Supersymmetry and Dark Matter

Arnowitt, R.; Dutta, Bhaskar

doi:10.1007/978-3-642-55739-2_17

Cited by 11 publications

(28 citation statements)

References 32 publications

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“…There are even scenarios that interpolate between mSUGRA and some of the AMSB and string inspired methodology [17]. Another approach without necessarily an underlying framework for supersymmetry breaking, lifts, at the GUT scale, the mass degeneracies of the mSUGRA model either in the sector of the gaugino [18,19,20,21,22], Higgs [23,24] or the sfermions [25,21]. Some analyses let…”

Section: Jhep03(2004)012mentioning

confidence: 99%

Lower limit on the neutralino mass in the general MSSM

Bélanger¹,

Boudjema²,

Cottrant³

et al. 2004

J. High Energy Phys.

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We discuss constraints on SUSY models with non-unified gaugino masses and R P conservation. We derive a lower bound on the neutralino mass combining the direct limits from LEP, the indirect limits from (g − 2) µ , b → sγ, B s → µ + µ − and the relic density constraint from WMAP. The lightest neutralino mχ0 1 ≈ 6 GeV is found in models with a light pseudoscalar with M A < 200 GeV and a large value for tan β. Models with heavy pseudoscalars lead to mχ0 1 > 18(29) GeV for tan β = 50(10). We show that even a very conservative bound from the muon anomalous magnetic moment can increase the lower bound on the neutralino mass in models with µ < 0 and/or large values of tan β. We then examine the potential of the Tevatron and the direct detection experiments to probe the SUSY models with the lightest neutralinos allowed in the context of light pseudoscalars with high tan β. We also examine the potential of an e + e − collider of 500 GeV to produce SUSY particles in all models with neutralinos lighter than the W . In contrast to the mSUGRA models, observation of at least one sparticle is not always guaranteed.

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Section: Jhep03(2004)012mentioning

confidence: 99%

Lower limit on the neutralino mass in the general MSSM

Bélanger¹,

Boudjema²,

Cottrant³

et al. 2004

J. High Energy Phys.

View full text Add to dashboard Cite

show abstract

“…Only in a small segment of the allowed parameter space the rates are above the present experimental goals [20,22,24]. We thus looked for characteristic experimental signatures for background reduction, i.e.…”

Section: Discussionmentioning

confidence: 97%

“…One starts with representative input in the restricted SUSY parameter space as described in the literature [20,22] (see also Arnowitt and Dutta [24]). We have adopted a similar procedure, which has previously described [20] and will not be repeated here.…”

Section: The Essential Theoretical Ingredients Of Direct Detectionmentioning

confidence: 99%

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Theoretical directional and modulated rates for direct supersymmetric dark matter detection

Vergados

2003

Phys. Rev. D

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Exotic dark matter together with the vacuum energy (cosmological constant) seem to dominate in the flat Universe. Thus direct dark matter detection is central to particle physics and cosmology. Supersymmetry provides a natural dark matter candidate, the lightest supersymmetric particle (LSP). It is possible to obtain detectable rates, but realystically they are expected to be much lower than the present experimental goals. So one should exploit two characteristic signatures of the reaction, namely the modulation effect and the correlation with the sun's motion in directional experiments. In standard non directional experiments the modulation is small, less than two per cent. In the case of the directional experiments, the main subject of this paper, we find two novel features, which are essentially independent of the SUSY model employed, namely: 1) The forwardbackward asymmetry, with respect to the sun's direction of motion, is very large and 2) The modulation observed in a plane perpendicular to the sun's motion can be higher than 20 per cent and is direction dependent.

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“…Since the expected event rates for direct neutralino detection are very low [5,8], in the present work we looked for characteristic experimental signatures for background reduction, such as:…”

Section: Discussionmentioning

confidence: 99%

Exploring Novel Signatures in Direct Neutralino Searches

Vergados

Dark Matter in Astro- And Particle Physics

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Abstract. Since the expected rates for neutralino-nucleus scattering are expected to be small, one should exploit all the characteristic signatures of this reaction. Such are: (i) In the standard recoil measurements the modulation of the event rate due to the Earth's motion. (ii) In directional recoil experiments the correlation of the event rate with the sun's motion. One now has both modulation, which is much larger and depends not only on time, but on the direction of observation as well, and a large forward-backward asymmetry. (iii) In non recoil experiments gamma rays following the decay of excited states populated during the Nucleus-LSP collision. Branching ratios of about 6 percent are possible (iv) novel experiments in which one observes the electrons produced during the collision of the LSP with the nucleus. Branching ratios of about 10 per cent are possible.

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Supersymmetry and Dark Matter

Cited by 11 publications

References 32 publications

Lower limit on the neutralino mass in the general MSSM

Lower limit on the neutralino mass in the general MSSM

Theoretical directional and modulated rates for direct supersymmetric dark matter detection

Exploring Novel Signatures in Direct Neutralino Searches

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