods of the model parameters. The associated Bayesian credible regions and frequentist confidence intervals allow us to assess the prospects for direct detection of dark matter at the 27 benchmark points. First, we analyze the data assuming the knowledge of the correct dark matter nucleon-interaction type, as it is commonly done for the familiar spin-independent and spin-dependent interactions. Then, we analyze the simulations extracting the dark matter-nucleon interaction type from the data directly, in contrast to standard analyses. This second approach requires an extensive exploration of the full 11-dimensional parameter space of the dark matter-nucleon effective theory. Interestingly, we identify 5 scenarios where the dark matter mass and the dark matter-nucleon interaction type can be reconstructed from the data simultaneously. We stress the importance of extracting the dark matter nucleon-interaction type from the data directly, discussing the main challenges found addressing this complex 11-dimensional problem.

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SUSY dark matter(s)

Cited by 10 publications

References 152 publications

Composite Higgses

Composite Higgses

Model independent limits on an ultralight gravitino from supernovae

Prospects for direct detection of dark matter in an effective theory approach

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