Neutralino relic density in minimal supergravity with co-annihilations
By Howard Baer, C. Balázs, Alexander Belyaev. 2002
145 citations recorded by the source corpus.
We evaluate the relic density of neutralinos in the minimal supergravity (mSUGRA) model. All 2?2 neutralino annihilation diagrams, as well as all processes involving sleptons, charginos, neutralinos and third generation squarks are included. Relativistic thermal averaging of the velocity times cross sections is performed. We find that co-annihilation effects are only important on the edges of the model parameter space, where some amount of fine-tuning is necessary to obtain a reasonable relic density. Alternatively, at high tan ?, annihilation through very broad Higgs resonances gives rise to an acceptable neutralino relic density over broad regions of parameter space where little or no fine-tuning is needed. Finally, we compare our results against the reach of various e+e? and hadron colliders for supersymmetric matter.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/89accf09d56a87a9e775ad74060830d9477f3538
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The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Astronomy and Astrophysics
- M. Raidal
- G. Arcadi
- Abdelhak Djouadi
- C. Arina
- Olivier Mattelaer
- Fabio Maltoni
- Mihailo Backovic
- Alessandro Strumia
In Nuclear and High Energy Physics
- M. Raidal
- G. Arcadi
- Olivier Mattelaer
- Fabio Maltoni
- Abdelhak Djouadi
- Mihailo Backovic
- Gopolang Mohlabeng
- L. Mantani
Citations in the corpus
- Updated Constraints on the Minimal Supergravity Model (2002, methodology): “[17], all relevant neutralino annihilation and co-annihilation reactions are evaluated at tree level using the CompHEP [30] program for automatic evaluation of the associated 7618 Feynman diagrams.”
- MadDM v.3.0: A comprehensive tool for dark matter studies (2018, background): “run # [02] : mass#52 # [03] : Omegah^2 # [04] : x_f # [05] : sigmav(xf) # [06] : xsi # [07] : sigmaN_SI_p # [08] : lim_sigmaN_SI_p # [09] : sigmaN_SI_n # [10] : lim_sigmaN_SI_n # [11] : sigmaN_SD_p # [12] : lim_sigmaN_SD_p # [13] : sigmaN_SD_n # [14] : lim_sigmaN_SD_n # [15] : Nevents # [16] : smear”
- 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].”