Coannihilation effects in supergravity and D-brane models
By R. Arnowitt, Bhaskar Dutta, Y. Santoso. 2001
142 citations recorded by the source corpus.
Abstract Coannihilation effects in neutralino relic density calculations are examined for a full range of supersymmetry parameters including large tanβ and large A0 for stau, chargino, stop and sbottom coannihilation with the neutralino. Supergravity models possessing grand unification with universal soft breaking (mSUGRA), models with nonuniversal soft breaking in the Higgs and third generation sparticles, and D-brane models with nonuniversal gaugino masses were analysed. Unlike low tanβ where m0 is generally small, stau coannihilation corridors with high tanβ are highly sensitive to A0, and large A0 allows m0 to become as large as 1 TeV. Nonuniversal soft breaking models at high tanβ also allow the opening of a new annihilation channel through the s-channel Z pole with acceptable relic density, allowing a new wide band in the m0–m1/2 plane with m1/2≳400 GeV and m0 rising to 1 TeV. The D-brane models considered possess stau coannihilations regions similar to mSUGRA, as well as small regions of chargino coannihilation. Neutralino–proton cross sections are analysed for all models and it is found that future detectors for halo wimps will be able to scan essentially the full parameter space with m1/2
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/bd51036a2fae276b404b229b55d8d7606ac36216
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In Nuclear and High Energy Physics
- M. Raidal
- G. Arcadi
- Abdelhak Djouadi
- E. M. Sessolo
- L. Roszkowski
- S. Trojanowski
- Alessandro Strumia
- K. Kannike
Citations in the corpus
- Dark Matter through the Higgs portal (2019, background): “The most commonly considered coannihilation scenarios are with the lightest slepton (typically the τ) [253,538–541] or the lightest squark (typically the lightest stop squark) [541–544].”
- WIMP dark matter candidates and searches—current status and future prospects (2017, background): “In particular, such coannihilations can occur with the lightest stop [495], t̃1, or with the lightest sbottom, b̃1, which are often the lightest squark states [496].”