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Long-lived Stops in MSSM Scenarios with a Neutralino LSP
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). (Elementarpartikelfysik)
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). (CoPS)
Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). (Elementarpartikelfysik)
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). (Elementarpartikelfysik)
2010 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 8, 005- p.Article in journal (Refereed) Published
Abstract [en]

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 co-anihilation 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/c2 can be detected after one year of running at design luminosity

Place, publisher, year, edition, pages
2010. no 8, 005- p.
Keyword [en]
Supersymmetry Phenomenology
National Category
Subatomic Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:su:diva-47095DOI: 10.1007/JHEP08(2010)005ISI: 000282368500061OAI: oai:DiVA.org:su-47095DiVA: diva2:373008
Funder
Swedish Research Council
Available from: 2010-11-29 Created: 2010-11-29 Last updated: 2017-12-12Bibliographically approved

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Johansen, MarianneEdsjö, JokaimHellman, StenMilstead, David
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