Dark Matter, Constrained Minimal Supersymmetric Standard Model, and Lattice QCD

Giedt, Joel; Thomas, A. W.; Young, R.

doi:10.1103/physrevlett.103.201802

Cited by 197 publications

(166 citation statements)

References 29 publications

(31 reference statements)

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“…We view the lattice determination of f s to be most accurate (especially in light of the new, lower, value for Σ πN ) and throughout this paper we have used the value of Giedt et al We note that Figure 18: The effect of f s on the Higgs-mediated SI cross-section, which is proportional to f 2 . We show the lattice determinations of f s from Giedt et al [20] and more recent groups [73,74,75,76], as well as the value of f s resulting from the most recent measurement of Σ πN [77]. The bands indicate the stated ±1σ errors on the Giedt and Σ πN values, which are in agreement up to these errors.…”

Section: A Strange Quark Content Of the Nucleonsupporting

confidence: 64%

“…The MicrOMEGAs [51] default value, f s = 0.26, is chosen to be near the 1σ lower bound based on these measurements of Σ πN . However, as first pointed out by Giedt et al [20], direct lattice determinations of f s lead to a significantly smaller value, f s = 0.0532 ± 0.0085. More recent lattice results [73,74,75,76] confirm small values, finding f s between 0.009 − 0.046.…”

Section: A Strange Quark Content Of the Nucleonmentioning

confidence: 85%

“…Note that σ SI depends on nuclear form factors, in particular the strange quark content of the nucleon. For our analysis we adopt the lattice values of [20]. A more technical discussion of the strange quark content of the nucleon is contained in App.…”

Section: Observational Constraintsmentioning

confidence: 99%

“…Throughout, our analysis takes f u = f d = 0.025 [20]. Traditionally [72], f s was determined using chiral perturbation theory to relate f s to the pion-nucleon sigma term, Σ πN , which is extracted experimentally from the cross-section for low-energy pion nucleon scattering, leading to f s = 0.38 ± 0.10.…”

Section: A Strange Quark Content Of the Nucleonmentioning

confidence: 99%

“…Direct detection limits depend on the strange quark content of the nucleon, f s , and we use the lattice values [20] for our analysis. In App.…”

Section: Introductionmentioning

confidence: 99%

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Prospects and blind spots for neutralino dark matter

Cheung

Hall²,

Pinner³

et al. 2013

J. High Energ. Phys.

198

271

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Using a simplified model framework, we assess observational limits and discovery prospects for neutralino dark matter, taken here to be a general admixture of bino, wino, and Higgsino. Experimental constraints can be weakened or even nullified in regions of parameter space near 1) purity limits, where the dark matter is mostly bino, wino, or Higgsino, or 2) blind spots, where the relevant couplings of dark matter to the Z or Higgs bosons vanish identically. We analytically identify all blind spots relevant to spin-independent and spin-dependent scattering and show that they arise for diverse choices of relative signs among M 1 , M 2 , and µ. At present, XENON100 and IceCube still permit large swaths of viable parameter space, including the well-tempered neutralino. On the other hand, upcoming experiments should have sufficient reach to discover dark matter in much of the remaining parameter space. Our results are broadly applicable, and account for a variety of thermal and non-thermal cosmological histories, including scenarios in which neutralinos are just a component of the observed dark matter today. Because this analysis is indifferent to the fine-tuning of electroweak symmetry breaking, our findings also hold for many models of neutralino dark matter in the MSSM, NMSSM, and Split Supersymmetry. We have identified parameter regions at low tan β which sit in a double blind spot for both spin-independent and spin-dependent scattering. Interestingly, these low tan β regions are independently favored in the NMSSM and models of Split Supersymmetry which accommodate a Higgs mass near 125 GeV.1

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Section: A Strange Quark Content Of the Nucleonsupporting

confidence: 64%

Section: A Strange Quark Content Of the Nucleonmentioning

confidence: 85%

Section: Observational Constraintsmentioning

confidence: 99%

Section: A Strange Quark Content Of the Nucleonmentioning

confidence: 99%

“…Direct detection limits depend on the strange quark content of the nucleon, f s , and we use the lattice values [20] for our analysis. In App.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Prospects and blind spots for neutralino dark matter

Cheung

Hall²,

Pinner³

et al. 2013

J. High Energ. Phys.

198

271

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Heavy WIMP Effective Theory

Solon

2016

Springer Theses

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Heavy WIMP Effective Theory

Solon¹

2016

Heavy WIMP Effective Theory

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The discovery of a Standard Model-like Higgs boson and the hitherto absence of evidence for other new states may indicate that if WIMPs comprise cosmological dark matter, they are heavy compared to electroweak scale particles, M m W ± , m Z 0. In this limit, the absolute cross section for a WIMP of given electroweak quantum numbers to scatter from a nucleon becomes computable in terms of Standard Model parameters. We develop effective field theory techniques to analyze the heavy WIMP limit of WIMP-nucleon scattering, and present the first complete calculation of the leading spin-independent cross section in Standard Model extensions consisting of one or two electroweak SU (2)W × U (1)Y multiplets. The impact on scattering cross sections of the choice of WIMP quantum numbers and an extended Higgs sector is investigated. Introduction. Cosmological evidence for dark matter (DM) consistent with Weakly Interacting Massive Particles (WIMPs) motivates laboratory searches for such particles interacting with nuclear targets. Search strategies and detection potential are highly dependent on the WIMP's properties including its spin, its mass, M , and its Standard Model (SM) gauge quantum numbers. In the absence of other signals to guide the search for physics beyond the SM, it is important to identify plausible cross section targets to guide and interpret next generation searches.

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Dark Matter, Constrained Minimal Supersymmetric Standard Model, and Lattice QCD

Cited by 197 publications

References 29 publications

Prospects and blind spots for neutralino dark matter

Prospects and blind spots for neutralino dark matter

Heavy WIMP Effective Theory

Heavy WIMP Effective Theory

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