Neutralino dark matter in minimal supergravity: Direct detection versus collider searches

Baer, Howard; Brhlik, Michal

doi:10.1103/physrevd.57.567

Cited by 218 publications

(103 citation statements)

References 57 publications

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“…There has been a great deal of activity in computing the relic density for various regions of MSSM parameter space [415,416,417,418,419,414,413,420,421,422,423,424,425,426,106,427,428,429,430,431,432,433,434,435,436,437,438,439,440,441,442,443,444,445,446,447,448,449]. The state of the art numerical programs take into account nearly 8000 Feynman diagrams.…”

Section: Computing the Lsp Densitymentioning

confidence: 99%

The soft supersymmetry-breaking Lagrangian: theory and applications

Chung

Everett

Kane³

et al. 2005

Physics Reports

415

339

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After an introduction recalling the theoretical motivation for low energy (100 GeV to TeV scale) supersymmetry, this review describes the theory and experimental implications of the soft supersymmetry-breaking Lagrangian of the general minimal supersymmetric standard model (MSSM). Extensions to include neutrino masses and nonminimal theories are also discussed. Topics covered include models of supersymmetry breaking, phenomenological constraints from electroweak symmetry breaking, flavor/CP violation, collider searches, and cosmological constraints including dark matter and implications for baryogenesis and inflation.

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Section: Computing the Lsp Densitymentioning

confidence: 99%

The soft supersymmetry-breaking Lagrangian: theory and applications

Chung

Everett

Kane³

et al. 2005

Physics Reports

415

339

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show abstract

“…There is no strong argument why these parameters should be universal for supersymmetric particles with different quantum numbers, e.g., d, u and e, though this may occur in some grand unified theories, as may unification of the gaugino masses M a . The simplified version of the MSSM in which universality at the grand unification scale is assumed for each of M a , m 2 and A is called the constrained MSSM (CMSSM) [55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78].…”

Section: Renormalization-group Equations and Electroweak Symmetry Brementioning

confidence: 99%

Supersymmetric dark matter candidates

Ellis

Olive²

2010

Particle Dark Matter

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CERN-PH-TH/2010-004, UMN-TH-2831/10, FTPI-MINN-10/02After reviewing the theoretical, phenomenological and experimental motivations for supersymmetric extensions of the Standard Model, we recall that supersymmetric relics from the Big Bang are expected in models that conserve R parity. We then discuss possible supersymmetric dark matter candidates, focusing on the lightest neutralino and the gravitino. In the latter case, the next-to-lightest supersymmetric particle is expected to be long-lived, and possible candidates include spartners of the tau lepton, top quark and neutrino. We then discuss the roles of the renormalization-group equations and electroweak symmetry breaking in delimiting the supersymmetric parameter space. We discuss in particular the constrained minimal extension of the Standard Model (CMSSM), in which the supersymmetry-breaking parameters are assumed to be universal at the grand unification scale, presenting predictions from a frequentist analysis of its parameter space. We also discuss astrophysical and cosmological constraints on gravitino dark matter models, as well as the parameter space of minimal supergravity (mSUGRA) models in which there are extra relations between the trilinear and bilinear supersymmetry-breaking parameters, and between the gravitino and scalar masses. Finally, we discuss models with non-universal supersymmetry-breaking contributions to Higgs masses, and models in which the supersymmetry-breaking parameters are universal at some scale below that of grand unification. From 'Particle Dark Matter: Observations, Models and Searches' edited byGianfranco Bertone

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“…This sensitivity of the dark matter density to parameters are particularly relevant for models with compressed and/or very heavy spectra that have survived LHC searches. Examples of specific choices of heavy spectra that yield the correct cosmological dark matter density include scenarios in which the LSP, χ, would have annihilated with itself JHEP02(2016)071 through a direct-channel boson such as the heavier neutral Higgs bosons A and H [32][33][34][35][36]. Alternatively, there might be one or more heavier supersymmetric particles that are nearly degenerate with the LSP, χ, and would have coannihilated with it in the early Universe [37].…”

Section: Introductionmentioning

confidence: 99%

“…The possibility of gluino coannihilation does not arise in the minimal supersymmetric extension of the Standard Model (MSSM) with the soft supersymmetry-breaking parameters constrained to be universal at the input GUT scale (the CMSSM) [14,[32][33][34][35][36][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87][88][89][90][91][92], nor in related models with non-universal Higgs masses [83,84,[93][94][95][96][97][98][99][100][101][102][103][104][105][106]. However, as we discuss in this paper, gluino coannihilation can become important in variants of the MSSM with non-universal gaugino masses, and in variations of pure gravity mediation (PGM) with non-minimal matter content such as additional vector-like supermultiplets [67][68][69].…”

Section: Introductionmentioning

confidence: 99%

Scenarios for gluino coannihilation

Ellis

Evans

Luo

et al. 2016

J. High Energ. Phys.

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We study supersymmetric scenarios in which the gluino is the next-to-lightest supersymmetric particle (NLSP), with a mass sufficiently close to that of the lightest supersymmetric particle (LSP) that gluino coannihilation becomes important. One of these scenarios is the MSSM with soft supersymmetry-breaking squark and slepton masses that are universal at an input GUT renormalization scale, but with non-universal gaugino masses. The other scenario is an extension of the MSSM to include vector-like supermultiplets. In both scenarios, we identify the regions of parameter space where gluino coannihilation is important, and discuss their relations to other regions of parameter space where other mechanisms bring the dark matter density into the range allowed by cosmology. In the case of the non-universal MSSM scenario, we find that the allowed range of parameter space is constrained by the requirement of electroweak symmetry breaking, the avoidance of a charged LSP and the measured mass of the Higgs boson, in particular, as well as the appearance of other dark matter (co)annihilation processes. Nevertheless, LSP masses m χ 8 TeV with the correct dark matter density are quite possible. In the case of pure gravity mediation with additional vector-like supermultiplets, changes to the anomalymediated gluino mass and the threshold effects associated with these states can make the gluino almost degenerate with the LSP, and we find a similar upper bound.

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Neutralino dark matter in minimal supergravity: Direct detection versus collider searches

Cited by 218 publications

References 57 publications

The soft supersymmetry-breaking Lagrangian: theory and applications

The soft supersymmetry-breaking Lagrangian: theory and applications

Supersymmetric dark matter candidates

Scenarios for gluino coannihilation

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