| Autor: |
Johansen, M., Edsjo, J., Hellman, S., Milstead, D. |
| Rok vydání: |
2010 |
| Předmět: |
|
| Zdroj: |
JHEP 1008:005,2010 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1007/JHEP08(2010)005 |
| Popis: |
This work investigates the possibility of a long-lived stop squark in supersymmetric models with the neutralino as the lightest supersymmetric particle (LSP). We study the implications of meta-stable stops on the sparticle mass spectra and the dark matter density. We find that in order to obtain a sufficiently long stop lifetime so as to be observable as a stable R-hadron at an LHC experiment, we need to fine tune the mass degeneracy between the stop and the LSP considerably. This increases the stop-neutralino coanihilation cross section, leaving the neutralino relic density lower than what is expected from the WMAP results for stop masses ~1.5 TeV/c^2. However, if such scenarios are realised in nature we demonstrate that the long-lived stops will be produced at the LHC and that stop-based R-hadrons with masses up to 1 TeV/c^2 can be detected after one year of running at design luminosity. |
| Databáze: |
arXiv |
| Externí odkaz: |
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